The geodesy tag has no wiki summary.
15
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5answers
5k views
Trilateration using 3 latitude and longitude points, and 3 distances
I want to find out an unknown target location (latitude and longitude co-ordinates). There are 3 known points (latitude and longitude co-ordinate pairs) and for each point a distance in kilometers to ...
8
votes
2answers
2k views
How do you compute the earth's radius at a given geodetic latitude?
(I see there is an equation on wikipedia that does exactly what I am asking but there is no references. I have no way of confirming the validity of this equation!)
I already understand the difference ...
2
votes
3answers
1k views
How to perform trilateration using 3 lat/lon points without distances?
I read this thread Trilateration using 3 latitude and longitude points, and 3 distances explaining about trilateration using 3 latitude and longitude with measured distance.
The problem is I want to ...
19
votes
2answers
290 views
Are ellipsoids a mathematical necessity?
The literature usually just tells us that the Geoid is complex to describe mathematically and that we therefore fit different Ellipsoids to approximate it.
Are these Ellipsoids mathematically ...
6
votes
3answers
311 views
How to generate geodesic linestring from two points in C#
I'm looking for a FREE C# class, library or set of functions that will allow me to generate a geodesic linestring (or array of vertices, whatever) from two decimal degree points.
I've found ...
1
vote
1answer
74 views
Which SRS is computational more effective to store continental scale data? (given some conditions)
For a Precision Agriculture application I need to make calculations in UTM projection. The data will be stored in Postgis and is made of soil samples results (point data) and field boundaries of many ...
