In QGIS, how to clip a raster with a polygon mask, but keep the outer edge cells of the raster touching the mask?
In other words: how to create a one raster cell outer buffer for the masking polygon?
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solved it by creating a buffer first as @Joseph suggested. To get buffer:
ogr2ogr.exe "\"[temporary file]\"" 1402.shp 1402 -dialect sqlite -sql "SELECT ST_Buffer( geometry , 0.001 ),* FROM '1402' "
where, 1402.shp is my mask shapefile and 0.001 is my buffer distance.