Transformation Software Print

WI-SDMS Translator v2.3.6 (Beta) (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, NGVD29, NAVD 88, the geoids (1999, 2003, 2009, 2012A), the horizontal control adjustments (1986, 1991, 1997, 2007, 2011), and the vertical control adjustments (1991, 2007, 2012). It also supports user defined ASCII file formats as well as KML, SDMA, and a custom WisDOT WSI data format.

This program is free, simply contact Gene Hafermann at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Note to users: be aware of several issues listed below related to v2.3.6:

  • Not all of the NAD 83 adjustment options appear in the pick lists for input and output. The developer tried to explain that was because the NAD 83 (2007) and NAD 83 (2011) adjustments are 3D while the previous adjustments were 2D. However, these conversions weren’t fully implemented anyway because GeoCON parameters weren’t yet completely defined by NGS. And the problem is that if all a user is doing is converting between file formats, they can’t select the proper input and export datums to make the metadata in the output file correct. This can be handled by using the Generic Datum syntax without the adjustment year and then manually edit the output file.
  • There is an issue with an error message that was implemented to warn users that when converting to LT and LG values, if the file format was any SDMS format, only the DDD.MMSS geographic format was applicable. However, this message is currently popping up when an SDMS format isn’t involved. You can pass by that warning if it doesn’t apply and the conversion continues.
  • There is an issue when converting from NAD 27 to NAD 83 (1991) in that the user has to do this in 2 steps. They first have to go from NAD 27 to NAD 83 (1986) and then convert the interim file from NAD 83 (1986) to NAD 83 (1991). In WISCON, this intermediate step was handled in the back ground. But now as GeoCON gets implemented, this is even more of an issue with more intermediate steps required to go from say NAD 27 to NAD 83 (2011). If you have tried the NGS on-line GeoCON, they can only handle adjoining adjustment conversions, too, and in fact, only support converting LT and LG values in one specific 80 column record format.
  • The user guide is not done for this latest beta version.
  • The WIGST.NET web site has not yet been updated to include this latest version or to add user feedback and FAQ sections. Until it does, you will be directed to the WisDOT FTP site and/or to a Dropbox link.

For questions concerning downloading, installing, configuring, and using v2.3.6 of WI-SDMS Translator should contact Gene Hafermann at This e-mail address is being protected from spambots. You need JavaScript enabled to view it or Jacob Rockweiler  This e-mail address is being protected from spambots. You need JavaScript enabled to view it .  

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.