Struct WKTWriter

Source

pub struct WKTWriter { /* private fields */ }

Expand description

The WKTWriter type is used to generate WKT formatted output from Geometry.

§Example

use geos::{Geometry, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");

Implementations§

Source §

impl WKTWriter

Source

pub fn new() -> GResult<WKTWriter>

Creates a new WKTWriter instance.

§Example

use geos::{Geometry, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");

Source

pub fn write<G: Geom>(&mut self, geometry: &G) -> GResult<String>

Writes out the given geometry as WKT format.

§Example

use geos::{Geometry, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");

Source

pub fn set_rounding_precision(&mut self, precision: u32)

Sets the precision to be used when calling WKTWriter::write. Often, what users actually want is the WKTWriter::set_trim method instead.

§Example

use geos::{Geometry, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

writer.set_rounding_precision(2);
assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.50 2.50)");

writer.set_rounding_precision(4);
assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000 2.5000)");

Source

pub fn set_output_dimension(&mut self, dimension: OutputDimension)

Sets the number of dimensions to be used when calling WKTWriter::write. By default, it is 2.

§Example

use geos::{Geometry, OutputDimension, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (1.1 2.2 3.3)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");
writer.set_trim(true);

assert_eq!(writer.write(&point_geom).unwrap(), "POINT (1.1 2.2)");

writer.set_output_dimension(OutputDimension::ThreeD);
assert_eq!(writer.write(&point_geom).unwrap(), "POINT Z (1.1 2.2 3.3)");

Source

pub fn get_out_dimension(&self) -> GResult<OutputDimension>

Returns the number of dimensions to be used when calling WKTWriter::write. By default, it is 2.

§Example

use geos::{OutputDimension, WKTWriter};

let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

assert_eq!(writer.get_out_dimension(), Ok(OutputDimension::TwoD));
writer.set_output_dimension(OutputDimension::ThreeD);
assert_eq!(writer.get_out_dimension(), Ok(OutputDimension::ThreeD));

Source

pub fn set_trim(&mut self, trim: bool)

Enables/disables trimming of unnecessary decimals.

§Example

use geos::{Geometry, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5000000000000000 2.5000000000000000)");

writer.set_trim(true);
assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5 2.5)");

Source

pub fn set_old_3D(&mut self, use_old_3D: bool)

Enables/disables old 3D/4D WKT style generation.

§Example

use geos::{Geometry, OutputDimension, WKTWriter};

let point_geom = Geometry::new_from_wkt("POINT (2.5 2.5 2.5)").expect("Invalid geometry");
let mut writer = WKTWriter::new().expect("Failed to create WKTWriter");

writer.set_output_dimension(OutputDimension::ThreeD);
writer.set_trim(true);

assert_eq!(writer.write(&point_geom).unwrap(), "POINT Z (2.5 2.5 2.5)");

writer.set_old_3D(true);
assert_eq!(writer.write(&point_geom).unwrap(), "POINT (2.5 2.5 2.5)");