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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.
Meridians are parabolas. Standard parallels at 36°46′N/S; parallels are unequal in spacing and scale; 2:1 aspect. 1949 McBryde–Thomas flat-pole quartic = McBryde–Thomas #4: Pseudocylindrical Equal-area Felix W. McBryde, Paul Thomas Standard parallels at 33°45′N/S; parallels are unequal in spacing and scale; meridians are fourth-order ...
The term is almost always used to specifically refer to the parallels and meridians of latitude and longitude respectively in the geographic coordinate system. In modern usage, graticules are contrasted with grids , which display the eastings and northings of another coordinate reference system , such as Universal Transverse Mercator ...
The vertical lines from pole to pole are lines of constant longitude, or meridians. The circles parallel to the equator are lines of constant latitude, or parallels. The graticule shows the latitude and longitude of points on the surface. In this example meridians are spaced at 6° intervals and parallels at 4° intervals.
Pilots use aeronautical charts based on LCC because a straight line drawn on a Lambert conformal conic projection approximates a great-circle route between endpoints for typical flight distances. The US systems of VFR (visual flight rules) sectional charts and terminal area charts are drafted on the LCC with standard parallels at 33°N and 45 ...
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. The meridian meets its corresponding baseline at the point of origin, or initial point , for the land survey.
Cheat sheet design oct 13.pdf: Licensing. This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. You are free:
The Mollweide is a pseudocylindrical projection in which the equator is represented as a straight horizontal line perpendicular to a central meridian that is one-half the equator's length. The other parallels compress near the poles, while the other meridians are equally spaced at the equator. The meridians at 90 degrees east and west form a ...