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1950 Map of San Sebastian NO

Name: 1950 Topographic Map of San Sebastian NO
Creator: U.S. Geological Survey
Published: 1950
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1950

About this map

San Sebastián serves as the focal point of this mid-century survey, showing the urban street grid and surrounding agricultural barrios before the era of major highway expansion. The landscape is defined by the winding course of the Río Culebrinas and Río Guatemala, with the Acueducto de San Sebastián marking the critical water infrastructure of the period. Local landmarks like the Iglesia Presbiteriana appear in the outlying Piedras Blancas barrio.

Densely packed contour lines reveal the dramatic elevation changes characteristic of northwestern Puerto Rico, transitioning from the river valleys into upland barrios like Hoya Mala and Aibonito. The map documents a rural society organized around established land divisions, including Bahomamey and Calabazas, where a network of trails and a Linea de Transmisión connect scattered homesites across the mountainous terrain.