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mbostock

Gray Earth

The Natural Earth Gray Earth raster data set, reprojected to the U.S. National Atlas projection (a rotated Lambert azimuthal equal-area projection) via gdalwarp.

gdalwarp \
  -r lanczos \
  -ts 960 0 \
  -t_srs EPSG:2163 \
  -te -2100000 -2200000 2600000 750000 \
  GRAY_HR_SR_OB_DR.tif \
  shaded-relief.tiff