Global COGO, Inc.

3-D Coordinate Geometry & Error Propagation

Based Upon the
Global Spatial Data Model (GSDM)

(Website established October 1997 - last modified July 8, 2022)
Email to Global COGO, Inc.

This site describes 12 different 3-D projects included in Chapter 15 of the 2nd Edition of "The 3-D Global Spatial Data Model (GSDM)."

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(Of course, you could also just buy and use the book!)

1. Supplemental Control at NMSU click here.

2. Hypothesis testing at station BROMILOW click here.

3. Terrestrial observations for 3-D position of "finial" on Skeen Hall click here.

4. No distortion solution - USPLSS example click here.

5. NM Initial Point and Principal Meridian click here.

6. Rio Grande River boundary NM and Texas click here.

7. First-order GPS leveling example in Wisconsin - pages 57, 58, and 59 at click here.

8. NAVD 88 elevation on HARN Station REILLY click here.

9. NEXRAD Installation in Tucson - Shadow Height click here.

10. Location of NMSU Assoc. Eng'r Dean's desk in Goddard Hall by geodetic, state plane, and GSDM - compare methods.

11. Underground Mapping Revisited click here.

12. Layout of parallel of latitude using the GSDM click here.

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