
Hillsboro serves as the central hub of this modern survey, surrounded by established residential and industrial districts that transition into the agricultural foothills of the Tualatin Mountains. The landscape is a complex network of suburban expansion and historic rural pockets, where the Hillsboro Airport and the commercial corridors of Aloha contrast with the quiet northern reaches near Pumpkin Ridge. Traces of the region's early settlement remain visible through several historic burial grounds, including the Old Scotch Cem and West Union Cem, which anchor the northern farming communities of Glencoe and Helvetia. Water management is a defining feature of the terrain, marked by numerous reservoirs and sumps such as the Leichtman Sump and Jackson Reservoir, alongside the meandering paths of McKay Cr and Rock Cr that drain the valley floor toward Jackson Bottom.
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This is the sole edition of this map. No revisions or reprints were ever made.
1915 · Hillsboro
USGS Topo · 1:62,500
1916 · Tualatin
USGS Topo · 1:62,500
1918 · Hillsboro
USGS Topo · 1:62,500
1939 · Tualatin
USGS Topo · 1:62,500
1940 · Tualatin
USGS Topo · 1:62,500
1940 · Hillsboro
USGS Topo · 1:62,500
1941 · Gales Creek
USGS Topo · 1:62,500
1941 · Yamhill
USGS Topo · 1:62,500
1942 · Yamhill
USGS Topo · 1:62,500
1948 · Vancouver
USGS Topo · 1:250,000