[mkgmap-dev] mkgmap gives java error

Sat Mar 13 19:34:45 GMT 2010

Hello Tony,

> I got my first GPS recently, a Garmin GPSmap 60CSx, and am now trying
> to create maps for it via mkgmap, but am having problems. I'm running
> Debian Lenny, with mkgmap-r1600 (current version) and Sun Java 6. My
> machine is 32-bit AMD with 2GB memory.
> 
> I managed OK (using an older mkgmap version) to convert and upload a few
> small city maps (Dublin, Barcelona, etc.) but can't manage (using either
> mkgmap version) a bigger map, all of Ireland, which I got from Geofabrik
> (http://download.geofabrik.de/osm/). The .osm file is 318MB in size.
> When I run mkgmap (with no options) I get an error, which starts as
> follows:
> 
> java.lang.OutOfMemoryError: Java heap space
> 	at java.util.Arrays.copyOfRange(Arrays.java:3209)
> 	at java.lang.String.<init>(String.java:216)
> 	at
> com.sun.org.apache.xerces.internal.xni.XMLString.toString(XMLString.java:185)
> 	at
> com.sun.org.apache.xerces.internal.util.XMLAttributesImpl.getValue(XMLAttributesImpl.java:537)
> 	at
> com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.processAttributes(XIncludeHandler.java:2030)
> 	at
> com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.startElement(XIncludeHandler.java:907)
> 	at
> com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:400)
> 
> I then used splitter (current version) to split the map file, which
> resulted in a single file being produced, 142MB after unpacking (less
> than half the size of the original!?), and submitted that to mkgmap,
> but it bombed out again (though with a different error).
> 
> Can anybody suggest what I might need to do to get it working?

Sounds like you need to specify a suitable value for the splitter's
--max-nodes option so that it creates multiple output files rather than
just one (i.e. it really does split the map!) I prefer small tiles so I
normally use --max-nodes=600000

Mark