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Geographic Calculator: The global coordinate transformation tool - Download Now >

For over 25 years, Geographic Calculator has been universally recognized as the leading geodetic toolkit for accurate coordinate conversion and datum transformation.

Geographic Calculator Overview

Geographic Calculator is a powerful geodetic application with particular strength in survey, seismic, and energy exploration. In addition to single point, point database, and file conversion tools, this highly accurate transformation software includes many specialized tools such as Canadian DLS (Dominion Land Survey) Land Grid tools, Seismic Survey Conversion tools, Area of Use tools for guiding users to the most appropriate transformation settings for a specific location, Horizontal Time-Dependent Positioning (HTDP), Geoid Creation tools, and much more. Geographic Calculator supports a wide range of file formats and is built on the foundation of the largest geodetic parameter database available anywhere. When transformations have to be correct, consistent and certifiable, GIS professionals around the world choose Geographic Calculator.

Point Database Conversion
Point Database Conversion

Globe icon Point Database Conversion
Angular Unit Converter
Angular Unit Converter

Globe icon Angular Unit Converter
Area Calculation
Area Calculation

Globe icon Area Calculation

Geographic Calculator provides a single platform for highly accurate coordinate transformation of virtually any type of geospatial data and includes features such as:

  • Support for reading and writing Coordinate Systems and Transformations to and from Petrel™ CTL files
  • Access to the new GeoCalc Geodetic Registry, a cloud-based hosted library of geodetic parameters
  • Support for Windows 10 machines and improved installation process
  • XML-based geodetic parameter library
  • Project Manager for data processing, jobs, and workflow management
  • Start Page offering a user-friendly introduction to the key features and functions
  • Administrative Tools to customize the datasource and restrict editing access
  • Unmatched Geoid or Vertical Datum support, including VDatum support
  • Powerful Survey Seismic format support including new Seismic Survey QC Job
  • Raster Geo-referencing, Reprojecting, and Vector File Translation Tools
  • The ability to customize and send all or part of your GeoCalc datasource to Global Mapper
  • Esri Extension and powerful CAD support

Designed Efficiency

The 2016 version introduced a completely redesigned interface to streamline workflow and to provide easy access to the important components of the application.

The all-in-one interface of Geographic Calculator enables users to complete a number of geodetic and geospatial transformation functions on various types of data in the same interface with unmatched accuracy and accountability. The enterprise collaboration tools, such as workspaces and network folders, enable consistency and repeatability of highly accurate data translation across your organization.

For new users, a consolidated Start Page provides clear and concise explanations for each type of calculation and serves as a launching pad for easy access to the various jobs. Intuitive menus and toolbar buttons facilitate efficient data processing. The Point Database Conversion job is split into five logical components: Conversion; Forward/Inverse Calculation; Scale and Translate; Best Fit; and Derive Datum Shift. This simplified approach provides a unique and intuitive interface for each type of calculation. The highlight of the 2017 release is the introduction of a new Seismic Survey QC Job for checking the quality of preplot and poststack seismic lines between UKOOA and SEG-Y files.

Recent releases have seen the introduction of a new Seismic Survey QC Job for checking the quality of preplot and poststack seismic lines between UKOOA and SEG-Y files, an updated, and more user-friendly interface, a universal copy and paste function, a new angular unit conversion tool, and support for NADCON 5.0. For more details on new features visit our the latest changes page.

For more details on new features visit our latest changes page.

Blue Marble Desktop: Twenty-Five Years of Geodetic Accuracy

Since 1993, Geographic Calculator has been the coordinate conversion tool of choice for GIS and survey professionals around the world. The software quickly grew in popularity over that first decade and has maintained its reputation as the best coordinate conversion solution on the market. Geographic Calculator has come a long way since then with many improvements over the years. In 2004, the underlying GeoCalc library was re-written and in 2007 a new version was released as the Blue Marble Desktop.

2013 saw a rebranding of the Blue Marble Desktop to Geographic Calculator. Blue Marble incorporated all of the functionality of the Desktop including the Geographic Transformer, Translator and Spatial Connect products into Geographic Calculator.