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1957 Map of Initial Point, 1971 Print
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1957 Map of Initial Point

USGS Topo · Published 1971

About this map

Initial Point serves as the geographic anchor for this 1950s survey, marking the intersection of the Boise Base Line and the Boise Meridian. This specific volcanic butte defined the public land surveys for most of Idaho, making it a critical landmark for property history and early western mapping. The landscape transitions from the arid upland survey point down to the canyon floor carved by the Snake River, which forms the border between Ada and Owyhee counties.

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Map Details

Date Portrayed1957
Date Published1971
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.9 inches

Editions of this 1957 Initial Point Map

Historical Maps of Ada County Through Time

103 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain