Export DF world map for use in GIS tools #5376
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myk002
reviewed
Apr 4, 2025
| @@ -71,6 +71,7 @@ if(BUILD_SUPPORTED) | |||
| #dfhack_plugin(dwarfmonitor dwarfmonitor.cpp LINK_LIBRARIES lua) | |||
| #add_subdirectory(embark-assistant) | |||
| dfhack_plugin(eventful eventful.cpp LINK_LIBRARIES lua) | |||
| dfhack_plugin(export-map export-map.cpp COMPILE_FLAGS_GCC -fno-gnu-unique) | |||
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what is requiring -fno-gnu-unique?
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probably a STL template; it can be hard to figure out which one because you have to pore over the libc++ implementation and that's very timeconsuming.
-fno-gnu-unique should always be safe for DFHack plugins, as long as they don't crossload another another plug-in module
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Nothing is actually requiring this. Is what a (failed) attempt to make the plugin unload. I will have to check whether it unloads, now that I have removed the GDAL dependency. Keeping this there and the conversation open in the meantime.
ab9rf
reviewed
Apr 5, 2025
| using coord = df::coord2d; | ||
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| // static int wdim = 768; // dimension of a world tile | ||
| static int rdim = 48; // dimension of a region tile |
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should this be constexpr instead of static?
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The goal of this plugin is to export the world map at the region-tile (i.e., embark tile or midmap-tile) level for use with GIS programs like ArcGIS or QGIS. For a medium-sized map, this amounts to (129*16)^2 = 4260096 region tiles with biome information for every region tile fetched from one of the surrounding world tiles.
In order to keep the output down to a manageable size (17 MB of CSV for a medium-sized world), region tiles are clustered by the world tile they take their information from, and every cluster is exported as a single feature with its geometry described as a WKT (MULTI)POLYGON, resulting in an export of only 129^2 = 16641 features.