Hi Felix, if you created the map with the extend-sea-sectors option this may help you. Previously I ignored that a distance in longitude drection depends on the latitude. One degree on equator is same for longitude and latitude, while one degree at a pole is zero. The attached patch does this correction. So if using the data you posted in your first mail, the additional point is drawn on western border of tile instead of going to north and cutting the real coastline. Nevertheless this behaviour may occur again if the size of the tile changes. Like WanMil wrote the only possibility to get rid of this is to have the exact borders of the extract stored in the osm data and move them to the generated maps. Am 20.01.2010 11:55, schrieb Felix Hartmann:
On 20.01.2010 11:12, Clinton Gladstone wrote:
2010/1/20 Felix Hartmann <extremecarver@googlemail.com <mailto:extremecarver@googlemail.com>>
Just downloaded new data for Germany, problem persists:
Is this maybe not solvable with current code? I'll retry with different max-nodes to see if it then maybe works.
I also noticed this with the Geofabrik extract of Germany: The tile around Bremen always gets flooded. My tiles are different from yours, so I assume we have different max-nodes parameters.
I did also compile Geofabrik's complete Europe extract: here the problem did not occur. There were a couple of other landlocked tiles in France and Poland which were flooded though (caused by, I assume, some bad data in the tiles).
This may mean, therefore, that the problem stems from the way Geofabrik extracts Germany. You could try making your own extract (using a bounding box) for Germany out of the Europe extract. Perhaps this would work better.
Cheers. -- I reduced maxnodes to 800.000 and then the flooding became a lot smaller (and not the whole tile anymore). The problem seems to be that there is sea in the North, then a section with land until the boarder, and then further south again sea. See below (or to the right) a screenshot of Garmin (Mapsource) Topo Deutschland v2. One can nicely see the problem of the country boundary going seperated through the sea. It is really strange that there is a sea section without exit on dutch territory. But well.
I don't know whether this can be fixable in code, or whether we should simply take it out from the main ocean and make a separate sea section in OSM data to make it easier to work with country extracts.
