Use these on-line tools for OPUS, Inverse and Geoid Height Computations. You will also find a growing collection of File Conversion tools for COLUMBUS.

Click here to Launch the Tool

Last Updated: October 10, 2011

Calculation	Description
OPUS Least Squares	Compute the least squares coordinate solution using multiple OPUS solutions of the same point.
Geodetic Inverse	Compute five different inverse results between two geodetic stations.
Geoid Modeling	Perform geoid modeling using NGS Geoid 09, NGS Geoid 03, Albuquerque 08, Canada HT2_0, Canada GSD 95 and EGM 96.
File Conversions	Use this tool to convert third party data files to the COLUMBUS input file.

This series of online tools requires that you install Microsoft® Silverlight®. Silverlight is a cross browser, cross platform plug-in designed to deliver rich applications via the Web.

The Silverlight plug-in is available for Windows, OS X and Linux. It runs in many of the popular browsers, including Internet Explorer, Firefox, Safari, Chrome, etc.

Note: If you don't already have Silverlight installed, you will be prompted to install it when you launch the tool.

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Network Adjustment and Coordinate Transformation
Software Solutions • Since 1990