Struct GeomEncoder

Source

pub struct GeomEncoder<F>where
    F: Float,
{ /* private fields */ }

Expand description

Encoder for Feature geometry.

This can consist of Point, Linestring or Polygon data.

§Example

let geom_data = GeomEncoder::new(GeomType::Point)
    .point(0.0, 0.0)?
    .point(10.0, 0.0)?
    .encode()?;

Implementations§

Source §

impl<F> GeomEncoder<F>
where F: Float,

Source

pub fn new(geom_tp: GeomType) -> Self

Create a new geometry encoder.

geom_tp Geometry type.

Examples found in repository ?

examples/simple.rs (line 7)

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}

Source

pub fn bbox(self, bbox: BBox<F>) -> Self

Add a bounding box

Source

pub fn transform(self, transform: Transform<F>) -> Self

Add a transform

Source

pub fn point(self, x: F, y: F) -> Result<Self, Error>

Add a point, taking ownership (for method chaining).

Examples found in repository ?

examples/simple.rs (line 8)

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}

Source

pub fn add_point(&mut self, x: F, y: F) -> Result<(), Error>

Add a point.

Source

pub fn complete_geom(&mut self) -> Result<(), Error>

Complete the current geometry (for multilinestring / multipolygon).

Source

pub fn complete(self) -> Result<Self, Error>

Complete the current geometry (for multilinestring / multipolygon).

Source

pub fn encode(self) -> Result<GeomData, Error>

Encode the geometry data, consuming the encoder.

Examples found in repository ?

examples/simple.rs (line 13)

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}