Can someone point me in the direction of some high spatial resolution and reasonably recent satellite imagery for central Canada (Manitoba)? I am trying to determine whether I can generate accurate data of tree lines for residential properties for land surveys. The current procedure is for the guys in the field to take a few ambiguous shots of trees and for the CAD guys interpret them - often causing issues. Does anyone know if it is possible to determine tree lines using remotely sensed data? I am hoping I can manipulate the data in ArcGIS to create polygons of cover, and then overlay the tree shots on to the surveyed data.
- Relatively recent (no good if the trees have been pulled down since image was taken!
- High enough resolution for residential lot level
- Free (well at least until I work out whether it is feasible)