Range map of Pseudotsuga menziesii (Douglas-fir) in western North America.
Own work using Grass GIS and Inkscape.
Data sources:

Coastlines, lakes, and borders are from National Geophysical Data Center except Nunavut borders, which are from GeoGratis.
Douglas-fir range data is from U.S. Geological Survey.
Map Projection: Lambert Conformal Conic
Halava