Location and Design Division

Location and Design Division
Issued 2009 - revised July 2016

Survey Manual

The most recent version of the Survey Manual is below. This version supersedes all previous versions and incorporates all previous revisions. All future revisions will be incorporated into this online version and detailed in the “Revisions” folder.

The information provided in this electronic version of the Survey Manual is a product of, and copyrighted by, the Virginia Department of Transportation (VDOT) and is intended to be used for informational purposes only and is not to be sold or otherwise distributed for profit.

Although this data has been tested by VDOT, no expressed or implied warranties are made by VDOT concerning the accuracy, completeness, reliability and usability of this information.

VDOT assumes no responsibility for any incorrect outcomes or damage resulting from the use of this information.

All users shall expressly hold VDOT harmless from any liability or loss due to a virus or any other computer or software-generated problem associated with these files.

If you have any technical questions or problems, contact the CADD Support Helpdesk: 804-786-1280 or 1-888-683-0345.

If you have questions or problems with the content of the manual, contact Reed Adams at Reed.Adams@VDOT.Virginia.gov, John Aaron at John.Aaron@VDOT.Virginia.gov , or James Jenigen at James.Jenigen@VDOT.Virginia.gov.

GEOID 99, 03, 06
Click here to compute Geoid Separation from the NGS website.
CORPSCON Version 6.0

Corpscon, Version 6.0, is a MS-Windows-based program, which allows the user to convert coordinates between Geographic, State Plane, Universal Transverse Mercator (UTM) and US National Grid systems on the North American Datum of 1927 (NAD 27), the North American Datum of 1983 (NAD 83) and High Accuracy Reference Networks (HARNs).

Corpscon uses the National Geodetic Survey (NGS) program Nadcon to convert between NAD 27, NAD 83 and HARNs. Corpscon, Version 6.0, performs vertical conversions to and from the National Geodetic Vertical Datum of 1929 (NGVD 29) and the North American Vertical Datum of 1988 (NAVD 88).

Vertical conversions are based on the NGS program Vertcon and can be performed for the continental U.S. only.

Corpscon, Version 6.0, will also calculate geoid-ellipsoid separations based on the NGS program GeoidXX (XX = 90, 93, 96, 99, and 03). Geoid-ellipsoid separations can be calculated for the Continental U.S., Alaska, Hawaii and Puerto Rico/U.S. Virgin Islands.
Click here - Refer to the U.S. Army Corps of Engineers Geospatial web page for download and installation instructions

Virginia APELSCIDLA Regulations: Here

Leica GPS website: http://www.leica-geosystems.com/en/index.htm 
Topcon GPS website:
Trimble GPS website:

                                                                  ©2009 Virginia Department of Transportation

Page last modified: Aug. 9, 2018