Questions tagged [geodesy]
For questions about the geodetic functionality of Mathematica, including the functions FromDMS, GeoPosition, GeoDistance, GeodesyData, and FindGeoLocation.
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Construction of numerical solution of differential equations geodesic on the sphere
I have differential equations of geodesics. I need to solve them numerically and the solution must be on a sphere.This is what the equations looks like
The geodetic on the sphere should look like ...
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6
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2
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How to measure the volume of a 3D point cloud - not using ConvexHull or RippleyRassonRegion. Rather like "boundary" function in MatLab
RipleyRassonRegion and ConvexHull provide the smallest convex region enclosing all points in the set. For regions with real concavities, the volume of this region overestimates the actual volume. For ...
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Extracting georeferenced GIS raster data as a function of coordinates
When importing geospatial raster files, the coordinates seem to be lost, if I am not mistaken. I am not sure how to get the values of raster based on the coordinates (in whatever projection the raster ...
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How can I get the GeoVisibleRegion of a space-based camera sensor given it's altitude, lat, long, and pointing view vector with respect to nadir?
GeoVisibleRegion by itself provides the largest view attainable based on the curvature of the earth from a given altitude above the surface. How do I set up the problem for a narrower field of view ...
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Why two computations for distance half way around the world don't agree?
I understand WGS84 models the equator as a circle with radius=GeodesyData["WGS84","SemimajorAxis"]. So I expected the two computations below to be the same. Where is my mistake?
<...
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Approximate implementation of GeoDestination [closed]
I need an implementation to approximate GeoDestination without an internet connection. This is described here which says:
I need to solve "1. the direct geodesic problem".
Later that ...
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Do you agree GeoDirection should return 90 degrees in this example?
GeoDirection[{38,-76},{38,-75}]
(* 89.6922 Degrees *)
I am using version 12.0.0.
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Geodesics on arbitrary 2D surfaces
Geodesics on 2D Function Surfaces
I am trying to approximately find the shortets path between two point on a surface defined as z=F[x,y]. I am solving for X,Y as function t. However, when trying to ...
12
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2
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What fraction of a mountain parcel has slopes over 15%?
Update: The original error was not from the elevation data, but from the use of "Degree". See below.
An agency interested in purchasing heavily sloped land has decided to use a criterion ...
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Maximizing the interior angles of a triangle on the Earth [closed]
Gauss once surveyed a triangle in the Harz mountains formed by Inselberg, Brocken, and Hoher Hagen to check if the sum of the interior angles really added up to $\pi$ radians. With the precision ...
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Error of Points in Mollweide Projection
I am currently working on a project using SnIa data and using Mathematica I have obtained the following points (in degrees) through the maximum likelihood process
...
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2
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Geodesate extract angles and edges length of a polyhedron
I'm using Mathematica 11, don't have access to new functions in Geodesate.
Edited to clarify my question
What I aim to do, it is to extract the angles and length of edges of a polyhedron (also in ...
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Mollweide Projection of a Sphere [duplicate]
I want to recreate the following picture
for a project. However, I am not sure how to do this with Mathematica. Is there an easy way to obtain just the "background" picture of the sphere without the ...
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Converting from UPS(x, y) to geodetic latitude/longitude
I'm trying to create a program which converts latitude/longitude (wgs84) to UPS (Universal Polar stereographic) coordinates, and then UPS(x, y) to WGS 84. I mean Given UPS(x, y), be able to compute ...
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