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raster size limit? #17

@olenaboiko303

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@olenaboiko303

Is there a friction raster size limit to process with gdistance?
When I run the tool on a 4801x4381 raster, I produce the expected output. When I run it on a friction surface with 9295x12929 size, the output is still being produced (I use HPC resources to have enough memory, I used 256Gb) but it's completely wrong (for example, the pixel which fell into one of the targets is expected to have 0 for travel time output, but I'm seeing 8574.740234 value).

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