[mkgmap-dev] Tiles pruned in DEM map

Tue Dec 22 17:05:21 GMT 2020

I'm sorry, probably I didn't explain well enough.

Overview is always correct, the problem affects only tiles. As you saw 
in the screenshots of my first mail, they are different in size, but 
they are generated from the same input files, so they should have the 
same size. If you zoom in to an area that should be included in a tile, 
only overview map is shown, no detailed map. Even more, when you zoom 
in, at the given point where detailed map appears, tile boundary jumps 
to the correct size, but nothing but overview is displayed outside the 
"pruned" tile.

You can download correct and wrong files from the links below and play 
with them to get a better idea of the problem. They correspond to first 
tile of Australia as shown in my screenshots.

https://alternativaslibres.org/tmp/11-error.zip

https://alternativaslibres.org/tmp/12-OK.zip

Error was generated with java -Xmx27G -ea 
-Dlog.config=logging.properties -jar mkgmap.jar 
--dem=hgt/LIDAR-Sonny,hgt/ALOS,hgt/VIEW1,hgt/SRTM1,hgt/EU-DEM,hgt/VIEW3,hgt 
--dem-poly=polygons/$pais.poly --overview-dem-dist=276160 -c 
opciones_comunes $CODEPAGE --gmapi --show-profiles=1 --bounds=bounds.zip 
--precomp-sea=sea.zip --route --family-name="OSM $MAPA DEM" 
--family-id=5${FID} --overview-mapname=${ABR}5${FID} 
--overview-mapnumber=${GRUPO}5${FID}000 --reduce-point-density=4 
--polygon-size-limits="24:12, 18:10, 16:0" --order-by-decreasing-area 
--location-autofill=is_in,nearest --drive-on=detect,$DRIVEON $LANGUAGE 
--road-name-config=${CONFIG} --style=mio --remove-ovm-work-files=true 
51145001.o5m tmp/${ABR}5${FID}.txt

OK was generated with java -Xmx27G -ea -Dlog.config=logging.properties 
-jar mkgmap.jar 
--dem=hgt/LIDAR-Sonny,hgt/ALOS,hgt/VIEW1,hgt/SRTM1,hgt/EU-DEM,hgt/VIEW3,hgt 
--dem-poly=polygons/$pais.poly --overview-dem-dist=276160 -c 
opciones_comunes $CODEPAGE --gmapi --show-profiles=1 --bounds=bounds.zip 
--precomp-sea=sea.zip --route --family-name="OSM $MAPA DEM" 
--family-id=5${FID} --overview-mapname=${ABR}5${FID} 
--overview-mapnumber=${GRUPO}5${FID}000 --reduce-point-density=4 
--polygon-size-limits="24:12, 18:10, 16:0" 
--location-autofill=is_in,nearest --drive-on=detect,$DRIVEON $LANGUAGE 
--road-name-config=${CONFIG} --style=mio --remove-ovm-work-files=true 
51145001.o5m tmp/${ABR}5${FID}.txt

Although removing --overview-dem-dist solved the issue in my first test 
(see command below, correct output), after a lot of tests removing 
options one by one from the original command, finally it seems the 
problem is caused by option --order-by-decreasing-area (or the 
combination of both).

java -Xmx27G -ea -Dlog.config=logging.properties -jar mkgmap.jar 
--dem=hgt/LIDAR-Sonny,hgt/ALOS,hgt/VIEW1,hgt/SRTM1,hgt/EU-DEM,hgt/VIEW3,hgt 
--dem-poly=polygons/$pais.poly -c opciones_comunes $CODEPAGE --gmapi 
--show-profiles=1 --bounds=bounds.zip --precomp-sea=sea.zip --route 
--country-name=$PAIS --country-abbr=${ABR} --area-name="$MAPA" 
--family-name="OSM $MAPA DEM" --family-id=5${FID} 
--product-version=$VERSION --series-name="OSM-$MAPA-DEM" 
--overview-mapname=${ABR}5${FID} --overview-mapnumber=${GRUPO}5${FID}000 
--name-tag-list=$NAMETAG --process-destination --process-exits 
--housenumbers --reduce-point-density=4 --polygon-size-limits="24:12, 
18:10, 16:0" --order-by-decreasing-area --add-pois-to-areas 
--link-pois-to-ways --location-autofill=is_in,nearest 
--drive-on=detect,$DRIVEON --check-roundabouts --check-roundabout-flares 
--license-file=license_OSM_${HGT} --copyright-file=copyright $LANGUAGE 
--road-name-config=${CONFIG} --style=mio --remove-ovm-work-files=true 
51145001.o5m tmp/${ABR}5${FID}.txt

El 22/12/20 a las 10:15, Gerd Petermann escribió:
> Hi Carlos,
>
> It seems I still don't understand what the problem is or how to reproduce it.
> I tried this command and the overview map looks OK:
> java -Xmx4G -jar d:\mkgmap\dist\mkgmap.jar --dem=f:\srtm3 --overview-dem-dist=128000 --show-profiles=1 --gmapi f:\dwnload\temp\51145001.o5m
>
> If it is related to the DEM data I probably cannot help much. You may try a slightly different value for the --overview-dem-dist option or a modified polygon
> given with the --dem-poly option.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <carlos at alternativaslibres.org>
> Gesendet: Montag, 21. Dezember 2020 22:09
> An: mkgmap-dev at lists.mkgmap.org.uk
> Betreff: Re: [mkgmap-dev] Tiles pruned in DEM map
>
> The problem seems to be caused by overview DEM. If I remove
> --overview-dem-dist option tile is complete in MapSource. The issue can
> be reproduced with this tile
> <https://alternativaslibres.org/tmp/51145001.o5m> and HGT from
> vierfinderpanoramas3
>
> El 18/12/20 a las 11:48, Gerd Petermann escribió:
>> Hi Carlos,
>>
>> not sure if I understand what the problem is. The two screenshots show completely different tile boundaries, so they were not created from the same splitter output.
>>
>> Gerd
>>
>> ________________________________________
>> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <cardavilam at gmail.com>
>> Gesendet: Donnerstag, 17. Dezember 2020 23:44
>> An: Development list for mkgmap
>> Betreff: [mkgmap-dev] Tiles pruned in DEM map
>>
>> I build several types of map (OSM, OSM+contour lines, maps for trucks
>> and OSM+DEM) for the same area, using same input files. I split
>> country.o5m with splitter and then use the same template.args output by
>> splitter for all maps, just changing mapname for the different types of
>> map. Given that, all resulting mapsets should have the same tiles, but
>> tiles in DEM map are smaller than in the other types. They share part of
>> the boundaries (usually two of them) with other types, but other
>> boundaries are moved in, reducing displayed tile size. See attached
>> screenshots. However, file size is the same (discounting *.DEM) for each
>> tile in *.gmap subfolders.
>>
>> Command is quite similar for OSM and OSM+DEM maps:
>>
>> java -Xmx27G -ea -Dlog.config=logging.properties -jar mkgmap.jar -c
>> opciones_comunes $CODEPAGE --gmapi --bounds=bounds.zip
>> --precomp-sea=sea.zip --route --country-name=$PAIS --country-abbr=${ABR}
>> --area-name=$MAPA --family-name="OpenStreetMap $MAPA"
>> --family-id=1${FID} --product-version=$VERSION --series-name="OSM-$MAPA"
>> --overview-mapname=${ABR}1${FID} --overview-mapnumber=${GRUPO}1${FID}000
>> --name-tag-list=$NAMETAG --process-destination --process-exits
>> --housenumbers --reduce-point-density=4 --polygon-size-limits="24:12,
>> 18:10, 16:0" --order-by-decreasing-area --add-pois-to-areas
>> --report-similar-arcs --report-dead-ends=2 --link-pois-to-ways
>> --location-autofill=is_in,nearest --drive-on=detect,$DRIVEON
>> --check-roundabouts --check-roundabout-flares --license-file=license_OSM
>> --copyright-file=copyright $LANGUAGE --road-name-config=${CONFIG}
>> --style=mio --check-styles -c $pais.args tmp/${ABR}1${FID}.txt
>>
>> java --Xmx27G -ea -Dlog.config=logging.properties -jar mkgmap.jar
>> --dem=hgt/LIDAR,hgt/ALOS,hgt/VIEW1,hgt/SRTM1,hgt/EU-DEM,hgt/VIEW3,hgt
>> --dem-poly=polygons/$pais.poly --dem-dists=3312,6624,9936,13248,26512
>> --overview-dem-dist=128000 -c opciones_comunes $CODEPAGE --gmapi
>> --show-profiles=1 --bounds=bounds.zip --precomp-sea=sea.zip --route
>> --country-name=$PAIS --country-abbr=${ABR} --area-name="$MAPA"
>> --family-name="OSM $MAPA DEM" --family-id=5${FID}
>> --product-version=$VERSION --series-name="OSM-$MAPA-DEM"
>> --overview-mapname=${ABR}5${FID} --overview-mapnumber=${GRUPO}5${FID}000
>> --name-tag-list=$NAMETAG --process-destination --process-exits
>> --housenumbers --reduce-point-density=4 --polygon-size-limits="24:12,
>> 18:10, 16:0" --order-by-decreasing-area --add-pois-to-areas
>> --link-pois-to-ways --location-autofill=is_in,nearest
>> --drive-on=detect,$DRIVEON --check-roundabouts --check-roundabout-flares
>> --license-file=license_OSM_${HGT} --copyright-file=copyright $LANGUAGE
>> --road-name-config=${CONFIG} --style=mio --remove-ovm-work-files=true -c
>> ${pais}-DEM.args tmp/${ABR}5${FID}.txt
>>
>> Both OSM and OSM+DEM maps can be downloaded from
>> https://alternativaslibres.org/en/downloads.php#Oceania
>>
>> Any idea why this happens?
>>
>> _______________________________________________
>> mkgmap-dev mailing list
>> mkgmap-dev at lists.mkgmap.org.uk
>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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