Struct mvt::Tile

pub struct Tile { /* fields omitted */ }

A tile represents a rectangular region of a map. Each tile can contain any number of layers. When all layers have been added to the tile, it can be written out or converted to a Vec<u8>.

Example

      use mvt::Tile;
      let mut tile = Tile::new(4096);
      let layer = tile.create_layer("First Layer");
      // ...
      // set up the layer
      // ...
      tile.add_layer(layer)?;
      // ...
      // add more layers
      // ...
      let data = tile.to_bytes()?;

Methods

impl Tile

pub fn new(extent: u32) -> Self

Create a new tile.

• extent Size in screen coördinates.

pub fn extent(&self) -> u32

Get extent in screen coördinates.

pub fn num_layers(&self) -> usize

Get the number of layers.

pub fn create_layer(&self, name: &str) -> Layer

Create a new layer.

• name Layer name.

pub fn add_layer(&mut self, layer: Layer) -> Result<(), Error>

Add a layer.

• layer The layer.

Returns an error if:

• a layer with the same name already exists
• the layer extent does not match the tile extent

pub fn write_to(&self, out: &mut dyn Write) -> Result<(), Error>

Write the tile.

• out Writer to output the tile.

pub fn to_bytes(&self) -> Result<Vec<u8>, Error>

Encode the tile and return the bytes.

pub fn compute_size(&self) -> usize

Compute the encoded size in bytes.