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I have a raster file (TIF file) and want to use its extent as a mask. I need this mask to be able to extract other shape files /raster files by this mask.

How can I convert my raster file to a simple mask (shp.file) regarding only the outline of my raster file?

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  • Using which software? – Spacedman Oct 4 '19 at 18:50
  • QGIS 3.6. or ArcGIS – Boing Oct 4 '19 at 20:33
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Try converting it using the Raster To Polygon tool which:

Converts a raster dataset to polygon features.

then you can use it as a Mask.

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  • but if use the Raster to Polygon option, I have also the "information" from the raster in the new polygone file. I just need the exact shape or outline to use it as a mask. how can I do that? – Boing Oct 5 '19 at 13:59
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In QGIS, you can use the Tile Index tool from:

Raster / Miscellaneous / Tile Index
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You can find the solution here. For my opinion the best solution is second. Work on vactor or raster layer.

Under Vector menu go to Research tools and you will find polygon from layer extent. Also under processing you will find that function.

In QGIS 3 use ctrl+k and start typing extent.

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  • in my QGIS ( 2.4.) version, on the menue "Vector" within the "research tools" I don t find the "polygon from layer extent", there are these options: select by location, create grid, extract layer extent, random points in extent, random points in layer bounds, random points inside polygons, random selection, random selection within subsets, regular points. It 's not the "random points inside polygons", isn't it? Where can I find this tool? – Boing Oct 5 '19 at 13:50
  • @Boing - If it's possible, update QGIS to newest version. – GSienko Oct 5 '19 at 20:25

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