----------------------------Original message---------------------------- Can anyone recommend a reference (or even better and on-line source) for information about what Baselines and Prime Meridians are is use for what areas in the U.S. These relate to the Public Land Survey System of townships and ranges. Thank you. -------------------------------------------------------- John A. McComb Tel: +1 703 528 8619 Arlington, VA FAX: +1 703 528 8719 USA [log in to unmask] ---------------------------------------------------------