I tried to use Google Earth to model a city but there are problems with the image created by Geo-Location command. The trees in the image block the streets which I want to model and when I want to draw a shape, the cursor snaps to the image. "Open Street Maps" can export data to *.osm files. How do I import the *.osm files into SketchUp? If there are no *.osm file importers, how do I get images from "Google Maps" or "Open Street Maps" websites?