Struct ChartStore 

pub struct ChartStore { /* private fields */ }

A chart, open for reading.

Opened read-only and kept that way. This crate performs no writes; routes and tracks are stored in a separate writable database.

Implementations

impl ChartStore

pub fn open(path: &Path) -> Result<Self, StoreError>

Opens a chart GeoPackage.

Errors

If the file cannot be opened, or is not a GeoPackage.

pub fn path(&self) -> &Path

The path this chart was opened from. ChartStore does not expose its connection, so a caller deriving a related path (a cache file, a log entry) has no other way to obtain it.

pub fn object_classes(&self) -> Vec<String>

The object classes this chart carries, upper case and sorted.

pub fn features_in( &self, class: &str, bounds: Rect<f64>, ) -> Result<Vec<Feature>, StoreError>

Every feature of one class whose bounding box meets bounds.

A bounding-box result, not an exact one: the R-Tree narrows candidates, and the caller performs the precise geometry test. The index stays plain SQL and the geometry test stays in Rust, so reading the chart file requires no SQLite extension.

Errors

If the class is not in this chart, or a row cannot be read.

Trait Implementations

impl Debug for ChartStore

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.