[mapserver-users] Identify for raster data?

[Steve Lime]

We'd simply need a msGetClosestPixel() function for each supported
raster type. Perhaps a msGetPixelWindow() would make more sense
then a few metrics could be calculated. With that function I could
easily roll a result set. Of course we need time to write those functions.
(ideas Frank?).

Steve

Armin Burger wrote:

> Hi all,
>
> I was wondering if there's the possibility to use identify on raster layer.
> That is, to click on the map and get back the pixel value. There's the
> possibility to classify raster data with the [pixel] tag. I tried this
> including [pixel] instead of the field name of a shapefile in the query
> template. But I only got back the error
>   msOpenSHPFile(): Unable to access file. (slope_perc.tif)
> With GDAL I think it should be possible to use Arc/Info grid  without
> converting it to an image but I assume the identify will not work either.
>
> Is there another possibility for Identify raster or is it maybe planned in
> the future? (A workaround to convert the grid to shapefile produced a shape
> with 2.5 million polygons, but I will see how this works with MapServer)
>
> Thanks for any help
>
> Armin
> --
> Armin Burger
> Territorium Online
> Siemensstrasse/Via Siemens 19 - 39100 Bozen/Bolzano - Italia
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