Crate osmnodecache
source ·Expand description
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.
// This example uses osmpbf crate
use std::path::PathBuf;
use rayon::iter::{ParallelBridge, ParallelIterator};
use osmnodecache::{DenseFileCache, CacheStore as _};
use osmpbf::{BlobReader, BlobDecode};
fn main() {
let reader = BlobReader::from_path("planet.osm.pbf").unwrap();
let file_cache = DenseFileCache::new(PathBuf::from("node.cache")).unwrap();
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());
}
};
});
}
Development
- This project is easier to develop with just, a modern alternative to
make
. Install it withcargo install just
. - To get a list of available commands, run
just
. - To run tests, use
just test
. - On
git push
, it will run a few validations, includingcargo fmt
,cargo clippy
, andcargo test
. Usegit push --no-verify
to skip these checks.
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
Structs
Enums
- Values supported by
Mmap::advise
andMmapMut::advise
functions.