Struct Layer

Source

pub struct Layer { /* private fields */ }

Expand description

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§

Source §

impl Layer

Source

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

Get the layer name.

Source

pub fn num_features(&self) -> usize

Get number of features (count).

Source

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)

3fn main() -> Result<(), Error> {
4    let mut tile = Tile::new(4096);
5    let layer = tile.create_layer("First Layer");
6    // NOTE: normally, the Transform would come from MapGrid::tile_transform
7    let b = GeomEncoder::new(GeomType::Linestring)
8        .point(0.0, 0.0)?
9        .point(1024.0, 0.0)?
10        .point(1024.0, 2048.0)?
11        .point(2048.0, 2048.0)?
12        .point(2048.0, 4096.0)?
13        .encode()?;
14    let mut feature = layer.into_feature(b);
15    feature.set_id(1);
16    feature.add_tag_string("key", "value");
17    let layer = feature.into_layer();
18    tile.add_layer(layer)?;
19    let data = tile.to_bytes()?;
20    println!("encoded {} bytes: {:?}", data.len(), data);
21    Ok(())
22}