I'm still develop a Web GIS that show population distribution in form of heat map. I'm use Quantum GIS with Open Street Map & Q2Leaflet Plugin as a tool to accomplish it. The problem is, I just want to show the population distribution of Sulawesi, but when I download data via Open Street Map, I ended up download the World Map. I just want to use Sulawesi Map, convert it to leaflet & embed it to my Web GIS.
How should I do to convert ONLY Sulawesi Map into leaflet?