I have lat/lng, angle with North and a length of a polygone. I want to draw the polygone on a map. Like in this figure:
And I want to adjust opacity of it in realtime.
Which GIS or Map viewer I gonna use for this purpose. Sadly, I will use it without Internet.
Any opensource-related advice or sample application will be best for me. Java is really okay for integrating my existing app.
Will openstreetmap or google maps provide me these?