Check out http://earth-base.org/fossils for my heat map implementation. I calculate the clusters in PL/R, and send the data to the browser as json and construct the heatmap in the browser.
I will clean up the PL/R code and publish it on my web site and post a notice on this list soon as I get some breathing time. On Mar 27, 2012, at 10:35 PM, John Callahan wrote: > The gdal_grid tool supports IDW interpolation. I've used ths for CSV files > to TIFs. Very recent versions of GDAL should be able to read/write to > postgis rasters. Check out http://www.gdal.org/gdal_grid.html > > Personally, I would love to have postgis do spatial interpolations. > However, the last I checked into this, PostGIS does not really have any > spatial interpolation methods (IDW, kriging, splines) built in. I saw some > examples of people integrating R functions into postgres pl/sql: > http://www.joeconway.com/plr/ > > - John > > *********************************************** > John Callahan, Research Scientist > Delaware Geological Survey, University of Delaware > URL: http://www.dgs.udel.edu > ************************************************* > > > > On Tue, Mar 27, 2012 at 11:20 PM, Blair Deaver <blairdea...@gmail.com>wrote: > >> Hello, >> >> I am trying to find out if PostGIS Raster supports the Inverse Distance >> Weighted interpolation method via some function. I am specifically trying >> to generate a heat map from a geometry table with point locations. Can >> some one point me in the right direction? Thanks. >> >> Cheers, >> Blair >> _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
