Questions tagged [geographiclib]

C++ classes for coordinates conversions, for geomagnetic field calculations, and for solving geodesic problems.

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11
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2answers
2k views

Making Great Circle Arcs which look good on Web Mercator map?

I'm trying to create a map, with data indicating some flights, and want to use Great Circle Arcs, to connect the source and destinations. Basically, I want to do something similar to the famous ...
3
votes
1answer
54 views

Why are topocentric coordinates of point A relative to point B not strictly the negative of the topocentric coordinates of point B relative to point A

I just tried to play around with some geodesy lately, using CartConvert in bash: $ echo -43.4242920E -22.9145118N 0 | CartConvert -l -43.7954220E -22.7454621N 0 38072.841396 -18768.489365 -141.336023 ...
3
votes
1answer
78 views

Using GeographicLib's LocalCartesian to translate LiDAR (LAS format) data onto an SBET file in WGS84

I've been working for a while now to combine LAS 1.2 formatted LiDAR data with a matching SBET file to fill in the LASF_X/Y/Z fields in the LAS file. The matching of LiDAR points to SBET trajectory ...
2
votes
1answer
3k views

Find rectangle around point with python?

Given a point, latitude and longitude, how would one find the coordinates of a rectangle centered on that point with a known width and height in meters? I tried using the Geodesic stuff from ...
1
vote
1answer
275 views

Installing Geographiclib with QGIS

I am trying to install the package "geographiclib-1.20.tar.gz" Referring to a previous post to install 3rd Party libraries here. I ran OSGeo4W Shell and tried to use pip. This is the error ...
1
vote
1answer
58 views

GeoGraphicLib and custom forward

I need to project data which can be nearby the poles, and I want to use a custom transverse mercator projection for a number of reasons. Using GeographicLib (either TransverseMercator or ...
1
vote
0answers
241 views

Closest projection to GeographicLib's Local Cartesian

We are using the excellent GeographicLib https://sourceforge.net/projects/geographiclib/ in our application, a professional ship simulator. Our 3D scene is rendered using a Local Cartesian projection ...
1
vote
0answers
202 views

Finding angle to north on image with three control points

So I am working on some software that geolocates spots on a map taken from a drone. I am having some trouble with the actual geolocation when the map that the program is given is not aligned north. ...
0
votes
1answer
1k views

Using azimuths and bearings in GeographicLib? [closed]

I am currently using the JavaScript port of the geodesic routines from GeographicLib: https://geographiclib.sourceforge.io/html/js/ https://github.com/yurijmikhalevich/node-geographiclib I am ...