1975 Map of San Bernardino South

About this map

Dense urban and industrial development defines the landscape of the San Bernardino South quadrangle during the mid-1970s. This orthophotoquad, produced from aerial photography by the Geological Survey and the Soil Conservation Service, documents the rapid expansion of the Inland Empire. The intersection of major transportation corridors is visible, connecting the established centers of Rialto and Colton with the growing residential areas of Grand Terrace and Loma Linda. To the south, the northern reaches of Riverside appear, showing the transition from heavy industry and rail yards to suburban neighborhoods. The sharp contrast between the grid-like street patterns of the valley floor and the undeveloped, ridged terrain in the southeastern corner illustrates the geographic limits of post-war sprawl in Southern California.