Am 17.12.2010 16:49, schrieb Felix Hartmann:
On 17.12.2010 16:45, WanMil wrote:
Thanks Felix, I tested it now with: extend-sea-sectors,close-gaps=6000,floodblocker,fbgap=60,fbthres=200,fbratio=0.6,land-tag=natural=background
No errors and sea polygons came back, but the floodblocker blocks still too much. I've tried it with other fb numbers but it still gives the same picture:
http://img404.imageshack.us/img404/3702/nogroningen.jpg
The tested tile you can download at http://mijndev.openstreetmap.nl/~ligfietser/diverse/Test.zip
Minko,
I will download your test data and give it a try.
If you want to get detailed information what the flood blocker is doing, you should enable an appropriate logging. See http://www.mail-archive.com/mkgmap-dev@lists.mkgmap.org.uk/msg02381.html how the logging.properties file can be configured and add the line uk.me.parabola.mkgmap.reader.osm.SeaPolygonRelation.level=INFO to the logging.properties file.
You might also add the parameter fbdebug to the sea-generation options. In this case the flood blocker creates GPX files for each checked polygon and the pro blocking (highways) and the contra blocking (ferry routes) points. Opening these files with JOSM makes it easier to understand why the flood blocker fails.
WanMil
Ok, I have tested the tile with your parameters. The sea generator created one big sea polygon (sea_polygon.png). As you can see the polygon is erroneous because it intersects itself. This is caused by the incomplete coast data in the tile which squeezes the sea generator to guess how the real sea polygon looks like. I must admit that a check could be added if the polygon intersects itself and in this case the sea sector extension could try some other completion strategies. (But that's not a task of the flood blocker and I guess it would be a performance problem.)
Without the flood blocker large areas near the german border would be flooded. The flood blocker detects that (see sea_polygon_contra.png) by checking how many blocking points are contained in the polygon. In this case there were 26602 points within the sea polygon and therefore the polygon was converted from sea to land polygon. As a result the flood blocker worked perfectly!
You can see the result of the flood blocker in the logfile: Flood blocker for sea polygon 4611686018427390756 area 476449303,0000 sea 125 land 26602 ratio 5,5571 Polygon 4611686018427390756 type sea seems to be wrong. Changing it to land
So from my point of view this was a good test case for the flood blocker and it worked as expected.
Have fun! WanMil Well can you check why it does not work when giving "polygons" or "no-mp" as command? Multipolygon mode is not really the best solution....
Felix, there is nothing to check. The flood blocker works only in multipolygon mode. It is not possible to implement that for the polygon mode. Where do you think is the advantage of the polygon mode? WanMil