cartographic perspectives
75
Number 43, Fall 2002
Excerpt from the NPS map of Crater Lake National Park, Oregon at actual size. The map employs the texture substitution technique to portray forests. The
tree canopy texture derives from a cloned aerial photograph taken in California. It fills a forest boundary delineated precisely—small copses of trees are visible
on the map—from a USGS Digital Orthophoto Quadrangle of Crater Lake. Graphical embossment gives forest edges a slightly tree dimensional appearance.
Getting Real Addendum B
