Hi Gert

I did it manually (downloaded rectangle after rectangle of the border line in josm, until I found the wrong part (see attachment)).

A better and faster approach would be a query on the osm data base.

Example script to use on overpass-turbo.eu - Execute this script with a partial view of lake geneva on the map:

/*

This shows the border line of lake geneva in overpass-turbo.eu

*/

[out:json];

(

  relation[name='Lac Léman']({{bbox}})->.cr;

);

out body;

>;

out skel qt;

Then you click inside and the area of the multipolygon will be filled (don't know how it looked before the fix ;-)

I don't understand the details of the query yet and did't things like this before, but I sure will use it in the future - while refining my map style

Regards, Hanspeter

Von: thesurveyor@wolke7.net [mailto:thesurveyor@wolke7.net]
Gesendet: Montag, 5. Januar 2015 12:23
An: mkgmap-dev@lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] Lake Geneva is dry - fixed

Thank you very much, Hanspeter

I'll download the new file next night and rebuild my map. I'll keep you informed about the result.

One more question about that: how did you find the corrupt multipolygon?

I'm currently not able to find such things, but perhaps if I get some hints how to do that, I can learn it :-)

Regards,

Gert