• #### Blog Post The Spilhaus map of the oceans will be supported in the next release of ArcGISThe Spilhaus map of the oceans will be supported in the next release of ArcGIS

In the upcoming release of ArcGIS 10.8 and ArcGIS Pro 2.5, the Spilhaus World Ocean Map in a Square will be supported as aprojected coordinate system based on the Adams square II map projectio...
• #### Blog Post Map Projections in ArcGIS Story MapMap Projections in ArcGIS Story Map

Here is a story map about map projections in ArcGIS: https://storymaps-nextgen.arcgis.com/beta/stories/ea0519db9c184d7e84387924c84b703f   It shows a gallery of 68 map projections supported by pro...
• #### Blog Post Two new map projections available in ArcGIS 10.7 and Pro 2.3Two new map projections available in ArcGIS 10.7 and Pro 2.3

The Equal Earth, an equal-area projection, and the Peirce quincuncial, a conformal projection, are now available in ArcGIS 10.7 and ArcGIS Pro 2.3.   The Equal Earth is an equal-area pseudocylindrical ...
• #### Blog Post Planetary Coordinate Systems: The MoonPlanetary Coordinate Systems: The Moon

Planetary Coordinate Reference Systems There is an interesting but perhaps little-used folder of *.prj files called “Solar System”. As someone interested in geodesy and its application it is particula...
created by spk578
• #### Blog Post Distance on an ellipsoid: Vincenty's FormulaeDistance on an ellipsoid: Vincenty's Formulae

Vincenty's Formulae are two methods named after Thaddeus Vincenty a Polish-American geodesist who lived during the 20th Century. During his career, he devised his formulae as well as contributing to major project...
created by spk578
• #### Blog Post Distance on a sphere: The Haversine FormulaDistance on a sphere: The Haversine Formula

I decided to look into some of the mathematics that makes it possible to calculate distances considering 3D space, for example, calculating distance on a sphere. You can find our more on geodesic distances from the pr...
created by spk578
• #### Blog Post Global Geodetic Reference Frame (GGRF)Global Geodetic Reference Frame (GGRF)

Introduction The Global Geodetic Reference Frame (GGRF) is the realisation of the Global Geodetic Reference System (GGRS). The GGRS comprises terrestrial and celestial components allowing users to precisely...
created by spk578
• #### Blog Post New map projections supported in ArcGIS 10.4New map projections supported in ArcGIS 10.4

ArcGIS 10.4 now supports eight small-scale map projections displayed in an animated gif: Compact Miller Patterson Natural Earth Natural Earth II Wagner IV Wagner V Wagner VII Eckert-Greifendorff   The Eckert-Gr...