Effect of Small Errors
* From N. Bowditch, American Practical Navigator, U.S. Navy Hydrographic Office,1966 Ed.
For small regions all the map projections are the same.*
Take such statements with a grain of salt.
- The original Bowditch book is very old,
- In navigation meters of error are small,
- In geodesy a meter is small to some, large to others,
- In GPS applications a meter is big,
- To a gunner who aims at the turret ring of an enemy tank a meter is really big,
- It only takes a small curvature distortion to hide or uncover a target and on some terrain surfaces this is a frequent occurrence,
- In some real time embedded systems small errors may accumulate.
The application domain determines what is small, in M&S very accurate representations of spatial reference frameworks are required for VV&A support and to promote a level playing field.