Method and apparatus for optimally transforming location coordinates from a global system GC1 of survey coordinates to a local system LC1 of coordinates in a location survey. Linear translation transformations T.sub.G1 and T.sub.L1 are determined that translate the GC1 coordinates ...http://www.google.com.au/patents/US5774826?utm_source=gb-gplus-sharePatent US5774826 - Optimization of survey coordinate transformations
