[OSGeo-Discuss] CUGOS Spring Fling 2023 updated schedule
Hi geospatial folks, the date for CUGOS Spring Fling 2023 is nearing and we have an updated schedule (which admittedly is a pretty brilliant lineup of talks ) including added details about the OpenSidewalks (OSM) Hackathon on Saturday. Come on out and join us for one or both days, we still have tickets available, or schedule and registration go to <https://cugos.org/2023-spring-fling/> https://cugos.org/2023-spring-fling/ The main conference day will be on Friday, April 21, 2023, at Univ. Of Washington, Seattle, WA. at the Bill & Melinda Gates Center for CS & Engineering(CSE2). On Saturday, April 22, 2023, there will be an OpenStreetMap (OSM) Hackathon organized by the OpenSidewalks Project. What is expect: awesome talks involving open source geospatial technology and open data meeting old and making new friends birds of a feather (unconference style) sessions morning coffee and free pizza lunch raffle book prizes from or donor Locate Press - check out the full list of our awesome sponsors at https://cugos.org/2023-spring-fling/#sponsors Cheers and we hope to meet you soon Karsten and the whole CUGOS team ______ Karsten Vennemann - Among other things current CUGOS president - PS: Note that if you are a presenter, you are automatically registered for CUGOS Spring Fling 2023, and no further action regarding registration is required from your side. ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] CUGOS Spring Fling 2023 schedule is live, registration open !
Hi GIS aficionados, we are excited to announce that the CUGOS Spring Fling 2023 schedule and registration are now live at <https://cugos.org/2023-spring-fling/> https://cugos.org/2023-spring-fling/ ! The main conference day will be on Friday, April 21, 2023, at Univ. Of Washington, Seattle, WA. at the Bill & Melinda Gates Center for CS & Engineering(CSE2). On Saturday, April 22, 2023, there will be an OpenStreetMap (OSM) Hackathon organized by the OpenSidewalks Project. Don't hesitate to register if you are interested because we only have some tickets available. Note that if you are a presenter, you are automatically registered for CUGOS Spring Fling 2023, and no further action regarding registration is required from your side. If your organization is interested to become a sponsor for CUGOS Spring Fling 2023, please reach out to us at he...@cugos.org to find out more. Current sponsors are listed at https://cugos.org/2023-spring-fling/#sponsors Overall sponsorships and donations will enable CUGOS to pay for free food and drinks for attendees at the event, while the vast majority of these funds will be used to establish these 2 grant programs <https://cugos.org/grants/> CUGOS is working on. Cheers and we hope to meet you soon Karsten and the whole CUGOS team ______ Karsten Vennemann - Among other things current CUGOS president - ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] CUGOS Spring Fling 2023
Hi FOSS geospatial aficionados, After a long hiatus since the CUGOS "Fall Fling" 2019, we are excited to announce the CUGOS Spring Fling 2023 ! Please mark your calendars for Friday, April 21 and Saturday, April 22 2023. Registration will open on March 21 once the agenda has been established. Details can be found at <https://cugos.org/2023-spring-fling/> https://cugos.org/2023-spring-fling/. We need your submissions: The "Call for Proposals" is now open and you can submit proposals for talks/presentations via a web form at <https://forms.gle/fXFtj2hnG6PYyLuN9> https://forms.gle/fXFtj2hnG6PYyLuN9 until March 10th. Cheers Karsten Karsten Vennemann Among other things current CUGOS president For a long and potentially boring explanation - aka what CUGOS and "Spring Fling" is see below - The Cascadia Users of Geospatial Open Source (CUGOS) was formed in 2007. CUGOS acts as the <http://wiki.osgeo.org/wiki/Cascadia> Cascadia Chapter of the <http://www.osgeo.org/> OSGeo Foundation. We are an active group of members who are passionate about open source software, GIS, and our region. We have members from all walks of life, a large spectrum of business and academia, and active OSGeo members (board members, charter members, and active project participants). It is a non-profit organization in Seattle focused on building a community around open source geospatial tools and practices see also https://cugos.org/about/. CUGOS has been around for nearly 15 years, providing a space for folks to share their work and passion for maps. This year we're holding the Spring Fling on April 21-22 2023, a two-day low cost event bringing together academics, professionals, students, and enthusiasts for a series of talks about Pedestrian/Bike/Transit Access, Open Source Geospatial tools, open data, and Social Justice in and beyond the Puget Sound region. The first day will be the main conference day with presentations about open source GIS projects (e.g. such projects might include but are not limited to: QGIS, PostGIS, MapServer, GDAL/OGR and OpenLayers, see also https://www.osgeo.org/projects/), the second day will be a volunteer OpenStreetMap (OSM) Hackathon in conjunction with the OpenSidewalks <https://tcat.cs.washington.edu/opensidewalks-2/> Project. More information to be added on the web page soon. For Spring Fling we are are currently putting together the program. If you are interested in giving a presentation head over to our <https://forms.gle/fXFtj2hnG6PYyLuN9> Call for proposals page. The final program will be announced on March 21st and registration (donate as you wish) will open. If in the meantime you are looking for inspiration on what to expect in our program you are welcome to check out the schedules of these previous CUGOS Fling events: * 2015 <https://cugos.org/2015-spring-fling/2016> https://cugos.org/2015-spring-fling/ * 2016 <https://cugos.org/2016-spring-fling/> https://cugos.org/2016-spring-fling/ *<https://cugos.org/2017-spring-fling/> 2017 Spring Fling *<https://cugos.org/2019-fall-fling/> 2019 Fall Fling We are also in the process of building these grants from donations from corporate sponsors <https://cugos.org/grants/> https://cugos.org/grants/ ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] pointers to open source digital "twin software" projects/efforts
Hi All, a friend asked me if I knew about open source digital "twin software". While I have heard about the concept unfortunately I have am not aware what exists in this field and in addition is open source. I found this article online summarizing some efforts ( https://www.vortech.nl/en/an-open-source-platform-for-digital-twins/ ) but I am not sure how new this is. Can anyone on this list point me to any efforts in regards to this ? Thanks so much Cheers Karsten Karsten Vennemann Principal Terra GIS LTD 2119 Boyer Ave E Seattle, WA 98112 USA <http://www.terragis.net/> www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] [OSGeo-Conf] Announcement: Call for Location global FOSS4G 2023
Dear (OS)Geo friends, > > we really hope that FOSS4G2023 can be safely > organized in > > physical format. >> Why? >>> Because we humans are social animals; and people like me, who are almost completely burnt out by not having been outside of their houses for nearly >>> two years, could really use an in-person event to see their friends and their personal heroes. Exactly, I can only say yes, yes and yes to this. For me the social interaction is the main reason (at least for me) to attend such and event (even an online one). I can go even a step further: while the technical/subject content is nice, often even great that is not the main driver to attend such and event - I can watch such in video and recordings all over the web online any time, but the human interaction, networking and all that is priceless. It is absolutely a main driver for such events. This is not going to be covered with any online event (even a great one like FOSS4G Argentina last year), yup it still does not come even close, too much is lost in 'translation'. >>> I'm not gonna attack Jonathan's points (or even reply to them, risking an episode of sealioning to erode my patience), Neither will I do, some of the points are definitely valid >>> but I want to make one of my own: >>> It's good for our collective mental health. We *want* an in person event, we >>> *hope* for it; which for me is a sign our brains have some demand for it, even if it's intangible. While there are many pros and cons (online vs. in person) that could lead to "years of discussions' and a hundred people have 300 opinions - for me it really boils down to the need for the social interactions (and all the myriad of benefits that stem from that) mentioned above. I did not even start listing all my personal benefits (as a 'placeholder' example) I had after I attended my fist FOSS4G Vancouver in 2007 (and other conferences over the years) because I don't want to go into the "nitty gritty" here. Long live FOSS4G "in person" events ! Cheers Karsten Principal TerraGIS LTD www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] best practices vector tile features and content
Hi All, after working 'for ages' with PostGIS, MapServer, WMS and OpenLayers and while I have dabbled with vector tiles a bit e.g. see in this benchmark of T-Rex and MapServer https://blog.sourcepole.ch/assets/2019/mvtbench-foss4g19.pdf am finally ready to embark on using vector tiles in a production project for the first time. I would like to create my own custom vector tiles for a project and am not sure how much data I should dump all together into the same set of mbtile vector tile files. For example I would want create a base map using OSM source data and its seems to work pretty ok to have all of these features in one series of the mbtiles. Now when I am adding other data such as soil maps, rainfall in mm, geology units and so on as layers this question arises: Should I just dump all (or several) of those into the same set of mbtile files as well? Technically it seems that that should be possible to style even that on a map, but I am no sure it it would be advised to do so. Is there anyone that has some thoughts or best practices to share regarding this ? I was also wondering if there is a recommended /advised / ideal maximum number of feature per tile ? Thanks Karsten Karsten Vennemann <http://www.terragis.net> www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Is GmapGIS open source?
For me it means both though _ From: James Klassen [mailto:klassen...@gmail.com] Sent: Friday, March 26, 2021 09:40 To: karsten Cc: SERGIO ACOSTAYLARA; OSGeo Discussions Subject: Re: [OSGeo-Discuss] Is GmapGIS open source? I think there may be some confusion over the meaning of "free" in FOSS. "Free" in FOSS means free as in libre, referencing the "Four Essential Freedoms", not free as in no cost. It is actually a stronger statement than "open". See: https://en.wikipedia.org/wiki/The_Free_Software_Definition On Fri, Mar 26, 2021, 11:26 karsten wrote: HI Sergio, well it might not be open source but is 'free just as in the acronym FOSS = Free and Open Source Software (as for example the OSGEO flagship conference FOSS4G), so while open is certainly more desirable 'only' free as I see it is also part of FOSS. That is just to say one potentially should not prevent someone presenting on that software based only because it is free but not open source - at least I think so because it could still be useful for users out there Just my 2 cents Cheers Karsten _ From: SERGIO ACOSTAYLARA [mailto:sergio.acostayl...@mtop.gub.uy] Sent: Friday, March 26, 2021 05:04 To: karsten; discuss@lists.osgeo.org Subject: RE: [OSGeo-Discuss] Is GmapGIS open source? Thank you Karsten. The question was because we are receiving proposals for a congress that we are organizing and we ask -if possible- to use open source software. Best, Sergio Acosta y Lara Departamento de Geomática Dirección Nacional de Topografía Ministerio de Transporte y Obras Públicas URUGUAY (598)29157933 ints. 20329/20330 http://geoportal.mtop.gub.uy/ _ De: karsten Enviado: jueves, 25 de marzo de 2021 17:12 Para: SERGIO ACOSTAYLARA; discuss@lists.osgeo.org Asunto: RE: [OSGeo-Discuss] Is GmapGIS open source? Hi Sergio, while it appears to be free to me it see,s not to be open source because in that case one would be be to find the source code (and I could not). Also note that this tool might be kind of outdated (seems to use an old version of extjs as a JS library as user GUI) so be ware that it might be a bit outdated. Cheers Karsten _ From: Discuss [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of SERGIO ACOSTAYLARA Sent: Thursday, March 25, 2021 13:04 To: discuss@lists.osgeo.org Subject: [OSGeo-Discuss] Is GmapGIS open source? Sorry for my ignorance but I couldn't find out if this tool is open source. Thanks for your help. Sergio Acosta y Lara Departamento de Geomática Dirección Nacional de Topografía Ministerio de Transporte y Obras Públicas URUGUAY (598)29157933 ints. 20329/20330 http://geoportal.mtop.gub.uy/ ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Is GmapGIS open source?
HI Sergio, well it might not be open source but is 'free just as in the acronym FOSS = Free and Open Source Software (as for example the OSGEO flagship conference FOSS4G), so while open is certainly more desirable 'only' free as I see it is also part of FOSS. That is just to say one potentially should not prevent someone presenting on that software based only because it is free but not open source - at least I think so because it could still be useful for users out there Just my 2 cents Cheers Karsten _ From: SERGIO ACOSTAYLARA [mailto:sergio.acostayl...@mtop.gub.uy] Sent: Friday, March 26, 2021 05:04 To: karsten; discuss@lists.osgeo.org Subject: RE: [OSGeo-Discuss] Is GmapGIS open source? Thank you Karsten. The question was because we are receiving proposals for a congress that we are organizing and we ask -if possible- to use open source software. Best, Sergio Acosta y Lara Departamento de Geomática Dirección Nacional de Topografía Ministerio de Transporte y Obras Públicas URUGUAY (598)29157933 ints. 20329/20330 http://geoportal.mtop.gub.uy/ _ De: karsten Enviado: jueves, 25 de marzo de 2021 17:12 Para: SERGIO ACOSTAYLARA; discuss@lists.osgeo.org Asunto: RE: [OSGeo-Discuss] Is GmapGIS open source? Hi Sergio, while it appears to be free to me it see,s not to be open source because in that case one would be be to find the source code (and I could not). Also note that this tool might be kind of outdated (seems to use an old version of extjs as a JS library as user GUI) so be ware that it might be a bit outdated. Cheers Karsten _ From: Discuss [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of SERGIO ACOSTAYLARA Sent: Thursday, March 25, 2021 13:04 To: discuss@lists.osgeo.org Subject: [OSGeo-Discuss] Is GmapGIS open source? Sorry for my ignorance but I couldn't find out if this tool is open source. Thanks for your help. Sergio Acosta y Lara Departamento de Geomática Dirección Nacional de Topografía Ministerio de Transporte y Obras Públicas URUGUAY (598)29157933 ints. 20329/20330 http://geoportal.mtop.gub.uy/ ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] HPGLlibrary in OsGeo projects?
Hi all, I have been an open source GIS user and enthusiast for many years but interestingly today (for the first time ever) heard about a library HPGL ( High Performance Geostatistics Library ) see https://hpgl.github.io/hpgl/index.html Would anyone know if access to those algorithms have been implemented in any of the OSGEO projects (like QGIS or others) Cheers <https://activate.united.com/no-content?ch=3=2_medium=email_campa ign=210224_MPPT_21918_MPDining_February_C21918_source=Partner_Entert ainment_content=0_ET01=UlAyNTU2MDk=_date=20210224_HASH=d49 d305772a4472057e1f2b5b7edfa9fc68e330dad48db848d091525bb1d8bd4> Karsten <https://news.united.com/pub/as?_ri_=X0Gzc2X%3DAQpglLjHJlTQGNibTuJXLcJsttrGd MoY5RFfDMkhPrhsT18yPY2UzfSjXFTOWOaGnVXHkMX%3Dw&_ei_=Ejl9xtK7c5PDwuLqT6LXlAsx nf6diTqJKu5ht2G41mSqOqkxh0yvnkPJMuiX-JaHWTYf2t9lyOQG41mybBHNCw66-YjbcD7CKURI 5wdItLVlbSbJHLDCROuwjcHg2j-SPf3fJya-78TJIIgibteZ-BvUmS6ZY2VpyN8j.> <https://tags.bluekai.com/site/36540?e_id_s36540=d49d305772a4472057e1f2b5b7e dfa9fc68e330dad48db848d091525bb1d8bd4_id_m36540=85041f543d66f79b31bc632f91 d2e6b3=57090585> <https://ib.adnxs.com/getuid?https://a.adrsp.net/dsp/ci/2/EaFN237B9UU0pvf4oE V8O-yQh7TGIfJSGAZH1Cj0PHi1l9g4dvkGDv20VyTo5X7OxjlNBiGYGDsZB48oZUU-6ZQ-PuQC/% 24UID> ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] increase efficiency of analysis with r.grow.distance aka Euclidean allocation
Hi All, I am working on a project that requires to find the middle boundary between raster regions (of the same value) using a maximum buffer distance. The raster input I am using is quite large like 5m resolution and 10 by 10 cells. One approach I took was to fill all cells in areas outside the raster regions in question which I will need to buffer to NULL and then using the r.grow.distance in GRASS (similar to the Tool Euclidean allocation in ArcGIS). This works with smaller files but with a big input like the one above calculation time is very long or might crash even on a fast PC. The only remedy I found (apart from throwing larger RAM or hardware at the task) so far was cutting up the raster file in tiles and running the analysis on each tile and putting the results back afterwards to get to final result layer. Would anyone have hints if there are other approaches that I could increase the efficiency of this analysis in GRASS or have any knowledge of other tool sets such as R or python scripts that are already available for something like this ? Cheers Karsten Karsten Vennemann <http://www.terragis.net> www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Soil Map
While is not regional/ local data either and not is vector format but raster format - this is the overarching site for the world soil grid data that has been in the works for many years now. Pretty cool (at least for me as a soil scientist that is): https://ecodiv.earth/post/downloading-soilgrid-data/ And also a bit off topic: the data that went into this for the african continent was produced with help of the Bill and Melinda Gates Foundation in the AFSIS project http://africasoils.net/ I was part of a project using these africa soil grids (250m resolution) as base data for a food security project see here http://www.trans-sec.org/ and here http://www.fao.org/land-water/land/land-governance/land-resources-planning-t oolbox/category/details/en/c/1176418/ Karsten -Original Message- From: Discuss [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Jonathan Moules Sent: Friday, December 04, 2020 12:21 To: Markus Neteler; Criniere, Maxence Cc: discuss@lists.osgeo.org Subject: Re: [OSGeo-Discuss] Soil Map The ISRIC have something - https://www.isric.org/explore - They seem to be the international soil people and have a "World Data Centre for Soils". (They even have a FOSS4G t-shirt in their team photo!) (Heading slightly offtopic, but they have a nifty Virtual Soil Museum too - https://wsm.isric.org/ - COVID safe museum-ing) On 2020-12-02 16:43, Markus Neteler wrote: > Hi Maxence, > > On Fri, Nov 27, 2020 at 10:34 AM Criniere, Maxence > wrote: >> Hello, >> >> I work in agronomy and I am looking for the Serbian soil map in shapefile format to integrate it into a GIS. >> I saw that the map exists but I can't find it on the internet. Could I have access to this map in the shapefile (shp) ? >> It's possible to have an acess to a WMS link to have this map ? > If no-one in this list has a pointer where to find a Serbian soil map > you may post the question here: > > https://opendata.stackexchange.com/ > > Regards, > > Markus > ___ > Discuss mailing list > Discuss@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] us election data
Hi All, would anyone have knowledge a source they can share to openly available geodata related to the recent US election ? I have already US Census administrative boundaries (such as census tracts, bloc group , blocs or counties) and voting precinct geometries now I am looking for information such as voter turnout and elections results (% or number of votes for each party) for the geometries above Any leads or hints ? Thanks so much Karsten Karsten Vennemann Terra GIS LTD <http://www.terragis.net> www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Qgis network plugins
Hi Nathan, while I myself don't have much experience with network analysis there should be something available for QGIS. However, for other reasons I have used the awesome ORS plug-in https://github.com/GIScience/orstools-qgis-plugin that is build on top of https://openrouteservice.org/services/ . It allows to calculate all kind of isochrones an travel time matrixes and the online API also allows for adding your own route and travel time restrictions ... Cheers Karsten _ From: Discuss [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Nathan D Sent: Thursday, September 24, 2020 11:00 To: discuss@lists.osgeo.org Subject: [OSGeo-Discuss] Qgis network plugins Hello! I have a question regarding network plugins for qgis. I am trying to solve a problem regarding gravel trucks and slope, with the idea of saving money on fuel, as a fully loaded gravel truck uses more gas to go up a slope, rather than down. I have managed to get the slope data I needed, and draped it over the road lines, giving me a start and end slope, with a third column for the average of the start and end slope degrees. The problem is this: I can't find a network analysis plugin for qgis of any kind that allows for user defined impedences, allowing me to create a road hierarchy. I know that ArcGIS has that functionality, but I was hoping that QGIS would have something like that, and I am not sure if I can build it. Get Outlook for <https://aka.ms/ghei36> Android ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] geospatial algorithm to create area midway boundaries from lines ?
Hi Markus, I will look into this Grass function and how I can use it. I am not sure however if it can output polygons rather than lines Cheers Karsten _ From: Markus Neteler [mailto:nete...@osgeo.org] Sent: Friday, March 06, 2020 14:55 To: karsten Cc: OSGeo-discuss Subject: Re: [OSGeo-Discuss] geospatial algorithm to create area midway boundaries from lines ? Hi Karsten, Probably this GRASS GIS Addon can help: https://grass.osgeo.org/grass7/manuals/addons/v.centerline.html If I got your wish right... Best, Markus karsten schrieb am Fr., 6. März 2020, 17:36: Hi All, a general geospatial question to all: I am trying to find out if there is any existing geospatial algorithm (in any open Open Source Geospatial software) that would allow to use a network of lines as a start point and expand those in such a way that I can create new area boundaries for each of the lines "coverage area". What I mean with that is if one could "buffer" the lines out in such a way to create boundaries where any potential buffers would meet at the middle way point between the lines so that in the end I could have an area within that is the starting line. On example could look like this (5 hand drawn lines in red and corresponding colored areas that I would want to create). Note that is exact but to communicate the idea) see http://terra5.terragis.net/sites/html/aeras_for_lines%20copy.png It's kind of similar to Thiessen polygons but for lines instead of points... One preference would be if there was something that could be used programmatically on large data sets ... Cheers Karsten Karsten Vennemann <http://www.terragis.net> www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] geospatial algorithm to create area midway boundaries from lines ?
Hi Pierre, I mean line segments like e.g. in a road or water GIS layer and they could be smooth or rather less smooth. The output I desire should be polygons and not lines. Overall I am looking for nothing exact here - any approximate interpolation about midway plus/minus would be fine... Karsten -Original Message- From: Pierre Abbat [mailto:p...@bezitopo.org] Sent: Friday, March 06, 2020 14:59 To: discuss@lists.osgeo.org Cc: karsten Subject: Re: [OSGeo-Discuss] geospatial algorithm to create area midway boundaries from lines ? On Friday, 6 March 2020 17:36:15 EST karsten wrote: > Hi All, > > a general geospatial question to all: > I am trying to find out if there is any existing geospatial algorithm > (in any open Open Source Geospatial software) that would allow to use > a network of lines as a start point and expand those in such a way > that I can create new area boundaries for each of the lines "coverage > area". What I mean with that is if one could "buffer" the lines out in > such a way to create boundaries where any potential buffers would meet > at the middle way point between the lines so that in the end I could > have an area within that is the starting line. On example could look > like this (5 hand drawn lines in red and corresponding colored areas > that I would want to create). Note that is exact but to communicate > the idea) see > http://terra5.terragis.net/sites/html/aeras_for_lines%20copy.png When you say "lines", do you mean polylines made of line segments, polyarcs, or polyspirals? If polyarcs, will they generally be smooth? If polyspirals, will adjacent spiralarcs osculate, just be tangent, or neither? What sort of lines would the output be? If the input is polyarcs, the output could contain pieces of hyperbola. If the input is polyspirals, the output could contain strange indescribable curves. The only curves used as land boundaries are line segments and circular arcs, so they'd have to be approximated. Pierre -- When a barnacle settles down, its brain disintegrates. Já não percebe nada, já não percebe nada. ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] geospatial algorithm to create area midway boundaries from lines ?
Hi All, a general geospatial question to all: I am trying to find out if there is any existing geospatial algorithm (in any open Open Source Geospatial software) that would allow to use a network of lines as a start point and expand those in such a way that I can create new area boundaries for each of the lines "coverage area". What I mean with that is if one could "buffer" the lines out in such a way to create boundaries where any potential buffers would meet at the middle way point between the lines so that in the end I could have an area within that is the starting line. On example could look like this (5 hand drawn lines in red and corresponding colored areas that I would want to create). Note that is exact but to communicate the idea) see http://terra5.terragis.net/sites/html/aeras_for_lines%20copy.png It's kind of similar to Thiessen polygons but for lines instead of points... One preference would be if there was something that could be used programmatically on large data sets ... Cheers Karsten Karsten Vennemann <http://www.terragis.net> www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] open repository for general research GIS data ?
Dear All, I just had a colleague ask me about open data repositories for GIS files. Despite knowing the usual suspects such as OSM, GeoWiki, Natural earth data , Global administrative areas and so on I am not aware that there would be a more general option to store general research GIS data e.g. for scientific purposes such as agricultural research results ... The original request from my colleague is: "Regarding open GIS data, where are the most stable/accessible/well known depositories of open access data that researchers can add their data to? We are thinking of the possibilities for archiving data layers so that they can be used by anyone, but ( ideally) without us having to take responsibility for running the servers etc. As an example for non-spatial data we use Dataverse." Would anyone be aware of such a repository ? Thanks Karsten Karsten Vennemann www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] how to test if spatial variables (layers) are independent
Hi GIS pros, I am working on creating a model in my desktop GIS to characterize agricultural sites for the purpose to create a layer that can show areas that have similar natural / agricultural site characteristics that can be used for site selection in agricultural research. Input layers will be for example population density, poverty density, land cover , soil types, tree density , precipitation, hydrology, distance to market (for a farmer) , distance to road, agro ecological zones and others more. The idea is to cluster the layers first to avoid evaluating parameters that are in high correlation (or dependant variables) multiple times but come up with a set of layers (or clustered 'synthetic' layers) that can be an input for the model evaluation run. Now I did take some statistics classes 20 years ago but am lacking a clear approach or best practices how to ensure that the layers (aka variables) are independent. I would prefer to do this in QGIS or R statistical package. However, if you know of any good OS tool that is a good fit for this please suggest it to me. I read then searching the internet about the 'mantel test' being suggested by some , others talked about statistical correlation between a independent and dependant variables. But I was not sure if that is the best way to do it as in my case I would want to test the dependency of the variables instead ... Would anyone have suggestions or experience with this that they can share with me ? Cheers Karsten Karsten Vennemann Principal Terra GIS LTD SeattleUSA http://www.terragis.net/ www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] json request to web map ?
Hi All, I have been working with web mapping for quite a while but always with data pulled from files or databases on the server. Now I was wondering about suggestions how to go about mapping data I can request from a JSON feed such as the following http://sourceforge.net/projects/gvsigce/files/stats/json?start_date=2010-01- 01 http://sourceforge.net/projects/gvsigce/files/stats/json?start_date=2010-01 -01end_date=2012-10-10 end_date=2012-10-10 (which are the download statistic for gvSIG CE) Especially if anyone has done something like that without pulling into a data base table before rendering... How would you do that and which tools would you use ? I would preferably use OpenLayers and MapServer... Cheers Karsten Karsten Vennemann http://www.terragis.net/ www.terragis.net === Email scanned by PC Tools - No viruses or spyware found. (Email Guard: 9.0.0.2308, Virus/Spyware Database: 6.20760) http://www.pctools.com/ === ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Remote Sensing in Java
Dear Rashad, please also take a look if http://www.sextantegis.com/ has what you need . Sextante is in 100% Java , has a lot of GIS functions , but also a list of raster processing and some remote sensing algorithms. One additional benefit is that it has been integrated with gvSIG , specifically gvSIG CE (http://gvsigce.sourceforge.net/joomla/index.php/about-gvsig-ce-software ), and also with Jump. By the way it also does allow the easy integration of other external algorithms , e.g. that has been done for integration into ArcGIS or gvSIG via Sextante (i.e. one can access R algorithms and GRASS via Sextante ...) . And not specifically related to Java but remote sensing (and python) this site has information / reviews of capabilities of many open source libraries for remote sensing processing and comparisons to privative software such as Erdas imagine http://cosmicproject.org/ Cheers Karsten === Email scanned by PC Tools - No viruses or spyware found. (Email Guard: 9.0.0.888, Virus/Spyware Database: 6.19250) http://www.pctools.com/ === ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] designing databases, organizing data formats to work with open source and proprietary GIS
Hi all, in the near future I will have the opportunity to help design databases, decide on data formats (files data) for an international organization that wishes to be able to use both proprietary and open source based systems, mostly in web mapping solution but also possibly on the desktop. The task will be to design and organize the data stores in a way that both types of systems - open source (e.g. MapServer, OpenLayers) and proprietary systems (ESRI Arc Server) can use them well, and along the way to try to avoid too much data duplication (having to store data in multiple formats just to make them accessible) . This sounds to like a exiting useful, fun task, but given the limitations of both systems (regarding input data that might not work out of the box- namely file Geodatabases in open source solutions, and PostGIS data in ESRI products) might be not totally trivial ;) I was wondering if anybody has done work on this, has implemented systems facing the same issues or knows of projects or reports that have been dealing with similar issues. Also I anybody has comments about what data storage solution you would recommend and comments about the pro and cons of certain storage designs please send it to the list. Looking forward to hear what other have come up with. Thanks a lot Cheers Karsten Karsten Vennemann Principal Terra GIS LTD USA www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] April 20th is CUGOS 2011 Spring Fling at UW in Seattle
GIS Folks, the event below is still in flux regarding final presentations and definite times subjects but I wanted to get this message out for all to know (copied from http://wiki.osgeo.org/wiki/CUGOS_2011_Spring_Fling): On April 20th, 2011, CUGOS ( http://www.cugos.org/ www.cugos.org, http://cugos.posterous.com/ [1]) will be holding a special all-day spring fling event at University of Washington Seattle Campus in place of our regular monthly meeting. We will provide FREE food and drinks, thanks to following sponsors: TerraGIS( http://terragis.net/ [2]), Spatialdev( http://spatialdev.com/ [3]), Zonar System( http://zonarsystem.com/ [4]) UW Geospatial Club. The basic idea of this event is to come in the morning to learn something new (tools and real workflows)... stick around and apply it in the afternoon on some semi-structured hack sessions... and then learn some high level stuff in the evening. As such, the day will be broken up as follows: * 9-12: morning session -- speed workshops * 12-1: lunch * 1-4: afternoon session -- open hacking * 4-6: dinner * 6-8: evening session -- regular meeting All skill and interest levels are welcome! -- please join us for as much of the day as you can. For more details check http://wiki.osgeo.org/wiki/CUGOS_2011_Spring_Fling http://wiki.osgeo.org/wiki/CUGOS_2011_Spring_Fling and also check back again for updates before you come ;) Cheers Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] OSGEO booth is up at AAG in Seattle
Hi GIS Folks, the OSGEO booth is set-up at AAG 2011 http://www.aag.org/cs/annualmeeting in Seattle. Please please stop by and chat with us if you are in the areas or attending AGG. We have volunteer staffing at the booth starting tonight at the exhibit hall opening and until Friday with support mainly from the CA and Cascadia chapter of OSGEO . See you there during the rest of the week. Cheer Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Re: Creating Value from Raster Data
This was just announced and will add to the ratser classification options in the future: RFP: Agriculture Inventory Land Use Mapping Plugin for QGIS: http://blog.qgis.org/node/147 Also Note that the solution INPE in Brazil is working on is a big effort and can be found under the TerraLib GIS library webpage http://www.terralib.org/ Also see http://www.terralib.org/php/about.php?body=ListofProjects InterIMAGE (by LAC/INPE ) http://www.lvc.ele.puc-rio.br/projects/interimage/ and ZEE - Brazilian Ecological and Economic Zoning Program (by FUNCATE based on TerraLib ) The Ministry of Environment created an Internet Portal to disseminate information related with Brazilian Amazon region. FUNCATE developed a Geographic Database, with themes as Satellite Images, Vegetation, Geology, Geomorphology, Land Use, Protected Areas, Indian Reservations, Remarkable Biodiversity Areas, and Municipalities, with associated social and economic data. Spatial queries could be applied using an Active Server Page application, driven by Terralib. http://geo.funcate.org.br/prefeituras Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Yet another charter member nominee
Hi there, me too I appreciate having being nominated as an OSGeo Charter Member ;). Ok let's include first something about my background: I've been a long time GIS user with a background in Geography and Soil Science. I am a german national currently living in Seattle USA and am operating my small GIS consulting shop. I came to the open Source Geospatial world and later OSGeo mostly because I held a position at a non-profit organization in Seattle that was called CommEn Space. At the time Tim Schaub was a colleague and spurred my interest in Mapserver and all other things related to OS GIS ...Since then I have been excited about this approach (Open Source) and made a choice for myself that this a great approach on how to do things including running a business. It makes it so much easier to indentify myself with my work and get satisfaction instead of attaching myself to particular brands and proprietary approaches. Read more of my views here http://www.terragis.net/about-terra/motivation/ if you are inclined to do so ;) I am participating in the CUGOS OSGeo chapter and involved with user training. I have been giving frequent talks about OS at the local conferences (WAURISA 2007 -20100 and also FOSS4G this year. Because my background is more of an GIS user rather than of a developer (even though I write some scripts) my perspective is that of representing the user of OS Geospatial . I am planning to start ( actually I am in then middle of) starting a new website that allows users to share their (first or second) experiences of all kinds of OS geospatial software. I would like to enhance the documentation resources especially for users in the OS GIS world and see one of the biggest challenges to provide adequate training, support and recourses such as manuals tutorials. This stems from my personal background but also the fact that software without many users will not spread around that much. I have organized several workshops for the CUGOS chapter over the last two years and I am also active teaching professional classes for web GIS and desktop GIS. Most recently my (one person) company became a collaborator of the gvSIG association http://www.gvsig.com/news/the-international-network-of-the-gvsig-association -has-been-extended-usa-japan-and-germany. I would be excited and honored to get more involved with OSGeo through Charter Membership. Cheers Karsten Vennemann Terra GIS LTD Seattle, WA 98112 USA www.terragis.net ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Commercial support (Sebastian E. Ovide)
Sure check out for example http://www.osgeo.org/search_profile Cheers Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Install gvSIG 1.10 on Mac?
Can someone point me in the right direction here please? I'd like to install gvSIG 1.10 under Mac OSX 10.6. From doco at OSGeo project listing and at gvSIG site, the project appears to support Macs. At the downloads page [1], I only see options for Windows and Linux. I'm assuming that the Linux install will also work for Macs. Is this the case? Bruce, try the Oxford Archeology distribution of gvSIG 1.10 it is called gvSIG OA Digital Edition 2010, 1.0. and it worked on my friends Mac without any problems: ftp://88.208.250.116/gvsig-oade-2010-1.0.0-osx-installer.app.zip ftp://88.208.250.116/gvsig-oade-2010-1.0.0-osx-installer.app.zip Good Luck Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Re: fastest option of serving huge imagery on web map on the fly
Thanks all so far for the responses. Re: Bob I will check out your site more closely . And I will try to find out about dropping and adding pixels with MapServer (not familiar with that yet...) From: miblon In my opinion (but of course Karsten needs to answer that himself) he needs WMS as I think he mentioned before. I may be wrong assuming that mapproxy caches every unique wms request as a unique image. For this exercise I do not necessarily need WMS because I was pretty pleased with the zoomify layers in OpenLayers serves by IIPImage server. Oliver Tonnhofer wrote I don't understand that. MapProxy does cache square tiles and if 60TB are a valid estimate for TileCache and GeoWebCache, than this should also apply to MapProxy. Ok I was not yet familiar how MapProxy really works - from what I read it seemed not to store any physical tiles I thought (only the request parameters), but I guess that is wrong .. Karsten mentioned OpenLayers, so I guess tiled services like TMS are an option. MapProxy, TileCache and GeoWebCache should all be able to handle that without caching in advance. That could be a really viable option - only to cache what is needed and I guess my clients could scale up his infrastructure once more is needed then there likely would be also more customers to support that... MapProxy comes with full HTTP cache control, you can limit the resolution till images should be cached (other requests will be passed to the WMS) and if some clients require full WMS you can use MapProxy's WMS and benefit from the cached tiles. All points that are quite useful in this scenario. I think I will really need to read in details the doc of MapProxy's first to find out what all it can do... But essentially my initial quest was to find out what are my fastest options to render imagery (and best compressed raw imagery which takes up 5TB storage rather than uncompressed raw imagery (tiffs that would take up 60TB of space) and to render those on the fly which out caching anything tiles on disk That means with rendering engine which raw file format which output format what other considerations ... So if anyone has comments on that as well I would appreciate very much. Fort now I think the best bet I found was using jp2 imagery as raw input (carefully converted from MrSid to make them render fast aka following these instructions on this site : http://help.oldmapsonline.org/jpeg2000/), using IIPImage server and a zoomify layer in Openlayers ... Any other better (faster) options ? Cheers Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] Re: fastest option of serving huge imagery on web map on the fly
Yes. What I want to do is simply to find out the fastest options to render on the fly from raw data imagery (no tiles whatsoever stored on disk in addition to the raw data ). I will check out what SpatialCache is... Karsten -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/fastest-option-of-serving-huge-imagery-on-web-map-on-the-fly-tp5085855p5086172.html Sent from the OSGeo Discuss mailing list archive at Nabble.com. ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] fastest option of serving huge imagery on web map on the fly
Hi All, I am seeking some advice/ alternative ideas about the following project I am working on... I have been tasked with researching the best and fastest options serving huge raster datasets on a web map using OpenLayers o the fly (using all Open Source software). We want to serve the US NAIP Aerials in 1m resolution (which are a total of about 4.7 TB of MrSid/Jp2 data) on a interactive web map as an optional map background. The are using MapServer to serve our other (vector) data such as roads, rivers etc as WMS to overlay onto this. Of course there are many ways to go about this but one of the things we determined early on is that MapServer is too slow to serve compressed imagery such as the native MrSid Jp2 imagery on the fly for our needs. Thus, one option would be to spare MapServer from having to decompress the images. We can then also avoid having to convert them to tiff and adding overviews (using gdaladdo for example). This would also blow up the total data volume to something about 60 TB ... Thus, we are in the process of researching options on how to serve the compressed data as fast as possible on the fly and without the need for caching them on disk (that means no TileCache nor GeoWebCache should be used because that also would involve having to set up huge storage spaces ... One option I came about was using IIpimage server and this would then involve converting the MrSid all to Jp2 format. One advantage is that OpenLayers 2.9 already has natively the Zoomify layer support so that we can easily add the images coming out of IIPImage Server Zoomify + JPEG2000 server http://help.oldmapsonline.org/jpeg2000/ I also found that another option is the Djatoka Jpeg 2000 Image Server http://sourceforge.net/apps/mediawiki/djatoka/index.php?title=Main_Page and the J2K Tiler Renderer: http://dltj.org/article/introducing-j2ktilerenderer/. None of the above seem to enable output as WMS (correct me if I'm wrong). One draw back is that all of those above are using the Kakadu library which is great but not free for commercial use. I also wanted to research how the use of this new proxy server http://mapproxy.org/ could improve our speed in combination with e.g. IIP Image server... Anybody has experiences with any of the above or comments ? Any input what you think would be the fastest option to serve the compressed US NAIP onto a web map on the fly (without caching tiles on disk) ? Cheers Karsten ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
[OSGeo-Discuss] RE: Webinars on OS geo for local governments, schools and nonprofits?
Hi Charlie, I would be interested in this. Here is a rundown of the what I have been doing over the last year and a half: In 2008 I thought that training and support for OpenSource GIS was lacking in many ways - especially in resources dedicated to users (and not only developers). At the same time I am running a GIS consulting business (see below) and thought about the opportunities in teaching OS GIS. Thus I started into this by asking questions on GIS email lists to find out what people thought about the idea (background is that there a couple of companies offering OS GIS seminars in the US but those where pretty costly, mostly on-demand and there where (and still are) almost no scheduled training options...). I was encouraged by the feedback from various folks and convinced that there is a demand/need/interest in this and announced 2 free 90 minute webinars about OS web GIS Interoperable Web GIS Solutions with Free and Open Source Geospatial software in the Fall of 2008. The first webinar I announced on 2 general (not OS GIS or vendor specific) GIS mailing lists local to Washington and Oregon State - and within 3 days the 40 free slots where taken. After this webinar was successful I announced another one on Linked-in in the GIS group and again the seminar was full within 2 days (international crowd this time). This encouraged me to start offering a commercial version of the seminars as a 3 day (in person seminar not web) on a regular basis (2-3 times a year)- you may compare website below for more information (I don't want to make this into too much of an advertising here but to give a flavor what was done one can check there). I am very in general interested in education. Regarding OS Geospatial components I am specifically excited about resources that focus on the user perspective (which is lacking). If there is interest I could assist, contribute, cooperate on (or offer) some free webinars for the purposes outlined by Charlie below. Two more notes: CUGOS put on a half day seminar Introduction to Open Source GIS - A Practical Approach (presented by Michael Gerlek, Karsten Vennemann, Aaron Racicot, Dane Springmeyer) at WAURISA 2009 http://www.waurisa.org/conferences/2009/Workshops.html and will offer another one this year Open Source Tools for Spatial Analysis and Geoprocessing on the Desktop (A general introduction and overview about the tools covered in this workshop will be followed by examples illustrating the use of desktop utilities based on the OGR/GDAL2 libraries, PostGIS (the open source spatial database) and gvSIG (a desktop GIS) for spatial analysis and geoprocessing. During the workshop participants can use a live DVD with their own laptop to go along with some of the exercises.) http://www.waurisa.org/conferences/2010/Workshops.html Cheers Karsten Karsten Vennemann Education contact CUGOS (Cascadia chapter OSGEO) www.cugos.org Principal, Terra GIS LTD Seattle, USA www.terragis.net Date: Mon, 08 Feb 2010 09:15:00 -0500 From: Charlie Schweik cschw...@pubpol.umass.edu Subject: [OSGeo-Discuss] Webinars on OS geo for local governments, schools and nonprofits? OSGeo colleagues, I was recently contacted by Ann Deakin, a Geosciences faculty at the State University of New York - Fredonia campus. She is also on the board of directors of the NYS GIS Association and the chair of their education committee. She was asking me about the possibility of offering a webinar to their members (and anyone considering getting into GIS) on open source GIS. This sounded like a really good idea to me, as a possible new (?) way of promoting OSGeo technologies. I'm wondering if anyone has already done this kind of thing? Would any of our knowledge experts out there be willing to do such a webinar? (If so, let me know in what area) If we can get something like this designed, we could either do it first working with Ann and the NYS GIS Association, or perhaps try and scale the webinar up to a larger and more international crowd. Reactions welcome! Charlie Schweik OSGeo education chair ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
