Struct Grid

pub struct Grid {
    pub extent: Extent,
    pub srid: i32,
    pub units: Unit,
    pub origin: Origin,
    /* private fields */
}

Tile grid

Fields

extent: Extent

The geographical extent covered by the grid, in ground units (e.g. meters, degrees, feet, etc.). Must be specified as 4 floating point numbers ordered as minx, miny, maxx, maxy. The (minx,miny) point defines the origin of the grid, i.e. the pixel at the bottom left of the bottom-left most tile is always placed on the (minx,miny) geographical point. The (maxx,maxy) point is used to determine how many tiles there are for each zoom level.

srid: i32

Spatial reference system (PostGIS SRID).

units: Unit

Grid units

origin: Origin

Grid origin

Implementations

impl Grid

pub fn wgs84() -> Grid

WGS84 grid

pub fn web_mercator() -> Grid

Web Mercator grid (Google maps compatible)

pub fn new( width: u16, height: u16, extent: Extent, srid: i32, units: Unit, resolutions: Vec<f64>, origin: Origin, ) -> Grid

pub fn nlevels(&self) -> u8

pub fn maxzoom(&self) -> u8

pub fn pixel_width(&self, zoom: u8) -> f64

Pixel width for 256x256 tile

pub fn scale_denominator(&self, zoom: u8) -> f64

Scale denominator based on standardized pixel size (https://www.ogc.org/standards/se)

pub fn tile_extent(&self, xtile: u32, ytile: u32, zoom: u8) -> Extent

Extent of a given tile in the grid given its x, y, and z in TMS adressing scheme

pub fn ytile_from_xyz(&self, ytile: u32, zoom: u8) -> u32

reverse y tile for XYZ adressing scheme

pub fn tile_extent_xyz(&self, xtile: u32, ytile: u32, zoom: u8) -> Extent

Extent of a given tile in XYZ adressing scheme

pub fn tile_limits(&self, extent: Extent, tolerance: i32) -> Vec<ExtentInt>

Tile index limits covering extent

Trait Implementations

impl Clone for Grid

fn clone(&self) -> Grid

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Grid

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.