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use /Query rest api to interrogate a raster in a map service

Question asked by scaddenp on Apr 6, 2017
Latest reply on Apr 6, 2017 by fcbassongis

I know you can use Identify to fetch the raster value under a point. Identify needs map bounds and pixel widths which are inconvenient to fetch in my context. I have point or rectangle in world coordinates. It seems it should be possible to ./query but in all my attempts I just "Error 400: invalid or missing parameters". Identical parameters are fine on a polygon layer. Its rasters that comes unstuck.

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