Interesting post in https://www.linkedin.com/pulse/advancing-future-open-geospatial-t-kartor-tvxie/ showing a collaboration that lead to improvements in GDAL, to address topics that used to be reserved to proprietary specialized commercial software. To the best of our knowledge, GDAL is now the only open source implementation of a CADRG writer. T-Kartor is an example of contributor at several levels: sponsor of the GDAL sponsorship program, direct code contributor and hiring GDAL experts. Effective open-source is all about active participation.
