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: 328

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.

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

New Equipment Added Daily

Topcon Hiper HR GPS GNSS Base Rover Survey Kit w/manufacturer warranty

$530.00 (5 Bids)
End Date: Thursday Nov-22-2018 15:50:57 PST
Bid now | Add to watch list

Leica iCON robot 50 Robotic Total Station iCR55 w/ Leica CC80 tablet controller

$16,499.00
End Date: Sunday Dec-9-2018 14:59:03 PST
Buy It Now for only: $16,499.00
Buy It Now | Add to watch list

Trimble S8 DR PLUS 2" Robotic Total Station w/ Prism & Charger, Case 2.4Ghz

$18,499.00
End Date: Sunday Dec-9-2018 14:46:19 PST
Buy It Now for only: $18,499.00
Buy It Now | Add to watch list

Spectra TS415 Total Station Transit with Case Battery Charger & Data Cable

$1,699.99
End Date: Saturday Dec-8-2018 9:41:42 PST
Buy It Now for only: $1,699.99
Buy It Now | Add to watch list

LEICA TC407 Total Station Dual DisplayTransit Level w/ Battery, Charger and Case

$1,931.99
End Date: Thursday Nov-29-2018 6:04:08 PST
Buy It Now for only: $1,931.99
Buy It Now | Add to watch list

© 2018   © Created by Land Surveyors United   Powered by

Badges  |  Contact LSU  |  Privacy Policy  |  Terms of Service