Excuse me, what are currently under more portable small open source gis software, can be used in qt, relatively full information, best can in qt creator can very good use,
At the moment, I found that some open source gis software, such as: qgis, mapwingis;
Qgis as if did not provide a developer's interface, I understand is to compile the source code oneself? And the relevant data is less; Seems not commercial
Is a mapwingis Activex controls, qt USES words, need to deal with generated by qt built-in tools dumpcpp mapwingis. H and mapwingis. CPP file, then directly by qt provides interface for development in the two files, call some interface function in the process of development is always an Error, such as: Map: : AddLayer (IDispatch * Object, bool Visible) this function call is not effective, complains: QAxBase: Error calling IDispatch member Open: Type mismatch parameter in 0