8 releases
Uses old Rust 2015
0.1.7 | Sep 11, 2016 |
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0.1.6 | Aug 25, 2016 |
0.1.4 | Jan 28, 2016 |
#217 in Geospatial
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Used in 3 crates
(via libits-client)
11KB
226 lines
rust-navigation
This is a very simple navigation crate intended for use with autonomous vehicles. It simply provides functions to calculate the required bearing to navigate between two waypoints based on latitude and longtitude.
Two methods are provided - an accurate algorithm and a faster estimation method based on simple 2D trigonometry that does not take into account the fact that the earth is round. The latter approach is much lighter computationally and accurate enough for calculating bearings between points in a small area, such as a parking lot.
Example
Which direction should I go to get to Denver International Airport from Boulder, CO?
let dia = Location::new(39.8617, -104.6731);
let boulder = Location::new(40.0274, -105.2519);
Accurate calculation
let bearing = boulder.calc_bearing_to(&dia); // results in 110.48
Fast calculation
let bearing = boulder.estimate_bearing_to(&dia); // results in 110.44
Sample output from unit test comparing the two methods
(40.091306, -105.185494) -> (40.090405, -105.185087): bearing=160.9 estimate=160.9 diff=0.1 [OK]
(40.090801, -105.185641) -> (40.091439, -105.184771): bearing= 46.2 estimate= 46.3 diff=0.1 [OK]
(40.090960, -105.185871) -> (40.090342, -105.184860): bearing=128.6 estimate=128.5 diff=0.1 [OK]
(40.091311, -105.185128) -> (40.090946, -105.184925): bearing=157.0 estimate=156.9 diff=0.1 [OK]
(40.091150, -105.185586) -> (40.091221, -105.185793): bearing=294.2 estimate=294.1 diff=0.1 [OK]
Dependencies
~315–540KB