Function geojson::de::deserialize_feature_collection

pub fn deserialize_feature_collection<'de, T>(
    feature_collection_reader: impl Read,
) -> Result<impl Iterator<Item = Result<T>>>
where
    T: Deserialize<'de>,

Deserialize a GeoJSON FeatureCollection into your custom structs.

Your struct must implement or derive serde::Deserialize.

You must use the deserialize_geometry helper if you are using geo_types or some other geometry representation other than geojson::Geometry.

Examples

use serde::Deserialize;
use geojson::de::deserialize_geometry;

#[derive(Deserialize)]
struct MyStruct {
    // You must use the `deserialize_geometry` helper if you are using geo_types or some other
    // geometry representation other than geojson::Geometry
    #[serde(deserialize_with = "deserialize_geometry")]
    geometry: geo_types::Point<f64>,
    name: String,
}

let feature_collection_str = r#"{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "geometry": { "type": "Point", "coordinates": [11.1, 22.2] },
            "properties": { "name": "Downtown" }
        },
        {
            "type": "Feature",
            "geometry": { "type": "Point", "coordinates": [33.3, 44.4] },
            "properties": { "name": "Uptown" }
        }
    ]
}"#;
let reader = feature_collection_str.as_bytes();

// enumerate over the features in the feature collection
for (idx, feature_result) in geojson::de::deserialize_feature_collection::<MyStruct>(reader).unwrap().enumerate() {
    let my_struct = feature_result.expect("valid geojson for MyStruct");
    if idx == 0 {
        assert_eq!(my_struct.name, "Downtown");
        assert_eq!(my_struct.geometry.x(), 11.1);
    } else if idx == 1 {
        assert_eq!(my_struct.name, "Uptown");
        assert_eq!(my_struct.geometry.x(), 33.3);
    } else {
        unreachable!("there are only two features in this collection");
    }
}