May 4, 2021

Blue Marble Geographics releases version 8.1 of the GeoCalc Software Development Kit

Hallowell, ME – May 4, 2021 – Blue Marble Geographics® (  is pleased to announce the immediate availability of version 8.1 of the GeoCalc® Software Development Kit (SDK). The GeoCalc SDK provides developers with the advanced coordinate transformation toolkit behind Blue Marble’s Geographic Calculator, allowing them to incorporate it into their own programs. 

With the GeoCalc SDK being widely used through many industries, recent updates keep the program up to date with the most current and relevant geodetic information. The new release of GeoCalc now uses the v10.018 EPSG repository. It has added support for two newly released magnetic models, the World Magnetic Model 2020 (WMM2020) and the International Geomagnetic Reference Field 13th generation (IGRF13). Added support for projections Michigan Lambert Conformal Conic 2SP and Krovak Modified is now included, along with transformations from the updated ETJTZU 2019 libraries for Czechia.

With GeoCalc users in mind, improvements are logically integrated to make the software easier to use. Updates related to ease of use in GeoCalc 8.1 include enhanced reading of coordinate reference systems (CRS) from GeoTIFF images, better handling of areas of use defined outside the standard +/- 180 range, easier user interface controls to promote systems to Early Bound CRS types and better handling of equidistant cylindrical projection types. 

“This release of GeoCalc continues our efforts to keep up with the latest standards,” stated Sam Knight, Director of Product Management. “GeoCalc is constantly evolving to take on geodetic challenges brought to us from around the globe.”

The GeoCalc SDK is a fully object-oriented class library designed for GIS professionals and software developers. Blue Marble Geographics offers the underlying coordinate transformation capability of the Geographic Calculator within GeoCalc. More information about Geographic Calculator 2020 can be found at


ABOUT BLUE MARBLE GEOGRAPHICS: Blue Marble Geographics® is a GIS and geodetic software company that provides cutting-edge yet accessible products designed for both novice and experienced geospatial professionals. For nearly three decades, the company’s products have been used and trusted by organizations around the globe — including government agencies, universities, and Fortune 500 companies.

Blue Marble’s expertise spans a broad spectrum of the geospatial technology sector with a particular focus on coordinate conversion, lidar and photogrammetric point cloud processing, geospatial software development, and user-driven product development.

Blue Marble’s products include Geographic Calculator®, the industry standard for precise spatial data conversion and advanced coordinate system management; Global Mapper®, an all-in-one GIS application with a comprehensive array of data processing and analysis tools; and the Global Mapper Lidar Module®, a suite of powerful tools for editing and processing lidar and photogrammetric point clouds from drone-captured images. All of these desktop tools are also available as software developer toolkits and libraries.

Contact Information:
Cíntia Miranda, Director of Marketing
Blue Marble Geographics
Hallowell, ME, USA
+1(207) 622-4622 ext. 1132

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