nav-types

This crate is designed to make it easy to work with positions and vectors that have meaning as geographic entities.

Note about usage

The source is based on nalgebra and some methods are only available if importing traits from nalgebra.

Performance

Currently the only way to calculate vectors between latitude and longitude positions is to convert to ECEF format and calculate the difference there. This conversion happens behind the scenes and for this reason could be a source of some surprise. It is therefor advised to try and use ECEF for as long as possible only converting to and from at the beginning and end.

To see these result in action run the benchmark tests which shows the difference between the formats.

Example

extern crate nav_types;

use nav_types::WGS84;

let pos_a = WGS84::new(36.12, -86.67, 0.0);
let pos_b = WGS84::new(33.94, -118.40, 0.0);

println!("Distance between a and b: {:.2}m", a.distance(&b));

All position formats can work with vectors as long as the vectors are defined in some coordinate system.

use nav_types::{WGS84, ENU};

let pos_a = WGS84::new(36.12, -86.67, 0.0);

let vec = ENU::new(0.0, 0.0, 10.0);
let pos_a_10m_up = pos_a + vec;