topic Re: GPS, Orthometric height, and Geoid height in Data Management Questions

GPS, Orthometric height, and Geoid height

LukeParker — Wed, 03 Oct 2018 15:17:37 GMT

I am writing a small report critically discussing height differences occurring when using GPS, google maps and online calculators. The report doesn't allow me to discuss every point in great depth. What would you regard as the most significant points? I am already explaining the basic differences between height measured by GPS, orthometric height and Geoid height from the ellipsoid.

Once I have explained these are am going to propose what I believe is best approach when trying to identify targets on the ground.

Thanks in advance

Re: GPS, Orthometric height, and Geoid height

BillFox — Wed, 03 Oct 2018 17:25:15 GMT

Hi Luke,

This is not a light topic.

The NG911 indoor location requirements use this information too.

Here's a link to some useful GPS / mobile editing topics such as the CSU Monterey Bay Tackles High-Accuracy RTK and Elevations with Collector.

Blog - Anatum GeoMobile Solutions

-Bill

Re: GPS, Orthometric height, and Geoid height

BillFox — Wed, 03 Oct 2018 18:05:51 GMT

These too:

What would happen if GPS failed?

ArcGIS Indoors

Indoor Mapping System | ArcGIS Indoors

https://www.spar3d.com/blogs/all-over-the-map/esris-indoor-mapping-system-arcgis-indoors/