This sounds like today's weather reports, but it isn't.
For some time I have been downloading the England, Scotland and Wales
files from Geofabrik, and compiling these with mkgmap.
Today, I have encountered a problem with sea flooding in SW Scotland/NW
England. Compiling Scotland alone works fine. Compiling England has a
small area of flooding around Carlisle. Compiling both together produces
a very large area of flooding in both England and Scotland.
Screenshots from mapsource for these last two are at
http://www.rogercalvert.me.uk/OSM/england.jpg
and
http://www.rogercalvert.me.uk/OSM/uk.jpg
respectively.
My command line includes
--generate-sea=multipolygon,extend-sea-sectors,close-gaps=1000,floodblocker
Has anyone else encountered this? I would appreciate any ideas as to
where to look for the problem.
Many thanks,
Roger
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Roger Calvert
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