osm-is-area

An OpenSreetMap area must be a way or a relation. But not just any way or relation.

If you are not so fortunate that all your elements are nodes, look further...

API

osm_is_area::way

According to Overpass turbo, a way is considered an area if

1. It forms a closed loop
2. It is not tagged area=no
3. It conforms to one of the conditions for polygon tags.

use osm_is_area;

let tags = vec![
 (r"waterway", r"riverbank")
];
let refs = vec![1, 3, 2, 1];

let is_area = osm_is_area::way(&tags, &refs);
assert_eq!(true, is_area);

osm_is_area::relation

A relation is an area when it has a tag "type" with value "multipolygon".

use osm_is_area;

let tags = vec![
 (r"type", r"multipolygon")
];
let members = vec![1, 3, 2, 1];

let is_area = osm_is_area::relation(&tags, &members);
assert_eq!(true, is_area);

License

MIT

lib.rs:

Returns true if the given way is an area according to Overpass turbo

Examples

use osm_is_area;

let tags = vec![
 (r"waterway", r"riverbank")
];
let refs = vec![1, 3, 2, 1];

let is_area = osm_is_area::way(&tags, &refs);
assert_eq!(true, is_area);

A relation is an area when it has a tag "type" with value "multipolygon".

use osm_is_area;

let tags = vec![
    (r"type", r"multipolygon")
];
let members = vec![1, 3, 2, 1];

let is_area = osm_is_area::relation(&tags, &members);
assert_eq!(true, is_area);