Skip to main content
Question

Inverse 3D geodetic distance calculation

  • November 7, 2013
  • 2 replies
  • 39 views

Forum|alt.badge.img+1
On the NGS website, at:

 

http://www.ngs.noaa.gov/TOOLS/Inv_Fwd/Inv_Fwd.html

 

there are tools for calculating an inverse 3d geotetic distance calculation.

 

 

Does FME duplicate this functionality?  If so, how?
This post is closed to further activity.
It may be an old question, an answered question, an implemented idea, or a notification-only post.
Please check post dates before relying on any information in a question or answer.
For follow-up or related questions, please post a new question or idea.
If there is a genuine update to be made, please contact us and request that the post is reopened.

2 replies

fmelizard
Safer
Forum|alt.badge.img+22
  • Safer
  • November 7, 2013
Hi,

 

 

As in most things FME you will need to spend some time and create the tool yourself. For this kind of calculations a number of transformers come to mind, most probably the ExpressionEvaluator is something you should look into.

 

 

Itay

Forum|alt.badge.img+1
  • Author
  • November 7, 2013
I really don't think the ExpressionEvaluator will be enough.  I need to transform from an arbitrary planar coordinate system to a spherical system mapped to the GRS80 ellipsoid, measure the difference in straight line lengh to account for the curvature of the earth at that particular location, and convert the result back into the units of the first coordinate system.