Struct Dem 

pub struct Dem {
    pub heights: Vec<f64>,
    pub rows: usize,
    pub cols: usize,
    pub cell_size: f64,
    pub nodata: f64,
}

A regular-grid Digital Elevation Model.

Heights are stored in row-major order: index = row * cols + col. The origin is at the north-west corner; rows increase southward (y+), columns increase eastward (x+).

Fields

heights: Vec<f64>

Elevation values (metres), row-major.

rows: usize

Number of rows.

cols: usize

Number of columns.

cell_size: f64

Cell size in metres (square cells assumed).

nodata: f64

No-data sentinel value.

Implementations

impl Dem

pub fn new(heights: Vec<f64>, rows: usize, cols: usize, cell_size: f64) -> Self

Construct a new DEM.

Panics

Panics if heights.len() != rows * cols.

pub fn get(&self, row: usize, col: usize) -> Option<f64>

Return the elevation at (row, col), or None if out of bounds.

pub fn get_clamped(&self, row: i64, col: i64) -> f64

Return the elevation at (row, col) clamped to grid boundaries.

pub fn is_valid(&self, row: usize, col: usize) -> bool

Return true if the cell contains valid data.

pub fn window_3x3(&self, row: usize, col: usize) -> [[f64; 3]; 3]

Return a 3×3 neighbourhood window centred at (row, col).

Missing edge cells are filled by replication of the nearest valid cell.

Trait Implementations

impl Clone for Dem

fn clone(&self) -> Dem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Dem

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

Formats the value using the given formatter.