Struct mvt::Layer

pub struct Layer { /* private fields */ }

A layer is a set of related features in a tile.

Example

use mvt::Tile;

let mut tile = Tile::new(4096);
let layer = tile.create_layer("First Layer");
// ...
// set up the layer
// ...

Implementations

impl Layer

pub fn name(&self) -> Option<&str>

Get the layer name.

pub fn num_features(&self) -> usize

Get number of features (count).

pub fn into_feature(self, geom_data: GeomData) -> Feature

Create a new feature, giving it ownership of the layer.

• geom_data Geometry data (consumed by this method).

Examples found in repository

examples/simple.rs (line 14)

fn main() -> Result<(), Error> {
    let mut tile = Tile::new(4096);
    let layer = tile.create_layer("First Layer");
    // NOTE: normally, the Transform would come from MapGrid::tile_transform
    let b = GeomEncoder::new(GeomType::Linestring)
        .point(0.0, 0.0)?
        .point(1024.0, 0.0)?
        .point(1024.0, 2048.0)?
        .point(2048.0, 2048.0)?
        .point(2048.0, 4096.0)?
        .encode()?;
    let mut feature = layer.into_feature(b);
    feature.set_id(1);
    feature.add_tag_string("key", "value");
    let layer = feature.into_layer();
    tile.add_layer(layer)?;
    let data = tile.to_bytes()?;
    println!("encoded {} bytes: {:?}", data.len(), data);
    Ok(())
}

Trait Implementations

impl Default for Layer

fn default() -> Self

Returns the “default value” for a type.