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I use QGIS and I has two layers: one with point objects (more than 1000) and one with surface (it is a version of DCW). I want compute altitude of all points. Basically, I want to get an array where every objects from the first layer comes with its altitude. Please recommend the most handy way to accomplish this result.

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The process you're describing is called point sampling, and there's a QGIS plugin called Point Sampling Tool which you can download from the plugin manager. enter image description here

Make sure that the point layer and the raster have the same CRS

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