Global COGO, Inc.

3-D Coordinate Geometry & Error Propagation

Based Upon the Global Spatial Data Model (GSDM)

(Website last modified September 17, 2021)

Email to Global COGO, Inc.


A major update to this web site is planned which will highlight the impact of digital data and the 2022 datums. In the meantime, the following three items could/should be of interest. . .

**** "Reconciling Gravity and the Geometry of 3-D Digital Geospatial Data" makes the case for using geodetic height for the third dimension. click here Sept 16, 2021

**** "Same Page Geometry" stresses the importance of various disciplines using common geometry (including AI & M/L). click here Sept 4, 2021

**** "By Comparison, the GSDM is Simple" looks at efforts to make spatial data easier to use. click here Sept 17, 2021


**** Click here for access to previous Global GOGO, Inc. web page - version A - Sept 16, 2021.

**** Click here for access to previous Global GOGO, Inc. web page - version B - Sept 16, 2021.

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**** ASCE Discussion and validation of the integrity of the 3-D Global Spatial Data Model (GSDM) click here. June 5, 2020

**** The spatial data community deserves a better alternative than low-distortion-projections. click here. ***** June 6, 2020.

**** Link to "The Role of a Model" writing project Click here. **** January 5, 2020.

**** Articles - ASCE, U.S. Copyright Articles, NMPS Benchmarks, Board of Licensure etc. Click here. **** September 28, 2020

**** Personal (EFB) - Resume, Master's Thesis, Awards, POB career story, Visit Oregon Tech Click here. **** January 5, 2020.

**** Second Edition of book - "The 3-D Global Spatial Data Model," CRC Press Flyer, Reviews, Purchase, and Corrections. Click here. **** January 5, 2020.

**** Promoting the Global Spatial Data Model (GSDM), Click here. **** May 12, 2020.

**** Twelve different projects are described in Chapter 15 of the 2nd Edition of the 3-D book Click here. **** July 20, 2020.

**** Items related to education and professions, Click here. ***** March 17, 2020.

**** Miscellaneous items - Conformal projection paper by Rollins/Meyer, Click here. **** January 5, 2020.


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