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.

```rust,no_run // 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::frompath("planet.osm.pbf").unwrap(); let filecache = DenseFileCache::new(PathBuf::from("node.cache")).unwrap();

reader.parbridge().foreachwith( filecache, |fc, blob| { let mut cache = fc.getaccessor(); if let BlobDecode::OsmData(block) = blob.unwrap().decode().unwrap() { for node in block.groups().flatmap(|g| g.densenodes()) { cache.setlat_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 with cargo 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, including cargo fmt, cargo clippy, and cargo test. Use git 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.