[mkgmap-dev] Draw Order, Precompiled sea and Mapsource

Sat Dec 29 15:44:08 GMT 2012

I am having problems with viaducts and road bridges over tidal water not 
appearing in Mapsource, though they do appear in Basecamp and on my 
60CSx. I suspect this is a draw order problem, and it may be related to 
Precompiled Sea, and/or to my inclusion of a GBGrid file.

I gather Mapsource draw order depends on Mapname. Does the Precompiled 
Sea have a Mapname built in to mkgmap? Or can/should it be given one? Is 
it transparent? Should it appear before or after other input files?

Some combinations of input show the bridges but not the grid lines where 
they cross the sea, others show the gridlines but not the bridges. 
Transparent seems to make no difference. The only sequence I have found 
which shows both grid lines and bridges over sea is:

mapname:60000002
description: Grid-File
input-file: GBGrid.osm
precomp-sea=..\resources\sea
mapname: 60000001
description: GB-Carlisle
input-file: 60923011.osm.pbf

input-file: ..\resources\style.txt

Any guidance would be welcome.

Thanks,
Roger
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Roger Calvert
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