[mkgmap-dev] Contour lines always visible

Mon Feb 15 10:33:52 GMT 2010

Carlos Dávila escribió:
> I have successfully built contour map for Spain using srtm2osm ->
> splitter -> mkgmap. I combine srtm img's and regular map img's with
> mkgmap. Up to here everything goes fine. The problem now is that major
> and medium contour lines are shown at any zoom level in MapSource and
> gps, not taking into account resolution established in style (see
> below). It makes rendering really slow when you zoom out and all the
> map is covered by contour lines. Minor contour lines do appear at the
> right zoom level (1.5 km in MapSource). The problem is in the contour
> map, because it's the same if I only install it (without regular map).
> Contour lines style used:
> |contour=elevation & contour_ext=elevation_minor
>     { name '${ele|conv:m=>ft}'; }
>     [0x20 resolution 23]
> contour=elevation & contour_ext=elevation_medium
>     { name '${ele|conv:m=>ft}'; }
>     [0x21 resolution 22]
> contour=elevation & contour_ext=elevation_major
>     { name '${ele|conv:m=>ft}'; }
>     [0x22 resolution 20]|
> Commands used:
> *srtm:
> mono Srtm2Osm.exe -bounds1 35.99 -9.501 43.79 4.33 -step 10 -cat 100
> 20 -large -corrxy 0.0005 0.0005 -o srtm_peninsula.osm
>
> *splitter:
> java -Xmx2500m -jar /home/carlos/Paquetes/mkgmap/dist/splitter.jar
> --mapid=63240101 --mixed=yes --cache=/160GB/cache_srtm/peninsula/
> --max-nodes=5000000 --split-file=areas.list srtm_peninsula.osm
>
> *regular map:
> time java -Xmx600m -ea -Dlog.config=logging.properties -jar mkgmap.jar
> --generate-sea=polygons,extend-sea-sectors --route --latin1
> --code-page=1252 --gmapsupp --series-name="OSM-Iberia-n" --index
> --road-name-pois=0x640a --ignore-maxspeeds --remove-short-arcs
> --add-pois-to-areas --adjust-turn-headings --report-similar-arcs
> --link-pois-to-ways --location-autofill=1 --drive-on-right
> --check-roundabouts --check-roundabout-flares --style=mio
> --delete-tags-file=quitar_is_in -c spain.args
>
> *contour map:
> family-id=36
> product-id=1
> family-name=Curvas nivel Península
> series-name=Curvas nivel
> area-name=Península Ibérica
> draw-priority=28
> transparent
> style=srtm
>
> mapname: 63240101
> description: SRTM-Iberia-01
> input-file: /160GB/Srtm2Osm/63240101.osm.gz
>
> mapname: 63240102
> description: SRTM-Iberia-02
> input-file: /160GB/Srtm2Osm/63240102.osm.gz
> ...
>
> *final join:
> java -ea -jar mkgmap.jar --gmapsupp --family-id=35 --product-id=1
> --family-name="OSM España" ../mapas/curvas-es/6324000*.img
> typ/SPAIN-35.TYP --family-id=36 --product-id=1 --family-name="Curvas
> nivel Península" ../mapas/curvas-es/632401*.img
The problem was in the level definition in the options file. It was
"levels = 0:23, 1:22, 2:20"; changing it to "levels = 0:23, 1:22, 2:20,
3:18" fixed the problem. In the wiki [1] its stated that the lowest
level needs to have at least one object in it, but it seems to be right
the opposite, as I needed to add an extra 3:18 level which has no object
in it to get it work. I know this page of the wiki is quite outdated
(there was no mention to styles in it), so if you can give some
information about this issue I will update it accordingly.
Now that contour lines are correctly drawn a new problem arises. If I
combine contour img's with osm img's either with mkgmap or gmaptool all
map becomes flooded. If I combine them with MapSource land is ok, but
routing is broken. So, there must be still something I'm doing wrong.
[1] http://wiki.openstreetmap.org/wiki/Mkgmap/help/custom#Level