osm-node-cache

Flat file node cache stores lat,lon coordinate pairs as u64 values with their index being the position in the file. In other words - 0th u64 value is stored as the first 8 bytes, etc.

The library allows multithreaded access to the cache, and can dynamically grow the cache file.

// Libraries:  osmpbf, rayon
fn main() {
    let reader = BlobReader::from_path("planet.osm.pbf").unwrap();
    let file_cache = DenseFileCache::new(PathBuf::from("node.cache"))?;

    reader.par_bridge().for_each_with(
        file_cache,
        |fc, blob| {
            let mut cache = fc.get_accessor();
            if let BlobDecode::OsmData(block) = blob.unwrap().decode().unwrap() {
                for node in block.groups().flat_map(|g| g.dense_nodes()) {
                    cache.set_lat_lon(node.id as usize, node.lat(), node.lon());
                }
            };
        });
}

License

You may use this library under MIT or Apache 2.0 license