Greg, What data format is your lat/long grid in? _____
From: [email protected] [mailto:[email protected]] On Behalf Of Greg King Sent: Monday, March 02, 2009 5:06 PM To: [email protected] Subject: [postgis-users] Postgis Spatial Interpolation Hi, I'm fairly new to postgis and spatial databases but have been very pleased with the results I'm getting from postgis to date. One of my projects is using postgis to load weather data from a 0.5 x 0.5 degree lat/long grid. I'm looking to interpolate data values that fall between that grid point I have values for. A bit of googling has revealed a number of applications that interface to postgis and can do what I need (eg GRASS), but I don't need their full functionality or the overhead of interfacing with them. My project needs simply to return interpolated values to a web page and I would rather just have a pl/pgsql procedure that gives me interpolated values for a given point. My initial thoughts are to feed the necessary point data from my database into a custom pl/R function and get R to interpolate the data for my point. However, that is going to involve a fair amount of custom code and for me to learn more about R. I don't want to reinvent the wheel, so I'd be grateful for any thoughts on solutions that meet my needs? Thanks, G PS In my googling I also saw references to PGRaster, but it looks like that's still under consideration for development in postgis?
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