Spherical geometry is the geometry of the two-dimensional surface of a sphere.
0
votes
1answer
46 views
Rhumb lines intersection
I looking for algorithm how to find out whether two rhumb lines given by point1 with azimuth1 and point2 with azimuth2 have intersecting point. Have anyone idea how to find intersection ?
For ...
3
votes
0answers
105 views
Bearing/Course/Heading in WGS84 ellipsoid model
There is a common formula for computing the initial bearing for a course from lat1, lon1 to lat2, lon2. (And yes, I'm aware that the course will change when traveling).
atan2( sin(lon2-lon1) * ...
2
votes
0answers
55 views
Find arc endpoint with bearing and radius counting with curvature of the earth?
So my problem is that I have start point [lat,long] for arch, bearing, radius and I need compute end point [lat,long] ? End point should be in 180 degrees angle from start point and I should be aware ...
2
votes
0answers
87 views
Centroid of the equator and a point
Suppose I already have a way to compute the centroids of different geometry types:
Points (arithmetic mean of Cartesian coordinates).
Linestrings (polylines) (weighted mean of segment mid-points in ...
2
votes
0answers
67 views
Placement of a fixed-radius circle on a sphere to maximize point containment
There are many papers on the "Circle Placement Problem" in 2D Euclidean space, but I haven't been able to find any papers discussing this problem on the sphere. The problem is: given a set of points ...
0
votes
0answers
260 views
Implementing custom (Vincenty/Haversine formula) functions for MySQL vs Using PostGIS?
I currently am using MySQL for all of my relational data. I have hit a crossroads with geo calculations. Since, MySQL does not have good support for spatial functions, I am contemplating on using ...
