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Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS.. The following are the principal and guide meridians and base lines of the United States, with the year established and a brief summary of what areas' land surveys are based on each.
This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS.. In the United States Public Land Survey System, a principal meridian is the principal north–south line used for survey control in a large region, and which divides townships between east and west.
List of principal and guide meridians and base lines of the United States; 0–9. First principal meridian; Second principal meridian; Third principal meridian;
Principal meridian (PM): A true meridian running through an initial point, which together with the baseline form the highest level framework for all rectangular surveys in a given area. The list of all principal meridians is given below. Public domain (land): Land owned and managed by the Federal government. Synonymous with public lands.
The Fifth Principal Meridian, also known as the "5th Principal Meridian" and "PM 05", is a principal meridian survey line used in the United States for land claims in the Public Land Survey System (PLSS). It was first surveyed in 1815. The meridian, a north-south line, starts from the old mouth of the Arkansas River and runs north.
The San Bernardino meridian, established in 1852, [1] is one of three principal meridians in the state of California. Because of the state's shape, three meridian– baseline sets are required for surveys in all parts of the state.
The five principal meridians of Alaska are the Copper River meridian (established 1905), ... "Principal Meridians and Base Lines". U.S. Bureau of Land Management.
In Canadian land surveying, a base line is one of the many principal east-west lines that correspond to four tiers of townships (two tiers north and two south). The base lines are about 24 miles (39 km) apart, with the first base line at the 49th parallel , the western Canada–US border .