The Salt Flat Oil Field anchors the northwestern corner of this landscape, marking a history of petroleum extraction near Soda Springs. The terrain is defined by a dense network of drainage, where the San Marcos River and Plum Creek converge, shaping the agricultural and industrial layout of the region. Transportation corridors, including the rail-aligned settlement of Harwood, illustrate the historical movement of goods and people between local rural hubs.
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This is the sole edition of this map. No revisions or reprints were ever made.
1901 · Flatonia
USGS Topo · 1:125,000
1911 · San Marcos
USGS Topo · 1:125,000
1919 · San Marcos
USGS Topo · 1:125,000
1925 · San Marcos 4-c
USGS Topo · 1:48,000
1925 · San Marcos 1-d
USGS Topo · 1:48,000
1925 · San Marcos 4-a
USGS Topo · 1:48,000
1929 · Luling
USGS Topo · 1:62,500
1930 · Lockhart
USGS Topo · 1:62,500
1953 · Seguin
USGS Topo · 1:250,000
1958 · Seguin
USGS Topo · 1:250,000