Spherical geometry is the geometry of the two-dimensional surface of a sphere.
Questions tagged [spherical-geometry]
178 questions
7
votes
2 answers
Find tangent point on circle furthest east or west
There are few ways of articulating my question. It starts with a known circle on a sphere, i.e. a point-radius, and one that does not cover a pole. I would like to calculate the point furthest west on this circle and the point furthest east. These…
David Smiley
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5
votes
1 answer
What information is needed to determine the section of the earth's surface visible in a photograph?
What information (either provided by a user or taken from sensor readings) would be required to determine the geographic area encompassed by a photograph? It seems like the area visible from a photograph would be a rectangle projected onto the…
Brendan Dolan-Gavitt
- 153
- 4
5
votes
2 answers
What is a delta in lat/lon called?
What is the delta between two lat/lon pairs called? Delta degrees? Arcs?
Is it some quantity of distance but what is its unit of measurement?
And related: Can we use pythagoras to calculate this distance?
eg. d = (0, 3) and (4, 0) = 5?
RickyA
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1
vote
2 answers
Calculating third coordinate on earth given two points and their distances to third point EPSG:4326 (WGS84)
I am trying to find the latitude and longitude of a 3rd point on a map with EPSG:4326 (WGS84) projection. I know the coordinates of two other points and the distance in meters to the 3rd point. Ideally, I am trying to create a function to return…
Brad w
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1
vote
1 answer
Calculate vx, vy and vz components from Lat,Lon, height and Time
Referring to the following post Calculate velocity x and y components from Lat,Lon and Time
Given the two points with Latitude, Longitude, Height and time
P0 = (Lat0,Lon0, h0, time0)
and
P1 = (Lat1,Lon1, h1, time1)
how can we calculate the…
ravindraji4
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