Re: [mkgmap-dev] Tiles pruned in DEM map

26 Dec 2020

      I'm sorry for the late response and for breaking the thread, but I 
didn't receive Gerd's last message, so I've had to copy it from mailing 
list archive. Reply inline.

OK, I think I understand what problem you see. I used JaVaWa 
MapConverter to install the map in 11-error.zip and 12-OK.zip played 
with it. With 11-error.zip only the data from the overview map is 
displayed when I zoom to e.g. S21.71088 E114.92708, while 12-OK.zip 
shows more details (this is with MapSource, in Basecamp I see details in 
both maps).

Yes, everything to the North of approx. S32.39125 is missing.

I tried to analyse your files and I see three suspicious things so far:

1) The routing data seems to be wrong, NodCheck reports "Could not find 
node for road 38a61 nod2=124c8 " for both tiles. I don't see such an 
error with the default style.

How can I check that? If both tiles are affected, probably this is not 
related with current issue, but other maps produced with the same style 
will also be wrong regarding routing.

2) The bad overview map contains a lot more 0x4a polygons. This is 
probably caused by the --order-by-decreasing-area, and I am not sure why 
this happens.

Do you think the problem is in the overview map or may be in tile map? 
If I open tile in MapEdit++ the number of non polygon elements is almost 
the same in wrong and correct maps. For example, number of roads is 
exactly the same. It seems as if something is masking part of the tile 
in MapSource (also in BaseCamp in my case); elements are there, but you 
can't see them.

3) You use a special version of mkgmap, so please try also with the 
latest version.

With latest mkgmap and default style problem persists.

My first guess was that the bad NOD file may cause this but the problem 
doesn't disappear when I remove the file 51145001.NOD, so this is 
probably not to blame. Same for the 51145001.DEM file.

I tried to reproduce the possible problem with the 0x4a tiles using the 
default style with this command java -Xmx4G -jar map.jar --route --gmapi 
--bounds=f:\osm\bounds.zip --precomp-sea=f:\osm\sea.zip 
--reduce-point-density=4 --polygon-size-limits="24:12, 18:10, 16:0" 
--order-by-decreasing-area --location-autofill=is_in,nearest 
f:\dwnload\temp\51145001.o5m but my overview map contains the same 
number of 0x4a tiles as your good map.

I cannot reproduce your DEM data because I don't know the polygon file 
(polygons/$pais.poly). Maybe I can reproduce the 0x4a problem when you 
create the test files again without --remove-ovm-work-files=true.

You can download polygon file from here 
<https://alternativaslibres.org/tmp/australia.poly> and ovm from here 
<https://alternativaslibres.org/tmp/ovm_51145001.img>.

El 22/12/20 a las 18:05, Carlos Dávila escribió:
...
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@lists.mkgmap.org.uk> im Auftrag 
von Carlos Dávila <carlos@alternativaslibres.org>
Gesendet: Montag, 21. Dezember 2020 22:09
An: mkgmap-dev@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@lists.mkgmap.org.uk> im Auftrag 
von Carlos Dávila <cardavilam@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?
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