Hi Mort here,first timer never used this before and have a Permaculture Design course to complete. Once you grab ya image off google earth how do you put a border aroud your property?
Use the Sandbox - Drape Tool
See these learning resources:
Enabling the Sandbox Tools — SketchUp Help
Sandbox Tools — SketchUp Help
Drape Tool — SketchUp Help
How do I drape geometry onto terrain? — SketchUp Help