Global COGO, Inc. and Tru3D

3-D Coordinate Geometry & Error Propagation

Based Upon the Global Spatial Data Model (GSDM)

(Tru3D website established June 2017 - last modified July 20, 2020)

Email to Global COGO, Inc.



This web page is an interim connection betweeen the previous Global COGO, Inc. web site and a new web site (Tru3D.XYZ) being developed to highlight the true 3-D nature of geospatial data as described in the Second Edition of "The 3-D Global Spatial Data Model: Principles and Applications."

Previous web sites continue to be accessible. Original 1996 and Revision 1 2017. The page being viewed is Revision 2 - 2020.


**** 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. **** March 2, 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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