RasterioSource Loading Warning

[ammarsdc]

Hi @AdeelH @lewfish

I'm trying to load my orthophoto like this:

from rastervision.core.data import RasterioSource
orthomosaic = RasterioSource("some_path/orthomosaic.tif")

Then this warning appeared:

rastervision.core.data.raster_source.rasterio_source: WARNING - Raster block size (32, 15500) is too non-square. This can slow down reading. Consider re-tiling using GDAL.

But if I query this orthomosaic.shape it returns (16460, 15500, 3). Seem like not having issue.

But then I tried to reverse engineering the code then found out the root of this number came by running this: set(orthomosaic.image_dataset.block_shapes). It return {(32, 15500)}.

May I know why this warning showed up? Do I need to re-tiling? If need, may I know how to do this?

Thanks!

[AdeelH]

The warning is about the block size that the GeoTIFF format uses to store the raster, not the size of the full raster.

See https://gis.stackexchange.com/questions/401818/gdal-change-band-block-size.