
The Olinda Oil Field dominates the western hills of this 1950 survey, marking a period where petroleum extraction and citrus ranching defined the landscape of northern Orange County. The transition from industrial hill country to the developing residential and agricultural grids is evident in the layout of Yorba Linda and Placentia, where streets like Valencia Ave and Alta Vista Ave begin to organize the terrain. In the canyons of the Santa Ana Mountains, natural features such as La Vida Mineral Springs and Carbon Canyon Mineral Springs highlight the era's local recreation and wellness destinations.
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This is the sole edition of this map. No revisions or reprints were ever made.
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