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1974 Map of Santiago Peak, 1975 Print
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1974 Map of Santiago Peak

USGS Topo · Published 1975

About this map

Santiago Peak dominates this 1974 orthophotoquad, which utilizes aerial imagery to document the Santa Ana Mountains before extensive late-twentieth-century development altered the surrounding Orange County landscape. The photographic detail reveals the complex network of ridgelines and drainage basins defined by Silverado Canyon to the north and Trabuco Canyon further south. Produced through collaboration between the Orange County Board of Supervisors and federal surveyors, this study provides a precise visual record of natural landforms and early access roads. The transition from the high summit down to the lower alluvial fans demonstrates the geological character of the region as it existed just before the rapid suburban expansion of the 1970s and 1980s, preserving the state of these canyons at a specific moment in California's land-use history.

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Map Details

Date Portrayed1974
Date Published1975
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions22 x 26.8 inches

Editions of this 1974 Santiago Peak Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain