This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
U.S. Coast Survey Triangulation Map of Matagorda Bay to Galveston Bay Texas Geographicus GalvestonMatagordauscs. An attractive example of the Coast Survey's triangulation chart of the Texas coastline from Lamar and San Antonio Bay to Matagorda bay and Galveston Bay Shows the primary triangulation points used in setting up the