[mkgmap-dev] Creating a map with contour lines and DEM

Thu Feb 15 13:51:50 GMT 2018

The solution was actually simple: the lines created by Srtm2Osm had a 
"contour" tag only, but no "contour_ext" tag.
It is necessary to supply the "-cat" option, together with values for 
major, medium, and minor elevation steps.
I.e. I changed the call to
Srtm2Osm.exe -step 25 -cat 500 100 25 -large
and now things work.

Am 13.02.2018 um 19:38 schrieb Bernhard Hiller:
> I was trying to create a map of Taiwan including DEM data and 
> elevation contour lines. The DEM part was easy. But strangely, I 
> cannot get elevation contourlines.
>
> I downloaded hgt data from Viewfinder Panoramas, and placed them into 
> the cache directory of srtm2osm.
> I called srtm2osm in a batch file:
>
> SET SRTM=:\Program Files (x86)\OpenStreetMap\Srtm2Osm\Srtm2Osm.exe"
> SET OUTPUTDIR=\Maps\Raw\Taiwan.DEM\
>
> %SRTM% -bounds1 21.81 120 23.6 122.1 -o %OUTPUTDIR%TaiwanS.osm
> %SRTM% -bounds1 23.59 120 25.4 122.1 -o %OUTPUTDIR%TaiwanN.osm
>
> TaiwanS mearures 1554993 kB, TaiwanN 2249418 kB (I must do it in 2 
> parts, otherwise the program uses more than 7 GB of RAM and causes 
> lots of paging).
> Next, I sorted one of the files with osmosis (originally I sorted and 
> merged both of them, and then merged with an extract from Geofabrik; 
> that's what I plan to do when I got things working...):
>
> SET OSMOSIS=:\Program Files 
> (x86)\OpenStreetMap\osmosis-0.46\bin\osmosis.bat"
> SET INPUTDIR=\Maps\Raw\Taiwan.DEM\
> %OSMOSIS% --read-xml %INPUTDIR%TaiwanS.osm --sort --write-pbf 
> %INPUTDIR%Taiwan_Ele.osm.pbf
>
> The output file measures 16670 kB.
> Next, I split it with
>
> SET JAVA=:\Program Files\Java\jre1.8.0_121\bin\java.exe"
> SET SPLITTER=:\Program Files 
> (x86)\OpenStreetMap\splitter-r590\splitter.jar"
> SET INPUTDIR=\Maps\Raw\Taiwan.DEM\
> SET INPUTDATA=iwan_Ele.osm.pbf
> SET NAME=ernieMap Bike Taiwan"
>
> %JAVA% -Xmx6G -jar  %SPLITTER% ^
>     %INPUTDIR%\%INPUTDATA% ^
>     --description=AME% ^
>     --max-nodes%00000 ^
>     --no-trim ^
>     --mapidG120001 ^
>     --max-threads=^
>     --keep-complete=ue
>
> which creates 3 pbf-files.
> Finally, I build the map with
>
> SET JAVA=:\Program Files\Java\jre1.8.0_121\bin\java.exe"
> SET MKGMAP=:\Program Files (x86)\OpenStreetMap\mkgmap-r4107\mkgmap.jar"
> SET 
> PREPROC=\Data\Projects\Projects.Net2\StylePreProcessor\bin\Debug\StylePreProcessor.exe
> SET STYLE=\Maps\Development\Style.Mapnik\Mapnik.Bike
> SET DEMPATH=\Maps\Raw\Taiwan.DEM
> SET NAME=ernieMap Bike Taiwan"
> SET TYP=4712.TYP
>
> %PREPROC% /in=\Maps\Development\Style.Mapnik\Mapnik.Base /out=%STYLE% 
> /defines=KE,THAI
> copy E:\Maps\Development\Style.Mapnik\%TYP% %TYP%
> copy "C:\Program Files (x86)\OpenStreetMap\GMT\gmt.exe" gmt.exe
> gmt.exe -wy 4712 %TYP%
>
> %JAVA% -Xmx6G -ea -jar %MKGMAP% ^
>     --style-file=TYLE% ^
>     --family-name�rnieMapTaiwan ^
>     --family-id712 ^
>     --product-id=^
>      --description=AME% ^
>     --series-name=AME% ^
>     --name-tag-list=me:en,int_name,name ^
>     --latin1 ^
>     --add-pois-to-areas ^
>     --route ^
>     --location-autofill=unds,nearest ^
>     --preserve-element-order ^
>     --draw-priority% ^
>     --index ^
>     --nsis ^
>     --show-profiles=^
>  --generate-sea=ltipolygon,extend-sea-sectors,floodblocker ^
>     --max-jobs=^
>     --dem-poly=eas.poly ^
>     --x-dem=EMPATH% ^
>  --x-dem-dists314,4000,6000,8000,10000,15000,20000,30000 ^
>     --gmapsupp 4*.osm.pbf ^
>     %TYP%
>
> move gmapsupp.img E:\Maps\Use\Taiwan.IMG
>
> which creates an IMG file of 18798 kB.
> It is recognized by my Oregon 600.
> In the demo mode, I navigate to a waypoint (Luigui, 22.99573 N, 
> 120.63496 E).
> I expect to see a map of contourlines only. But I get a completely 
> white map.
> Elevation from DEM is 250m directly adjacent to the waypoint, and 
> other sensible values nearby.
>
> The style file contains:
> contour=evation & contour_ext=elevation_major & (ele > 0 | ele < 
> 0)         { name '${ele|conv:m=t}'; } [0x20 level 4]
> contour=evation & contour_ext=elevation_medium & (ele > 0 | ele < 
> 0)        { name '${ele|conv:m=t}'; }           [0x21 level 2]
> contour=evation & contour_ext=elevation_minor & (ele > 0 | ele < 
> 0)         { name '${ele|conv:m=t}'; } [0x22 level 0]
>
> The TYP file (created and compiled with MapTk) contains:
> [Polyline]
> Type=20
> String=Höhenlinie
> String=Elevation
> Color=0x000000
> Line
> [END]
>
> [Polyline]
> Type=21
> String=Höhenlinie
> String=Elevation
> Linewidth=
> Color=00x000000
> [END]
>
> [Polyline]
> Type=22
> String=Höhenlinie
> String=Elevation
> Linewidth=
> Color=00x000000
> [END]
> which should cause black elevation contour lines.
>
> What do I do wrong?
>
> Thanks a lot for your hints.
>
> Kind regards,
> Bernhard
>