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FAQ
Why are there some "bumpy" runways?
This is likely caused by an issue with the OSM data resulting in the airfield not being appropriately flattened. To fix this, encode its boundary as a closed way on OSM (don’t forget to add the tag ”aeroway”=”aerodrome”, then (optional but recommended) one tag for its name and one for its ICAO code). Pay attention to reuse as much as possible existing OSM nodes, and to close the way.
Why is one of the tiles completely filled with water?
There is likely an incorrectly tagged feature in OSM as a coastline in an area where it does not exist. To fix this, you can manually open the OSM coastline file in the JOSM application, delete the incorrectly placed coastline and re-build the tile. The OSM coastline file is located in Ortho4XP/OSM_data/tile_folder/specific_tile/*_coastline.osm.bz2. To prevent issues for future users, you should also submit a change to OSM.
Why do some of my orthophotos have white squares?
This is due to a server issue of the orthophoto provider. Delete the orthophotos and try rebuilding the tile.