July 2021 release
No new functionality introduced, but:
- waters (rivers & water bodies) and transport (roads and railroads) moved from oldish ArcČR 500 v3.3 to more current Data200 data sources, leading to somewhat improved resolution / somewhat bigger download size
- minor update of data structures resulting from the ArcČR >> Data200 data switch
- update of definition of "Major" rivers (e.g. Radbuza out, Jizera in)
- minor update of internet links to pass CRAN checks