Tag: Historical Topographic Sheets

NGS Enabling Historical “T-Sheets” to be Accurately and Efficiently Geo-referenced

NGS

NGS Enabling Historical “T-Sheets” to be Accurately and Efficiently Geo-referenced Historical Topographic Sheets (“T-Sheets”) produced by the U.S. Coast and Geodetic Survey are referenced to various horizontal datums in use over the two hundred years since the first Survey of

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