Thanks for the feedbacks, I don&#39;t think I&#39;m creating imgs files and then merge them - as Colin is doing. What I do is the following:<br><br>1. download some countries *.pbf files from geofabick and place in a $DATA folder<br>
2. run splitter on them (java -jar $SPLITTER_HOME/splitter.jar --output-dir=&quot;$DATA&quot; $DATA/*.pbf)<br>3. run mkgmap on the splittered pbf files (java -jar $MKGMAP_HOME/mkgmap.jar --route --remove-short-arcs --add-pois-to-areas --index --gmapsupp --output-dir=&quot;$DATA&quot; $DATA/6*osm.pbf);<br>
<br>Do you mean I should first collate the *pbf together in a sinfle pbf file  (using osmconvert or similar) or should I get since the beginning a single pbf/osm file containing the whole area I want to process?<br><br>Thanks! <br>