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I would like to obtain the information of a raster layer at some points. Apparently the Point sampling tool does the job. I have used this tool, and all the raster values extracted at specific points are NULL... Both vector and raster layer are in the same CRS. I use QGIS 2.0.i in Windows 8.1. Any clue ?

By the way, does anybody knows how the raster value is computed by this tool = Is it interpolated ? or is it the closest raster value to the point coordinate ? )

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What dataset type is your raster (e.g. tif, jpg, MrSID, jp2)? –  artwork21 May 1 at 16:51
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Use the Coordinate Reference System (CRS) of the raster image.

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Welcome to GIS SE! Normally "about a paragraph" is considered minimum length for an answer (or question) here so I recommend that you edit your question to explain briefly how your answer addresses the asker's question. –  PolyGeo 19 hours ago
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