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Oregon GPS User Group


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Welcome to the Oregon GPS User Group

The Oregon GPS Users Group was established in 1988 to promote the use and understanding of GPS for surveying and mapping in the State of Oregon and also to cooperate in the establishment of the Oregon High Accuracy GPS Reference Network. The Users Group membership is made up of GPS users from the private sector as well as from city, county, and Federal governments. Click here for membership information. The Bylaws and Articles of Incorporation are available for review here.

Please join us for our annual Oregon User Group Meeting:

Date: June 11, 2015
Time: 9:00 am 3:00 pm
Place: Hollinshead Barn
1237 NE Jones Rd
Bend, OR 97701

Click here for details

Reminder: 2015 Membership dues are due
Check the Membership List to see if you've already paid.

User Group Officers for 2015


Chair: Jim Elam


Chair Elect: David Hills


Immediate Past Chair: Dave Wellman


Secretary: Chris Munson


Treasurer: John Minor


Webpage Custodian: Jim Lahm

GPS Survey Standards and Specifications

One goal of the User Group is to promote standards for GPS surveying and mapping. A subcommittee of the group has been formed to review existing specifications and guidelines used around the country. Listed below are some of the background documents we will be working with to develop GPS Specifications for optional use in our state.

The U.S. Department of Agriculture Forest Service and the U.S. Department of Interior Bureau of Land Management have finalized  (PDF)  "STANDARDS and GUIDELINES for CADASTRAL SURVEYS USING GPS METHODS,"   and the American Congress on Surveying and Mapping (ACSM) has recognized the standards.

The Federal Geographic Data Committee (FGDC) has approved (PDF) Part 1: Reporting Methodology, (PDF) Part 2: Standards for Geodetic Networks,  and (PDF) Part3: National Standard for Spatial Data Accuracy of the Geospatial Positioning Accuracy Standards.

The purpose of these standards is to provide a common accuracy standard model for many geographic data types, so that the accuracy of any geographic data type can be evaluated in comparison to another geographic data type. These standards do not contain the specifications for methodology and equipment which are required to achieve a certain accuracy standard.

The California Geodetic Control Committee has written the Specifications for Geodetic Control Networks Using High-Production GPS Surveying Techniques which provide guidelines for GPS methodology and equipment. These specifications build on the outdated FGCS document "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques", version 5.0, May 1988, reprinted with corrections August 1, 1989. This 1989 document was widely distributed and used; however, it was never formally adopted by the Federal Geodetic Control Subcommittee. The California Specifications update certain portions of the 1989 FGCS standards which are out of date due to GPS equipment and methodology advances.

The Survey Advisory Board of the Washington State Department of Natural Resources has written a draft version of "Standards and Guidelines for Land Surveying Using Global Positioning System Methods" which provide guidance to Land Surveyors using Global Positioning System technology.  You can view and save that document here.  

You can also contact Dave Steele, Washington DNR, at dave.steele@wadnr.gov




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