Transformation Software Print

WI-SDMS Translator v2.2.3 (replaced WISCON)

WI-SDMS Translator is supported and maintained by WisDOT, replacing the unsupported WISCON program. This new WisDOT customized software tool transforms coordinate values between geographic (lat/long), State Plane Coordinates (SPC), Universal Transverse Mercator (UTM), Wisconsin Transverse Mercator (WTM), Wisconsin County Coordinate Systems (WCCS), and Wisconsin Coordinate Reference Systems (WISCRS). Datums supported include NAD27, NAD83(1986), NAD83(1991), NGVD29, NAVD 88, the new geoids and horizontal/vertical control adjustments developed by NGS, plus many more data formats.

This program is free, simply go to to register/download the software. The current production version was released in January 2012. Several bugs have been discovered and are being worked on. As of February, 2013, a contract is in place with the developer for support and maintenance to include: bug fixes, KML output format, support for the new NGS Data Sheet Format (released in May 2012), updating the Web site to include patches, tips, and a mechanism for reporting and discussing issues. Another high priority is adding support for all the latest NGS adjustments and Geoids. 

Questions concerning installing and using the current version (v2.2.3) of WI-SDMS Translator can be sent to Gene at  This e-mail address is being protected from spambots. You need JavaScript enabled to view it . There is also a help email address on the WIGST web site that will go directly to the developer.

Blue Marble Geographic Calculator (BMGC)

The BMGC supports WISCRS (Wisconsin Coordinate Reference System) and many more file formats than WISCON, however, it does not support WCCS or the CAiCE SRV or AASHTO SDMS file formats. It also has a function called Best Fit that allows you to create a conversion between various adjustments if you know several points in each system. The cost is $2500 per copy and 25% of that for annual maintenance and support.


NADCON is the federal standard software for NSRS horizontal datum transformations. The program models a transformation of geographic coordinate (latitude and longitude) values between those based on the NAD 27 and NAD 83 datums.


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.


VERTCON is the federal standard for NSRS vertical datum transformations. It computes an approximate modeled difference in orthometric height between the NGVD 29 and NAVD 88 datums based upon a latitude and longitude location.


The IGLD85 (International Great Lakes Datum of 1985) is a datum transformation tool that converts NAVD 88 Helmert heights to IGLD85 dynamic heights and vice-versa. This computation can be done interactively, or in batch mode by submitting a file of data points.


SPC83 converts NAD 83 state plane coordinates to NAD 83 geographic positions.