Differences between NGVD29 and NAVD88 in Southeastern Wisconsin
Publication: Journal of Surveying Engineering
Volume 123, Issue 2
Abstract
The Southeastern Wisconsin Regional Planning Commission (SEWRPC) has, over the past 30 years, established and promoted use of elevations referenced to the National Geodetic Vertical Datum of 1929 (NGVD29). Through international agreement, cooperation, and participation the vertical datums for the entire North American continent were recomputed, readjusted, and published as the North American Vertical Datum of 1988 (NAVD88). This paper summarizes a report prepared to describe differences between those vertical datums throughout the seven-county region served by SEWRPC. The report also includes a brief discussion of the International Great Lakes Datums (IGLD) and describes how IGLD 1985 is related to NAVD88. Conclusions published in the report are that within the seven-county SEWRPC region: (1) third-order datum differences can be interpolated from an isohypsometric map available from SEWRPC; (2) second-order datum differences can be obtained using VERTCON, an interpolation program available from the National Geodetic Survey, Silver Spring, Md; and (3) datum differences at first-order benchmarks should be determined on the basis of field surveys using first-order equipment and observational techniques.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bauer, K.W., and Burkholder, E. F.(1996). “Simplified transformation between NAD27 and NAD83 in southeastern Wisconsin.”J. Surv. Engrg., ASCE, 122(1), 26–39.
2.
Milbert, D. G. (1994). “Readme file.”VERTCON version 2.0, Nat. Geodetic Information Ctr., Silver Spring, Md.
3.
Schwarz, C. R. (1989). North American Datum of 1983. Nat. Geodetic Survey Information Ctr., Silver Spring, Md., NOAA Profl. Paper NOS 2.
4.
Southeastern Wisconsin Regional Planning Commission (SEWRPC). (1990). “Horizontal and vertical survey control in southeastern Wisconsin.”Tech. Rep. No. 7, 2nd Ed., Waukesha, Wis.
5.
Southeastern Wisconsin Regional Planning Commission (SEWRPC). (1994). “A mathematical relationship between NAD27 and NAD83(91) state plane coordinates in southeastern Wisconsin.”Tech. Rep. No. 34, Waukesha, Wis.
6.
Southeastern Wisconsin Regional Planning Commission (SEWRPC). (1995). “Vertical datum differences in southeastern Wisconsin.”Tech. Rep. No. 35, Waukesha, Wis.
7.
Zilkoski, D. B. (1992). “North American vertical datum and international Great Lakes datum: they are now one and the same.”Proc., U.S. Hydrographic Conf., Hydrographic Soc., Rockville, Md.
Information & Authors
Information
Published In
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: May 1, 1997
Published in print: May 1997
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.