[postgis-users] Help finding information on creating a "Heat Map"

[Brent Pedersen]

if you can use python, this is very fast and simple but customizable as needed:
http://code.google.com/p/griddata-python/
takes arrays of x,y,z points and interpolates a grid via natural neighbor.
you can then use matplotlib (+ matplotlib's basemap ) to plot. or gdal
can read the resultant python numpy arrays directly so you could
convert to a tiff or whatever format.

-brent

On 8/24/07, Woody Woodring <george.woodring at iglass.net> wrote:
>  Thanks for the info, but I had looked at theses earlier.  They require that
> I ship the data to them, which is out of the question due to size and
> confidentiality agreements.
>
> I was looking to do the work in-house, more so that I could learn something
> in the process.
>
> Thanks,
> Woody
>
> -----Original Message-----
> From: postgis-users-bounces at postgis.refractions.net
> [mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of
> volunteer at spatiallink.org
> Sent: Thursday, August 23, 2007 5:01 PM
> To: PostGIS Users Discussion
> Subject: RE: [postgis-users] Help finding information on creating a "Heat
> Map"
>
> http://www.geoiq.com/
> sincerely
> siva
>
> -------- Original Message --------
> Subject: [postgis-users] Help finding information on creating a "Heat Map"
> From: "Woody Woodring" <george.woodring at iglass.net>
> Date: Thu, August 23, 2007 4:52 pm
> To: <postgis-users at postgis.refractions.net>
>
> I am looking for information/advice on creating a "surface theme layer"
> or
> "Heat map layer" on my map.
>
> I currently have my data stored as points in Postgres/Postgis database and
> need to output as continuous color gradation layer on Google maps. My
> current uninformed thinking is as follows:
>
> 1) Convert the point info into some other spatial representation in the
> database
> 2) Use GeoServer to create a WMS layer using the new representation.
>
> Any advice would be greatly appreciated.
>
> Woody
>
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