I've been using a raster layer as a mask and now want to expand my study area. My problem however is that I can not remember where I got the data for the mask!
The data is land areas, with coastlines matching those of the Political Ocean Network data (the is even a matching anomaly where the Saudi/Yemen border is unclear). But rather than being vector lines, this coverage is raster areas, with water as a nul value.
Can anybody suggest where I can download this data? Alternatively I can presumably produce such a raster from the vectors, but how?
I've been using a raster layer as a mask and now want to expand my
study area. My problem however is that I can not remember where I got
the data for the mask!
The data is land areas, with coastlines matching those of the
Political Ocean Network data (the is even a matching anomaly where
the Saudi/Yemen border is unclear). But rather than being vector
lines, this coverage is raster areas, with water as a nul value.
Can anybody suggest where I can download this data? Alternatively I
can presumably produce such a raster from the vectors, but how?
Use the v.to.rast module. Note the conversion of labeled areas can be
subtle.
also have a look to see if there are any meta-data notes on the raster
MASK that might give you some clues: 'r.info MASK'