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rustyb/making_small_geotiffs.md

Last active April 25, 2016 18:57
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GeoTIFF making notes for MapLesotho
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making_small_geotiffs.md

First you will need to go and georeference your image. It will turn out absolutely massive, like 1.57GB.

With this image we will compress the file into a geoTiff with jpeg compression. Comes back as 45mb.

gdal_translate \
    HSPC0567_wgs84.jpg \
    out1.tiff \
    -co COMPRESS=JPEG \
    -co PHOTOMETRIC=YCBCR \
    -co TILED=YES

Now to create some overviews for this file so it can be viewed at low zoom levels.

gdaladdo \
  --config COMPRESS_OVERVIEW JPEG \
  --config PHOTOMETRIC_OVERVIEW YCBCR \
  --config INTERLEAVE_OVERVIEW PIXEL \
  -r average \
  out1.tif \
  2 4 8 16

Source -> http://blog.cleverelephant.ca/2015/02/geotiff-compression-for-dummies.html

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