Re: [Qgis-user] Heatmap or cloropleth? How to build one like this with QGis?
Dear Marcelo, This might help you understand your problem and also how to do heatmap in QGIS. http://www.gislounge.com/difference-heat-map-hot-spot-map/ Regards, Abdishakur On 24 Jul 2015 02:09, Marcelo de Moraes Serpa celose...@gmail.com wrote: Does anyone know how I could render a heatmap like this one, with QGis? http://i.stack.imgur.com/DvVyU.png (You can also see the actual heatmap here: http://bit.ly/1gPqHEi) I'm not sure if this is a heatmap or a cloropleth, so that makes searching for the right information harder, hence I couldn't find a plugin or tutorial yet that would help me render something like this. If someone could enlighten me, I'd be very grateful! Thanks, -- Marcelo. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] QGis GMesh
Dear Users, I use Gmsh (GMesh, automatic mesh generator) to draw a triangular finite element mesh to be used by a 2 or 3D hydrodinamic model (shallow water equation model). Gmsh write the mesh in differrent formats, most of them to be loaded in 3D CAD modeller (mechanical usage). The simplest format is a text file (.msh) easly understandable, basicly the list of nodes in the first part of the file, then the list of elements, each of them with the 3 nodes. I wonder if anyone has suggestions how to import in QGis this file, or if there is a tool for this porpouse. Thanks a lot everyone. best Regard Francesco -- Francesco Maicu ISMAR - CNR Arsenale Tesa 104 - CASTELLO 2737/E 30122 Venezia Italy tel. +39 041 2407944 fax +39 041 5207940 e-mail: francesco.ma...@ve.ismar.cnr.it skype: checcomex - ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGis GMesh
Hi! I am pretty sure you already know about the crayfish plugin for QGIS .. which tries to do exactly these things for hydrodynamic modelling. The first thing is - do you need that mesh as a shape or do you want to render results? Second thing - I am quite sure it is possible to implement loading of these msh files either inside crayfish or through a plugin. I suggest you to get in contact with the crayfish developers (lutraconsulting - http://www.lutraconsulting.co.uk/) and ask if and how it would be possible to implement loading this mesh. kind regards Werner On Fri, Jul 24, 2015 at 11:23 AM, francesco.ma...@ve.ismar.cnr.it wrote: Dear Users, I use Gmsh (GMesh, automatic mesh generator) to draw a triangular finite element mesh to be used by a 2 or 3D hydrodinamic model (shallow water equation model). Gmsh write the mesh in differrent formats, most of them to be loaded in 3D CAD modeller (mechanical usage). The simplest format is a text file (.msh) easly understandable, basicly the list of nodes in the first part of the file, then the list of elements, each of them with the 3 nodes. I wonder if anyone has suggestions how to import in QGis this file, or if there is a tool for this porpouse. Thanks a lot everyone. best Regard Francesco Francesco Maicu ISMAR - CNR Arsenale Tesa 104 - CASTELLO 2737/E 30122 Venezia Italy tel. +39 041 2407944 fax +39 041 5207940 e-mail: francesco.ma...@ve.ismar.cnr.it skype: checcomex - ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS 2.10 with / without GRASS 6.4.3
On Fri, Jul 24, 2015 at 9:14 AM, Chris Buckmaster chris.buckmas...@runnymede.gov.uk wrote: I am on Windows Vista 64 bit - I downloaded the windows 64 bit installer file from qgis.org The only difference is that QGIS Desktop 2.10.1 with GRASS 6.4.3 loads GRASS 6 provider + plugin while QGIS Desktop 2.10.1 does not. No big gain running the version without GRASS, probably few tenths of second on start. I am not win package maintainer so I am not sure why there is the version without GRASS. BTW: GRASS 7 is not yet ported to win 64 bit. Radim Chris -Original Message- From: Radim Blazek [mailto:radim.bla...@gmail.com] Sent: 23 July 2015 20:06 To: Chris Buckmaster Cc: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] QGIS 2.10 with / without GRASS 6.4.3 On Thu, Jul 23, 2015 at 1:33 PM, Chris Buckmaster chris.buckmas...@runnymede.gov.uk wrote: Hi there I have installed the new version of QGIS but notice it now comes with two different desktop applications; one with and one without GRASS 6.4.3. Is there any reason for this and should I be using each of them depending on what I am wanting to carry out? Just a bit confused with which one to use. Which platform, which package? If it is from OSGeo4W, there are two batch files (the QGIS application is the same) which start QGIS either with GRASS 6 or GRASS 7 (you have to manually select GRASS 7 package in OSGeo4W setup if you want to use QGIS with GRASS 7 provider). Radim Thanks ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] vector reclassification error
Hello, I am Geo spatial computer science research student and wanted to use QGIS in my work. I am trying to re-classify a vector shape file using v.reclass(grass algo) (processing toolbox). I am facing an error stating 'either rules or col must be specified'. I want to use only rules file, however there is no way to unselect the column option. Kindly help me with it. Regards, jyoti misra ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Heatmap or cloropleth? How to build one like this with QGis?
Sorry for posting again. My message was held for moderation because it surpassed the 100kb limit it seems, probably because it included the other messages in the history of replies. Here it goes again, without the previous replies... --- Thank you all for the replies! It means, that in order to get that effect you need to use the Heatmap Plugin, which is not a live map renderer from the point data but generates a TIFF file on disc which you can then style as you want. @Andreas: thanks! I tried the Heatmap plugin, actually, but couldn't get the output to look the way I wanted. I noticed it saved the TIFF file, but I don't know much about the format. When you say that I can style it the way I want, how could I do that? @Abdishakur: Thanks for the article! That's somewhat how I want to render the heatmap, in fact: http://www.gislounge.com/wp-content/uploads/2014/08/fortune1000-heat-kernel-us.png. I couldn't find the description of this actual rendering in the article though, it was too broad. But maybe I'm missing something? @Richard, Sorry I forgot to mention what's the data I'm dealing with. The maps will potentially deal with tens of thousands of points representing real-state listings in a city, so, lat,long and a value that represent the revenue per month. More revenue, hotter, less revenue, colder. For this specific Heatmap experiment, I'm have ~1000 points to play with, and I'm loading them from PostGIS, so when importing those points, I converted the lat,lon to a Point, so answering your observation, yep, I do have the points. They look like this: http://bit.ly/1SGfPnY. I see that grid interpolation has an inverse distance algorithm for the interpolation, which is exactly the one I want. The question that remains is - how could I set it up/style it so that it looks more organic like the original example I sent (likehttp://bit.ly/1MpOaIh this or http://bit.ly/1GLlMsU)? Thank you all, again! On Thu, Jul 23, 2015 at 6:08 PM, Marcelo de Moraes Serpa celose...@gmail.com wrote: Does anyone know how I could render a heatmap like this one, with QGis? http://i.stack.imgur.com/DvVyU.png (You can also see the actual heatmap here: http://bit.ly/1gPqHEi) I'm not sure if this is a heatmap or a cloropleth, so that makes searching for the right information harder, hence I couldn't find a plugin or tutorial yet that would help me render something like this. If someone could enlighten me, I'd be very grateful! Thanks, -- Marcelo. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Blank square appears when using basemap
Hi All, I keep getting an annoying (and time-consuming!) white square appearing in my map view when I use a basemap. I can get it to go away, generally, by changing the scale of view or turning items on and off in the table of contents, but it often just reappears and won't go away. Does anyone else have this problem, and have you cracked it? I attach a screenclip of the problem. Thanks a mil. Susan ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Blank square appears when using basemap
Hi, Looks to me like the tiles from bing are not loaded during print time. I remember that fumbling in the settings-options-network made a difference with this kind of problems in the past. Not sure at all, but increase the value for time out (just add a zero) and also increase the max retry ... value. Maybe also increase the cache size (add zero) , but I'm not sure att all if those services are influenced by these values anyway. Others with better insight, please correct me. Cheers Bernd Am 24.07.2015, 20:24 Uhr, schrieb Susan Iremonger s.iremon...@gmail.com: Hi All, I keep getting an annoying (and time-consuming!) white square appearing in my map view when I use a basemap. I can get it to go away, generally, by changing the scale of view or turning items on and off in the table of contents, but it often just reappears and won't go away. Does anyone else have this problem, and have you cracked it? I attach a screenclip of the problem. Thanks a mil. Susan -- Bernd Vogelgesang Siedlerstraße 2 91083 Baiersdorf/Igelsdorf Tel: 09133-825374___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Blank square appears when using basemap
This is a pretty well known issue: http://hub.qgis.org/issues/5827 On Fri, Jul 24, 2015 at 2:48 PM, Bernd Vogelgesang bernd.vogelges...@gmx.de wrote: Hi, Looks to me like the tiles from bing are not loaded during print time. I remember that fumbling in the settings-options-network made a difference with this kind of problems in the past. Not sure at all, but increase the value for time out (just add a zero) and also increase the max retry ... value. Maybe also increase the cache size (add zero) , but I'm not sure att all if those services are influenced by these values anyway. Others with better insight, please correct me. Cheers Bernd Am 24.07.2015, 20:24 Uhr, schrieb Susan Iremonger s.iremon...@gmail.com: Hi All, I keep getting an annoying (and time-consuming!) white square appearing in my map view when I use a basemap. I can get it to go away, generally, by changing the scale of view or turning items on and off in the table of contents, but it often just reappears and won't go away. Does anyone else have this problem, and have you cracked it? I attach a screenclip of the problem. Thanks a mil. Susan -- Bernd Vogelgesang Siedlerstraße 2 91083 Baiersdorf/Igelsdorf Tel: 09133-825374 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Organic heatmap outter contour, and making it look better
Thanks to @Neumann, @Abdishakur and @Richard from my previous thread, the info was valuable! I did reply the post with some additional questions it but for some reason the mailing list server bounced my messages. They are not so relevant anymore, but if you get them, I'd still want to know your opinions. Anyway, I played a couple of hours today with the data I have and with the interpolation and countours features of QGis (which seems to use Gdal under the cover, which was, for me, a quite interesting finding! That means that any result I get with QGis could easily be scriptable, which is a must, since it will eventually be used in a web app pipeline) and I got this: https://www.dropbox.com/s/9ig76n1kcxoo76w/Screenshot%202015-07-24%2021.39.00.png?dl=0 It still doesn't look quite like I want*[0] but I'm getting there. The countours feature seems to be what I want. The numbers, by the way, is revenue per day in a certain area. The colors are not quite right (too many of them) so I need to tweak the styles, I think, and I don't want the actual countours lines to appear. They all seem to be simple problems to solve, but if you know how to do them, I'd love to know! What seems to be more complicated, is how to create an organic feeling to the map. I don't want it to be a square, like this, I want the edge to follow the outter points. Here's what I mean: https://www.dropbox.com/s/k6na766a4ox1ngg/Screenshot-2015-07-15-21.47.55.jpg?dl=0. Does anyone have any idea of to do this? Thanks! -- Marcelo. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] problem scaling labels in Qgis 2.10
On the other hand, while setting your labels sizes and positions you should set the map canvas scale to the one that will be used in the Print Composer. This, will ensure that you have an exact notion of the relative size and position of all features and labels the way they will came out of the composer's output. Hope it helps. Alexandre Neto Em qui, 23 de jul de 2015 às 17:46, Donovan Cameron sault@gmail.com escreveu: You can set the label size to map units (ie, metres) instead of font pt. That should help with scaling. Donovan On 23/07/15 09:31 AM, Richard McDonnell wrote: Try viewing the data in the canvas in the same scale as you wish to view it in the composer, you may also try to use data defined label placing, for the troublesome ones. Regards, Richard. On 23/07/2015 11:58, Rachel Brouwer wrote: I'm currently using Ubuntu - QGis 2.10.0 Pisa. When using the print Composer I have discovered my labels (size 8) are all of sudden a whole lot bigger and for this reason overlapping. How can I make sure that the size stays the same after going into the print composer? ___ Qgis-user mailing listQgis-user@lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/qgis-user OPW - Ag féachaint don am atá le teacht - Ag caomhnú ón am atá thart OPW - Looking to the future - Caring for the past http://www.opw.ie/ Email Disclaimer: http://www.opw.ie/en/disclaimer/ ___ Qgis-user mailing listQgis-user@lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/qgis-user -- Kind regards, Donovan ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Organic heatmap outter contour, and making it look better
Ops, forgot to include the reference heatmaps here. The goal is to get it to look +- like the ones below: * http://www.gislounge.com/wp-content/uploads/2014/08/fortune1000-heat-kernel-us.png and/or * http://i.stack.imgur.com/DvVyU.png Cheers, -- Marcleo. On Fri, Jul 24, 2015 at 9:58 PM, Marcelo de Moraes Serpa celose...@gmail.com wrote: Thanks to @Neumann, @Abdishakur and @Richard from my previous thread, the info was valuable! I did reply the post with some additional questions it but for some reason the mailing list server bounced my messages. They are not so relevant anymore, but if you get them, I'd still want to know your opinions. Anyway, I played a couple of hours today with the data I have and with the interpolation and countours features of QGis (which seems to use Gdal under the cover, which was, for me, a quite interesting finding! That means that any result I get with QGis could easily be scriptable, which is a must, since it will eventually be used in a web app pipeline) and I got this: https://www.dropbox.com/s/9ig76n1kcxoo76w/Screenshot%202015-07-24%2021.39.00.png?dl=0 It still doesn't look quite like I want*[0] but I'm getting there. The countours feature seems to be what I want. The numbers, by the way, is revenue per day in a certain area. The colors are not quite right (too many of them) so I need to tweak the styles, I think, and I don't want the actual countours lines to appear. They all seem to be simple problems to solve, but if you know how to do them, I'd love to know! What seems to be more complicated, is how to create an organic feeling to the map. I don't want it to be a square, like this, I want the edge to follow the outter points. Here's what I mean: https://www.dropbox.com/s/k6na766a4ox1ngg/Screenshot-2015-07-15-21.47.55.jpg?dl=0. Does anyone have any idea of to do this? Thanks! -- Marcelo. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
