GeoTalks Express – Managing 3D Coordinate Systems using Global Mapper and Geographic Calculator

Wed Mar 17, 2021
02:00 PM - 03:00 PM EDT

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Over recent years there has been a significant increase in the availability and use of 3D geospatial data, which is evident in Global Mapper’s continually expanding 3D functionality. Previously, the primary concern of geodesists was the accuracy and positional integrity of data from a horizontal perspective, but the focus is increasingly shifting to address vertical frames of reference. For many years, Geographic Calculator has included tools for conducting vertical datum transformations on all types of 3D data, such as databases of numeric coordinates, vector-based maps, lidar or other point clouds, or raster surface models. In each of these cases, the Z- or height value is based on a vertical reference system and transforming from one to another must be done properly or any subsequent analysis will be flawed. Now, Global Mapper users can access these advanced geodetic tools by enabling GeoCalc mode providing advanced projection management functionality. In this GeoTalks Express presentation, we explore Geographic Calculator’s 3D coordinate management capabilities and how they can be applied to Global Mapper.

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