Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Mark Burton wrote: Hello Garvan, I found a generalize function in gpsmapedit that removed 10% of the points in the file, but the national boundaries still did not display, so I split the very long polyline up and then it compiled correctly. I don't see why that was required because we already split lines that have more than 250 points. This experience may be worth noting for others who see long lines disappearing with no error message when compiling in osm format. Sure, but I would rather find out why the existing line splitting didn't work satisfactorily. Mark I managed to isolate the problem further. The lines disappear only when you have ways where the first and last point of the way are identical. It makes no difference if I merge the first and last node or when they have separate node id's. This has allowed me to make a small file demonstrating the problem, which I have uploaded to http://dl.dropbox.com/u/4900023/cambodia.osm.gz . This file contains nine ways (contour lines) but when compiled with the option --remove-short-arcs=5 only three ways (one of which might be too small to see) are in the img file. Now that I understand the problem I can avoid it easily by pre-processing the file, but I am sure others must be relying on --remove-short-arcs with raw osm input. Garvan ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Hi Garvan, Thanks for persevering with this issue. Your latest example has brought me enlightenment! I will work on a solution this evening. Mark ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Hello Garvan, I found a generalize function in gpsmapedit that removed 10% of the points in the file, but the national boundaries still did not display, so I split the very long polyline up and then it compiled correctly. I don't see why that was required because we already split lines that have more than 250 points. This experience may be worth noting for others who see long lines disappearing with no error message when compiling in osm format. Sure, but I would rather find out why the existing line splitting didn't work satisfactorily. Mark ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Hello Garvan, http://dl.dropbox.com/u/4900023/cambodia.osm If you zip up that file to save my bandwidth, I will take a look at it. Mark ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Mark Burton wrote: Hello Garvan, http://dl.dropbox.com/u/4900023/cambodia.osm If you zip up that file to save my bandwidth, I will take a look at it. Mark Sorry, wasn't thinking. http://dl.dropbox.com/u/4900023/cambodia.osm.zip Garvan ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Well, I looked at it but learnt nothing. I just get an empty map, no lines, no diagnostics, nothing at all. Mark ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Mark Burton wrote: Well, I looked at it but learnt nothing. I just get an empty map, no lines, no diagnostics, nothing at all. Mark If you zoom in I think the contours and provincial boundaries will show up, but at full zoom nothing shows because the national boundaries are missing. I am not sure exactly when they should show in mapsource, but gpsmapedit tells me they are not in the img file at all. Garvan ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
If you zoom in I think the contours and provincial boundaries will show up, but at full zoom nothing shows because the national boundaries are missing. I am not sure exactly when they should show in mapsource, but gpsmapedit tells me they are not in the img file at all. OK, I think what's happening here is that the file contains a lot of points that are so close together that the remove-short-arc process just throws them away and then throws the ways away because they contain less than 2 points. If you look at the diagnostics you get lots of lines like: 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-2475) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78333mlon=103.63197zoom=17) - merging node -187534 into -187526 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-2478) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78236mlon=103.65167zoom=17) - merging node -187581 into -187573 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 700 (http://www.openstreetmap.org/browse/way/-2477) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78327mlon=103.34835zoom=17) - merging node -187572 into -187564 and then later you get: 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 100 (http://www.openstreetmap.org/browse/way/-11092) has less than 2 points - deleting it 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-11091) has less than 2 points - deleting it 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 100 (http://www.openstreetmap.org/browse/way/-11094) has less than 2 points - deleting it Can you reduce the number of points in the ways? Mark ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Mark Burton wrote: If you zoom in I think the contours and provincial boundaries will show up, but at full zoom nothing shows because the national boundaries are missing. I am not sure exactly when they should show in mapsource, but gpsmapedit tells me they are not in the img file at all. OK, I think what's happening here is that the file contains a lot of points that are so close together that the remove-short-arc process just throws them away and then throws the ways away because they contain less than 2 points. If you look at the diagnostics you get lots of lines like: 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-2475) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78333mlon=103.63197zoom=17) - merging node -187534 into -187526 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-2478) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78236mlon=103.65167zoom=17) - merging node -187581 into -187573 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 700 (http://www.openstreetmap.org/browse/way/-2477) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78327mlon=103.34835zoom=17) - merging node -187572 into -187564 and then later you get: 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 100 (http://www.openstreetmap.org/browse/way/-11092) has less than 2 points - deleting it 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-11091) has less than 2 points - deleting it 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 100 (http://www.openstreetmap.org/browse/way/-11094) has less than 2 points - deleting it Can you reduce the number of points in the ways? Mark Reducing the number of points sounds like a good idea and I have read of tools that do this. The import is from shapefiles originally, so I think I can manage this. But why do the national boundaries display correctly when I delete the contour lines? Something is wrong. The line that is being dropped is a single line with 22,668 points. Garvan ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Re: [mkgmap-dev] Bug report --remove-short-arcs=5 ???
Garvan maew wrote: Mark Burton wrote: If you zoom in I think the contours and provincial boundaries will show up, but at full zoom nothing shows because the national boundaries are missing. I am not sure exactly when they should show in mapsource, but gpsmapedit tells me they are not in the img file at all. OK, I think what's happening here is that the file contains a lot of points that are so close together that the remove-short-arc process just throws them away and then throws the ways away because they contain less than 2 points. If you look at the diagnostics you get lots of lines like: 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-2475) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78333mlon=103.63197zoom=17) - merging node -187534 into -187526 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-2478) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78236mlon=103.65167zoom=17) - merging node -187581 into -187573 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm: Way 700 (http://www.openstreetmap.org/browse/way/-2477) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78327mlon=103.34835zoom=17) - merging node -187572 into -187564 and then later you get: 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 100 (http://www.openstreetmap.org/browse/way/-11092) has less than 2 points - deleting it 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 200 (http://www.openstreetmap.org/browse/way/-11091) has less than 2 points - deleting it 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm: Way 100 (http://www.openstreetmap.org/browse/way/-11094) has less than 2 points - deleting it Can you reduce the number of points in the ways? Mark Reducing the number of points sounds like a good idea and I have read of tools that do this. The import is from shapefiles originally, so I think I can manage this. But why do the national boundaries display correctly when I delete the contour lines? Something is wrong. The line that is being dropped is a single line with 22,668 points. Garvan PS. Thanks for your help. ___ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
