Good morning

This is Philos I'm surveyor, on my site we are using WGS84 Datum, can someone assist me how to calculate the height datum?

Regards

This Content Originally Published by a land surveyor to Land Surveyors United Network

Views: 344

See Your Saved Posts Timeline

☇ Reply to this

Replies to This Discussion

Dear Mr. Chams,

It is impossible to answer your question with particular certainty. In order to do so, one needs to know the location of your survey, the desired datum to which you wish to refer the height. It may further require knowing the appropriate geoid model.

WGS84 coordinates are 3-D. They may be expressed as X, Y, Z Cartesian coordinated from the center of mass of Earth or as Latitude, Longitude, and Ellipsoid Height. If it is elevation (orthometric height) you wish, then one must subtract the geoid height from the ellipsoid height to approximate the orthometric height (elevation).

That assumes you have proper 3-D WGS84 coordinates. Perhaps your horizontal position is good but the ellipsoid height is poor. In that case, the direct solution is to find a reliable benchmark and level from there to your points of interest.

JAC

yes anthony you are right 

RSS

Where Thousands of Professional Land Surveyors, Students of Surveying and Educators are United through Collaborative Knowledge and Purpose.

Land Surveyors Forum

Control surveying problem

Started by shree ram bhandari in Land Surveying Jobs. Last reply by Billy Brooks on Saturday. 11 Replies

Magnetic North Update

Started by Billy Brooks in Surveying Best Practices. Last reply by Billy Brooks Feb 6. 2 Replies

AERIAL STEREOSCOPY

Started by Lalith Senanayake in Surveying Related Links. Last reply by shree ram bhandari Feb 12. 4 Replies

Job Quotation

Started by Nitesh Shrestha in Land Surveying Jobs. Last reply by Nitesh Shrestha Jan 21. 3 Replies

Survey under tree canopy

Started by Massimo in Surveying Best Practices. Last reply by Maurice Heter on Saturday. 7 Replies

Mean Sea Level (MSL)

Started by Chuck Turlington in Geospatial Industry Types. Last reply by Kim Noblitt Jan 17. 6 Replies

Surface pro

Started by Malik in Surveying Field Tips and Tricks. Last reply by Kevin D. Allen Jan 7. 5 Replies

ROOF PEAK SURVEY

Started by Mthulisi Mloyi in Professional Advice for New Surveyors. Last reply by ⚡Survenator⌁ Jan 4. 2 Replies

Tools,Apps and Quick Guides

DEDICATED TO THE MEMORY OF SKIP FARROW (1953-2015)


Help With Survey Equipment

Social Support For Equipment

Surveying Video Categories

Surveying Photo Categories

United States Hub Forums

International Surveyor Hub Forums

Resources for Company Owners

Land Surveyor Social Media

Surveyor Resources Collections

Getting Started & Newsletter

Featured Land Surveyor Hubs

© 2019   © Created by Land Surveyors United   Powered by

Badges  |  Contact LSU  |  Privacy Policy  |  Terms of Service

Site Explorer