meos

Rust bindings for meos C API.

The supported meos version is >= 1.1

Disclaimer

The crate is still in alpha, this means it is not advised for production usage as some tests are still to be added and not proper CI workflows are inplace. This project is checked with valgrind, but if you stumble on a crash feel free to open an issue explaining the problem.

Usage example

You can check the examples in the examples/ directory.

Constructing trajectories from text:

use meos::{meos_initialize, TPoint};

meos_initialize("UTC");

let trajectory: TGeomPoint = "[POINT(1 1)@2000-01-01 08:00, POINT(2 2)@2000-01-01 08:01]".parse().unwrap();

Get the shortest distance ever between two temporal points

use meos::{meos_initialize, TPoint};

meos_initialize("UTC");

let tpoint1: TGeomPoint = "[Point(0 0 0)@2001-01-01, Point(1 1 1)@2001-01-03, Point(0 0 0)@2001-01-05)".parse().unwrap();
let tpoint2: TGeomPoint = "[Point(2 0 0)@2001-01-02, Point(1 1 1)@2001-01-04, Point(2 2 2)@2001-01-06)".parse().unwrap();

let distance = tpoint1.nearest_approach_distance(tpoint2);
println!("{distance}"); // Prints 0.5

Check if a trajectory ever goes through a point (using geos)

use meos::{meos_initialize, TPoint};
use geos::{Geometry}

meos_initialize("UTC");

let trajectory: TGeomPoint = "[Point(0 0 0)@2001-01-01, Point(2 2 2)@2001-01-05)".parse().unwrap();
let geom = Geometry::new_from_wkt("Point (1 1 1)").expect("Invalid geometry");

println!("Does go through `geom`: {}", tpoint1.ever_equal_than_value(geom).unwrap()); // `true`

Multithreading

Right now it should only be used in single-threaded applications. In the foreseeable future this could change.

Build

This crate links dynamically to your system-installed meos. See sys/README.md for more information.

Contributing

Only a subset of meos has been implemented, feel free to add wrappers for missing features.

All added features needs to be tested and this being a C wrapper, valgrind runs on all examples/tests to check that no bugs / memory leaks are lurking.

Acknowledgments

This wrapper has been deeply influenced by the Rust wrapper of geos