[mkgmap-dev] Bridges over tidal water

Wed Aug 29 08:36:32 BST 2012

> I am using a separate coastline file to avoid local flooding problems,
> but I find that bridges over tidal water disappear in Mapsource. Without
> the coastline file, they are fine. Can anybody suggest a remedy, please?
>
> Roger

Hi Roger,

do you know if there is anything special with bridges over tidal water? 
Are there any special tags for them?

Anyhow I strongly propose to use the precompiled sea feature which is 
available since mkgmap r2307. This compiles much quicker than the 
previous methods and the results regarding flooding problems are much 
better.
You can enable it using the parameter
precomp-sea=<directory with precompiled sea tiles>
instead of the generate-sea parameter.
You can download the sea tiles from 
http://www.navmaps.eu/wanmil/sea_20120614.zip.

WanMil