[mkgmap-dev] Differences between gmapsupp files

Tue Oct 4 19:11:28 BST 2011

I have compared with GMapTool gmapsupp.img files generated by mkgmap in 
a single step [1] along with all tiles img's, overview and index or in a 
separate step [2+3] just joining the img's. I can see a couple of 
differences:
a) Single step creation assigns last map in args file as mapset name 
whereas two steps creation assigns a default "OSM street map" name. In 
the first case, wouldn't it be better to give mapset a name representing 
all the map, such as series-name or family-name. Regarding "OSM street 
map" I find "OpenStreetMap" would be more appropriate, don't you?
b) Map generated in two steps lacks SRT map and subfile. I didn't find 
many information about the purpose of the SRT file. Would it make any 
difference on the functionality of the gmapsupp having no SRT?

[1] java -Xmx600m -ea -jar mkgmap.jar 
--generate-sea=polygons,extend-sea-sectors --route --latin1 
--code-page=1252 --gmapsupp --series-name="OSM-Portugal" 
--overview-mapname=55220000 --index --road-name-pois --ignore-maxspeeds 
--remove-short-arcs --merge-lines --add-pois-to-areas 
--adjust-turn-headings --report-similar-arcs --link-pois-to-ways 
--location-autofill=bounds --drive-on-right --check-roundabouts 
--check-roundabout-flares --style=mio typ/PORTU-22.TYP -c portugal.args
[2] java -Xmx600m -ea -jar mkgmap.jar 
--generate-sea=polygons,extend-sea-sectors --route --latin1 
--code-page=1252 --series-name="OSM-Portugal" 
--overview-mapname=55220000 --index --road-name-pois --ignore-maxspeeds 
--remove-short-arcs --merge-lines --add-pois-to-areas 
--adjust-turn-headings --report-similar-arcs --link-pois-to-ways 
--location-autofill=bounds --drive-on-right --check-roundabouts 
--check-roundabout-flares --style=mio typ/PORTU-22.TYP -c portugal.args
[3] java -Xmx1000m -ea -jar mkgmap.jar --gmapsupp 
--country-name=Portugal --country-abbr=POR --area-name=Portugal 
--family-name="OpenStreetMap Portugal" --family-id=22 --product-id=1 
--series-name="OSM-Portugal" --index PORTU-22.TYP 5522*.img