[mkgmap-dev] Splitter

Thu Jan 29 09:19:25 GMT 2009

Steve Ratcliffe wrote:

> Was there anything special about what did end up in the file?  I tried it
> out and although my file was not big enough to need splitting, all of it
> ended up in the output file.

The nodes and ways in the resulting 63240001.osm.gz look fine to me. The
only difference I see is that srtm2osm uses double quotation marks and
splitter.jar uses single quotation marks.

> Were there any messages?  It could be that contour lines are very long and
> regularly cross more than four tiles.

I made another test with a smaller file and this is what it says:

$java -Xmx2048M -jar splitter.jar --mapid=31000001 --max-nodes=100000
srtm_5.8_47.7.osm

key mapid/ val 31000001

key max-nodes/ val 100000

comparing size 6

a (47.9443359375,6.0205078125) to (47.98828125,6.064453125), size=6

Total time 10s

The result is:
-rw-r--r-- 1 unrz96 unrz  99M 2009-01-29 09:52 srtm_5.8_47.7.osm
-rw-r--r-- 1 unrz96 unrz  158 2009-01-29 09:52 areas.list
-rw-r--r-- 1 unrz96 unrz  340 2009-01-29 09:53 template.args
-rw-r--r-- 1 unrz96 unrz 535K 2009-01-29 09:53 63240001.osm.gz

The original file had ~ 1 million nodes:
$grep "<node id" srtm_5.8_47.7.osm | wc -l
1041479

The result has just 15086:
$gzip -cd 63240001.osm.gz | grep "<node id" | wc -l
15086

BTW: The name of the output file is not correct, I had set the map id to
31000001 but it used 63240001.

> Otherwise I have no idea, could you put up the files you were using somewhere?

Sure, here it is:
http://www.kleineisel.de/ralf/gps/splitter/