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hunzikp / velox

https://hunzikp.github.io/velox/
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Error during line extract / rasterize #18

Closed chschoenenberger closed 6 years ago

chschoenenberger commented 6 years ago

Hi Philipp

The package sounds really promising after working with a rather large dataset and the raster package being terribly slow. Unfortunately, I was not able to use it though. I have a large SpatialLinesDataFrame (~84'000 Elements) and I'd like to extract values from a digital elevation model of Switzerland (7972 x 18545 cells). I tried to do it with a subset first, but I always got the same error:

Error in boostFactory$makeBoxGrid(origin = origin, dim = dim, res = res) : 
  std::bad_alloc

The same happenes when I try to rasterize the line (for a subsequent raster overlay). Did you encounter this before or do you know how to resolve it? If you wish some test data you can contact me by email: christoph.schoenenberger@uzh.ch.

Thanks for the great work.

Best regards, Chris

hunzikp commented 6 years ago

We discussed this bilaterally and it turns out that the issue was insufficient RAM. This is not technically a bug, so I'm going to close this issue. However, I'll keep memory management on my to do list.