Surveying in the Magdalena Mining District
Image taken: 1916by: G. F. Loughlin
© 1916 New Mexico Bureau of Geology and Mineral Resources, Historic Photograph Archives
(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