wgs84 is coordinates on sphere, you need to transform all the points to x,y coordinates
I have my own library to read and draw SHAPE files.
I use QWidget to draw primitives and it very fast for me. For example, about 500 000 points(points, polylines, polygons) and it takes about 0.5 sec to draw. QgraphicsView was too slow.
for coordination transformation i use proj.4.




Reply With Quote

Bookmarks