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
[OSGeo-Discuss] density maps
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 ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] density maps
java.. then have a look at the Sextante library. It has a density and kernel density function. It can be used with geotools and from gvSIG and has connectors to OpenJUMP. I lately worked on improving the function a bit (though - everything local by now). stefan miblon schrieb: 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 ___ 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
