Struct DemSource 

pub struct DemSource {
    pub url: String,
    pub encoding: DemEncoding,
    pub on_missing: OnMissing,
    pub attribution: Option<String>,
    pub tile_size: u32,
    pub max_zoom: Option<u8>,
    pub neighbor_fetch: bool,
    pub elevation_offset: f32,
}

Raster-DEM source. Tiles encode elevation in the RGB channels using either the Mapzen / Terrarium scheme (h = (R*256 + G + B/256) - 32768) or the Mapbox / MapLibre Terrain-RGB scheme (h = -10000 + (R*65536 + G*256 + B) * 0.1).

Fields

url: String

XYZ URL template with {z}, {x}, {y} placeholders, or a TileJSON document URL (anything ending in .json). PNG and WebP tiles are both supported (sniffed from content).

encoding: DemEncoding

on_missing: OnMissing

What a 404 within the zoom range means — empty (zero elevation), upsample from a parent, or fail the render.

attribution: Option<String>

Explicit attribution. When absent and url is a TileJSON, hosts inherit its attribution field.

tile_size: u32

max_zoom: Option<u8>

Highest zoom available from the source. Requests above this zoom overzoom from an ancestor tile.

neighbor_fetch: bool

If true, fetch the 8 neighbouring tiles in addition to the centre tile and stitch them so gradient-based ops (e.g. hillshade) have seam-free samples in the pad region.

elevation_offset: f32

Value subtracted from each decoded sample (metres). Useful for rebasing geoid-relative datasets.

Trait Implementations

impl Clone for DemSource

fn clone(&self) -> DemSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DemSource

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DemSource

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.