Procedure:
The landscape architect starts the project with the study of
the route on USGS sheets and stereo pairs of aerial photographs.
In some cases, topo maps at larger scale are available. The U. S.
Forest Service and Soil Conservation Service use maps and aerial
photos at a scale of l″ = 660′ or 80 chains to a mile. Several
routes may be studied on paper using a 314 pencil to determine the
economy of construction in terms of excavation. In park road design
where preservation takes precedent over economy, a corridor is
selected to conserve natural and historical features within the
immediate area and on the viewshed as well.
