3-D Coordinate Geometry & Error Propagation

Based Upon the Global Spatial Data Model (GSDM)

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The impact of AI on spatial data is critical and discriminating between Tru 3-D and Pseudo 3-D is important.

       -----   The global spatial data model (GSDM) in a  nutshell.  See also Innovator's  Dilemma.  posted November 27, 2023.

       -----   Report & comments on National Geospatial Advisory Committee (NGAC) meeting on October 12, 2023  Click here.   posted November 27, 2023. 

       -----  Conceptual Development of True 3-D vis-a-vis Pseudo 3-D   Click here  October 5, 2023.  Or, just to see the 3-D Timeline Click here.  April 21, 2023.

       -----  Updated Figure 6 from 1991 paper showing original usage of "True 3-D" and "Pseudo 3-D" Click here.   June 26, 2023.

       -----  Artificial Intelligence (AI) is being used in ChatGPT, Bing, Bard, & others. Examples related to AI and 3-D using ChatGPT.   March 2023 and November 2023.
       -----  Tru 3-D is compatible with CORS, HD Maps, and AI. See Carlsbad CORS.   February 2023.
NIST!---  Proposal to NIST for standardization  Memo  actual proposal and justification Why GSDM?  January 2023

       -----  Comparing Tru 3-D with Pseudo 3-D click here. 

       -----  Looking at impact of gravity click here. 

       -----  By comparison, the GSDM is "Simple." click here. 

       -----  Summary of NSRS Modernization challenge AGU poster.

       -----  The Role of a Model is CRITICAL! click here. 

       -----  A 3D perspective includes more than just spatial data and geometry. 

       -----  Comments on NMGAC virtual meeting February 14, 2023 click here. and May 9 2023 click here.

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This web page first posted November 7, 2020 and last updated 12/03/2023.
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