Re: [OSGeo-Discuss] density maps
miblon wrote: Hi there folks, I am currently investigating the open source options for generating density maps. I currently have some php code that could form the bases to do this, but I would prefer to use more general available api's such as geotools if that would be possible. From a j2ee developers point of view; I am looking for functionality that I can feed with a dataset of irregular point(jts) geometry and that will generate a layer like the one shown here: http://2.bp.blogspot.com/_ZSuJiQ9ztA8/SmIM9yD-tYI/BlM/FOyoqcie7Cc/s1600-h/Shootings+heat+map+Baltimore+July+2009.jpg or http://rbnhw.com/media/epp-ShakeProbability.jpg preferably, the image should be georeferenced so it can be handled as wms, but the latter I can fix. Any ideas or references on where to look would be great! kind regards, Milo van der Linden I believe this implementation is done with Postgis not sure what else http://www.walkscore.com/rankings/San_Francisco The creator of that site lurks here too, and I can put you in contact for the specifics. Alex ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
RE: [OSGeo-Discuss] density maps
Hi, I developed some code that would do this. I called it Geographically Weighted Statistics and it relies on another library I developed called Grids. You can find these via the following URLs: http://www.geog.leeds.ac.uk/people/a.turner/src/andyt/java/gws/ http://www.geog.leeds.ac.uk/people/a.turner/src/andyt/java/grids/ Best wishes, Andy http://www.geog.leeds.ac.uk/people/a.turner/ -Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Alex Mandel Sent: 07 January 2010 10:46 To: OSGeo Discussions Subject: Re: [OSGeo-Discuss] density maps miblon wrote: Hi there folks, I am currently investigating the open source options for generating density maps. I currently have some php code that could form the bases to do this, but I would prefer to use more general available api's such as geotools if that would be possible. From a j2ee developers point of view; I am looking for functionality that I can feed with a dataset of irregular point(jts) geometry and that will generate a layer like the one shown here: http://2.bp.blogspot.com/_ZSuJiQ9ztA8/SmIM9yD-tYI/BlM/FOyoqcie7Cc/s1600-h/Shootings+heat+map+Baltimore+July+2009.jpg or http://rbnhw.com/media/epp-ShakeProbability.jpg preferably, the image should be georeferenced so it can be handled as wms, but the latter I can fix. Any ideas or references on where to look would be great! kind regards, Milo van der Linden I believe this implementation is done with Postgis not sure what else http://www.walkscore.com/rankings/San_Francisco The creator of that site lurks here too, and I can put you in contact for the specifics. Alex ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] density maps
-Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Alex Mandel Sent: 07 January 2010 10:46 To: OSGeo Discussions Subject: Re: [OSGeo-Discuss] density maps miblon wrote: Hi there folks, I am currently investigating the open source options for generating density maps. Youa can also do that easily with QGIS and/or GRASS. -- Paolo Cavallini: http://www.faunalia.it/pc ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] density maps
Milo, re ... I currently have some php code that ... I'm collecting (scavenging!) PHP code taht will help me put together a rather lightweight PHP-based tile capability, without relying on any of the geo servers that are available. So if yr code might help me in this, any bits, snippets, files you might send offline to me at shoreas at gmail.com wd be greatly appreciated. Thanks, A. Shore Annapolis, MD On Thu, Jan 7, 2010 at 12:40 AM, miblon mob...@dogodigi.net wrote: Hi there folks, I am currently investigating the open source options for generating density maps. I currently have some php code that could form the bases to do this, but I would prefer to use more general available api's such as geotools if that would be possible. ... ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
RE: [OSGeo-Discuss] OSGEO projects and Python 3.x
Dave, I know I had some problems getting Python 3.X to work on my Windows XP computer a couple of weeks ago. I had no problems with the previous release of Python. Landon Office Phone Number: (209) 946-0268 Cell Phone Number: (209) 992-0658 -Original Message- From: discuss-boun...@lists.osgeo.org [mailto:discuss-boun...@lists.osgeo.org] On Behalf Of Dave Sampson Sent: Sunday, January 03, 2010 8:46 AM To: discuss@lists.osgeo.org Subject: [OSGeo-Discuss] OSGEO projects and Python 3.x Hey Folks, I am wondering what, if any, projects are preparing or planning for a move to support python 3.x. Due to it being a major release I understand it does not come with backwards compatibility, however there are some tools out there to help with this. and of course there is surely to be lots of hands on tweaking. This also raises questions about projects using jython as it just released Jython 2.5.1 in september of 2009. If there are projects moving towards this assume there are libraries that will also have to create bindings and such. with the Public Address Geocoder project (http://www.pagcgeo.org/) I just created python bindings for the library. I am wondering if I should go ahead with python 3.x bindings. Using SWIG this should not be a challenge. so what are people doing with python 3? Cheers ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss Warning: Information provided via electronic media is not guaranteed against defects including translation and transmission errors. If the reader is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this information in error, please notify the sender immediately. ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Re: Will there be an OSGeo Desktop shootout atFOSS4G 2010?
Hi Simon. In a FOSS4G tutorial we went through the desktop GIS applications included on the Live DVD and created the same map* in each one by way of introduction: - http://snapshots.dist.codehaus.org/udig/livedvd/ It was very educational for me and would probably create an excellent set of videos. Jody *The only exception is grass where Hydrologis was kind enough to provide an introduction using slightly different data. On Mon, Dec 21, 2009 at 9:23 AM, Simon Cropper (Botanicus Australia Pty Ltd) scrop...@botanicusaustralia.com.au wrote: I agree with Stefan. I have found comparison tables of little use as the compiler has to summarize what is probably quite complex routines. They rarely give a potential user like myself the complete picture. My view has been that the only way to evaluate the usefulness of a program is to use it on actual data trying to do actual things. I have tried multiple OS GIS packages and they all do different things in different ways. Some useful some novel (to me). What really counts is if you can use one program to complete your normal workflow without needing to use other packages. I am not saying that someone should not use multiple packages during their normal work week only that you should be able to do your normal work without having to transfer data (and half the time actually convert data) between various packages to get what you need done. So from my point of view projects should not look at other projects, developers should not list functionality of their program or any other combination. Users should provide standard workflow tasks -- repetitive tasks sequences they complete regularly. Then be asked to complete those tasks on each of the programs being tested. Then the users rate ease of setup, ease of use, suitability of output, support, etc. The actual list of user experience ratings can be knocked up by an overview committee. This committee could also vet the users who put their hand up to ensure a good spectrum of users and tasks, from different sections of society (academic, commercial, newbie) are all represented and no bias exists. If developers think this might be too harsh (as users may not fully understand what is going on or how the program works), maybe a middle ground would be that the developers submit a solution to these workflow processes. The users follow these instructions and evaluate the outcome. This avoids users baulking at some quite eccentric GUI interfaces or program setup (solution must provide clear setup instructions for Windows and Linux). These solutions are tried and reviewed by the user. The workflows, results, comments and developer solutions can be collated onto one site (the OSGeo site seems appropriate) as a valuable resource for developers and user alike. Cheers Simon Simon Cropper Botanicus Australia Pty Ltd PO Box 160, Sunshine, Victoria 3020. P: 9311 5822. M: 041 830 3437. mailto: scrop...@botanicusaustralia.com.au web: www.botanicusaustralia.com.au Stefan Steiniger wrote: Hei all, thanks for Cameron on keeping me in the loop, and to Markus for remembering :) I am now subscribed to this list. I think Pauls idea sounds interesting - because this whole comparison thing is a) quite cumbersome when we have 10 desktop GIS (+ X), and b) neither really worth because desktop GIS are used for a multitude of tasks, while web map Servers or databases aren't that much - right? So as Paul is quoted on the osgeo wiki: one needs to set up use cases first (just wrote that today in a new article too, which contains a section on selecting free GIS software). And I also discovered that just most of the projects have a different focus during my evaluation. Which of course does not mean that such thing should not be presented - but it must be focussed in some way or the other to have a benefit. And as a side note, I am not sure if measuring processing times makes sense either, as GIS analysis feature sets are so different. However, I am in for testing with OpenJUMP. Two more notes: - my comparison tables are now already 2 years old now (from 2007), i.e. need some update (but the last pub in Ecological Informatics took into account newer developments too, but is superficial and focused towards the average GIS users). - I gave a talk about this at OGRS: http://www.ogrs2009.org/doku.php?id=keynotes pdf can be downloaded from there. cheers from Germany right now (Xmas) stefan PS: I know also of this comparison by T. Hengl et al. on Grass vs. SAGA for Geomorphologic Analysis http://www.igc.usp.br/pessoais/guano/downloads/Hengl_etal_2009_gmorph.pdf Paul Ramsey schrieb: Interested in a different approach that is lower impact, but still interesting and entertaining? Have developers review a competing project and then present their findings, in the form of What I love about ___, what I hate about. Jody Garnett presents What I love about QGIS, what I
