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Surveying in the Magdalena Mining District

Surveying in the Magdalena mining district

G.F. Lauglin locating point with plane table on a rhyolite spur south of South Camp in the Magdalena mining district

Image taken: 1916
by: G. F. Loughlin
© 1916 New Mexico Bureau of Geology and Mineral Resources, Historic Photograph Archives

Longitude: -107.221266
Latitude: 34.100243
  (WGS 84 or NAD 83)

About this image

Early geologists used a plane table and alidade to create topographic maps as a base for geologic mapping. The widespread availability of topographic maps, photogrammetry, and LIDAR have made this method of mapping obsolete.

Image posted: 12-17-2021