I have a folder of GIS data that consists mainly of GeoTIFF files. The whole set weighs in at about
1.2 GB. I noticed that if I pack the contents into a tarball, it smashes down to about
82 MB. I would like to check the set into a revision control system sot it can be worked on by other people and it looks like there is some space that can be squeezed out.
The GDAL GeoTIFF driver page lists plenty of options that may be used to create compressed GeoTIFF files. There are also plenty of options that affect the way each algorithm works.
The help page does a good job at describing the options but doesn't elaborate on how to select an algorithm or the tradeoffs that are associated with the varying level of compression. This leads to the following questions:
The pros of using compression are a dramatic savings in space. What are the cons? Is information lost when the image is compressed?
How should one go about choosing an algorithm and compression level. Do some types of images lend themselves to a certain algorithm?