Virtually all the large Cadastral Surveying is already being done with GPS.  All the Survey Contractors and BLM itself use GPS for 90+% of the cadastral survey work.  This DPPS system of BLM's has nothing to do with proposing new methods for surveying in order to save money.  It has to do with BLM deciding unilaterally that they will now convey land without monuments being set in the ground for the bulk of the State land.  Which, since less work is being done, will indeed initially save BLM money.  However, before the land can actually be used the true corners will need to be marked by someone.  So BLM is basically saying "Sorry, but we have decided that we want you to pay for the survey instead of us".  Which most of us believe is a violation of their obligations under the Statehood Act..