The purpose of trail mapping is to lead OCTA and local chapters in the mapping of the historic overland trails, the primary objective being trails preservation.

The California Nevada Chapter trail mapping teams work closely with National Park Service, Bureau of Land Management, US Forest Service, and private land owners plus any other entities that administer lands containing trail remnants.  The trail mapping teams work to ensure accurate mapping following the guidelines and symbols of the Mapping Emigrant Trails (MET) manual.


MET Manuals

MET Manual Edition 5 Cover PDF File
Preface and Introduction PDF File
Part A Investigative Procedures & Trail Classifications PDF File
Part B GPS and Mapping Software PDF File
Part C Planning and Executing a Mapping Project PDF File
Part D Setting Classifications PDF File
Part E Photo Documentation of Trails PDF File
Appendix 1 Documentary Sources for Overland Trails PDF File
Appendix 2 Examples of the Composite Trail Description Method PDF File
Appendix 3 Public Land Survey System PDF File
Appendix 4 Trail Terminology PDF File
Appendix 5 Plotting on USGS Topographic Maps PDF File
Appendix 6 NHT Condition Category Definitions PDF File
Appendix 7 Universal Transverse Mercator (UTM) Grid PDF File
Appendix 8 Internet Map Sources PDF File
Appendix 9 OCTA Policies PDF File
Appendix 10 Artifact Research/Identification Resources PDF File
Appendix 11 Artifact Recording Forms PDF File
Appendix 12 Using and Plotting Magnetic Compass Directions PDF File
Appendix 13 Terrain Navigator Pro Basics PDF File