Crate geoserde_fgb 

Geoserde FGB

geoserde-fgb provides a serde-based API for reading and writing the FlatGeobuf format.

Write

Write geometries and your own serde structs as features. The geometry can be any geo-traits type, such as geo-types.

use std::fs::File;
use std::io::BufWriter;

use serde::Serialize;

#[derive(Serialize)]
struct City {
    name: String,
    population: i64,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut ser = geoserde_fgb::LayerSerializer::new()?;
    let prop = City { name: "Tokyo".into(), population: 14_000_000 };
    let geom = geo_types::Point::new(139.7, 35.7);
    ser.serialize_feature(&geom, &prop)?;
    ser.write(BufWriter::new(File::create("cities.fgb")?))?;
    Ok(())
}

Read

Read features into geo-types geometries and your own serde structs.

use std::fs::File;
use std::io::BufReader;

use serde::Deserialize;

#[derive(Deserialize)]
struct City {
    name: String,
    population: i64,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let file = BufReader::new(File::open("cities.fgb")?);
    let mut de = geoserde_fgb::LayerDeserializer::new(file)?;
    // Pass the geometry type and the properties type to read into
    for feature in de.features::<geo_types::Point, City>() {
        let (geom, prop) = feature?;
        println!("{} {} {:?}", prop.name, prop.population, geom);
    }
    Ok(())
}

Cargo features

• geo-types — Supports geo-types geometries. Enabled by default.

Re-exports

pub use de::LayerDeserializer;

pub use ser::LayerSerializer;

pub use flatgeobuf;

Modules

de

Reading features from FlatGeobuf.

ser

Writing features to FlatGeobuf.