This macro will identify contiguous sets of polygons. It marks each polygon with the lowest ID number from among the contiguous group of polygons to which it belongs. The polygons can then be merged into districts using the "Merge By Value" function in the Maptitude GUI.
Free and open source (GPLv3 license).
A new dataset called Bedmap2 gives a clearer picture of Antarctica from the ice surface down to the bedrock below. Bedmap2 is a significant improvement on the previous collection of Antarctic data—known as Bedmap. The product was a result of work led by the British Antarctic Survey, where researchers compiled decades worth of geophysical measurements, such as surface elevation measurements from NASA's Ice, Cloud and Land Elevation Satellite, known as...