On Tue, Jan 8, 2013 at 3:14 PM, Chris Haste <cha...@airdata.co.uk> wrote:
> Hi Andrea,****
>
> ** **
>
> I’m not sure I understand. Are you saying that I don’t have a sufficient
> number of points in my data? I have a regular grid of points covering the
> entire globe at 1.25 x 1.25 degree intervals. Is this not dense enough?
>
I'm saying a heatmap shows a color based on the different concentration of
points, not their value, so if the grid is regular it's normal that
you get a solid color.
If you want to interpolate a value contained in the attributes of the
points instead you have to use the Barnes surface instead.
See some docs here: http://suite.opengeo.org/docs/cartography/rt/barnes.html
Cheers
Andrea
> ****
>
> ** **
>
> *From:* andrea.a...@gmail.com [mailto:andrea.a...@gmail.com] *On Behalf
> Of *Andrea Aime
> *Sent:* 08 January 2013 14:09
> *To:* Chris Haste
> *Cc:* geoserver-users@lists.sourceforge.net
> *Subject:* Re: [Geoserver-users] gs:Heatmap problems****
>
> ** **
>
> On Tue, Jan 8, 2013 at 3:03 PM, Chris Haste <cha...@airdata.co.uk> wrote:*
> ***
>
> Hi List,****
>
> ****
>
> I have been trying to use the new heatmap transformation in version 2.2.3
> but I think I must be doing something wrong.****
>
> I wish to display a layer defined using an SQL view. The query simply
> returns a Grid of points and for each point there is a temperature value, I
> am using the round function in the query to round the temperature value to
> the nearest integer.****
>
> ****
>
> I am using the SLD below, copied from the example and modified to
> (hopefully) work with my data. However, the entire map is produced in one
> colour (#FFFF00) but when I query the map by clicking on it in an
> Openlayers preview it shows correct values for the Temperatures and
> different locations on the map yield different values.****
>
> ****
>
> Any ideas?****
>
> ** **
>
> Heatmaps are about point density, if you want to interpolation function
> you should look at the Barnes surface transformation****
>
> instead****
>
> ** **
>
> Cheers****
>
> Andrea****
>
> ****
>
> ** **
>
> -- ****
>
> ==****
>
> Our support, Your Success! Visit http://opensdi.geo-solutions.it for more
> information.****
>
> ==****
>
> ** **
>
> Ing. Andrea Aime ****
>
> @geowolf****
>
> Technical Lead****
>
> ** **
>
> GeoSolutions S.A.S.****
>
> Via Poggio alle Viti 1187****
>
> 55054 Massarosa (LU)****
>
> Italy****
>
> phone: +39 0584 962313****
>
> fax: +39 0584 1660272****
>
> mob: +39 339 8844549****
>
> ** **
>
> http://www.geo-solutions.it****
>
> http://twitter.com/geosolutions_it****
>
> ** **
>
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==
Our support, Your Success! Visit http://opensdi.geo-solutions.it for more
information.
==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
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