CogMetadata

geocog::cog_reader

Struct CogMetadata 

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pub struct CogMetadata {
Show 19 fields
    pub width: usize,
    pub height: usize,
    pub tile_width: usize,
    pub tile_height: usize,
    pub bands: usize,
    pub data_type: CogDataType,
    pub compression: Compression,
    pub predictor: u16,
    pub little_endian: bool,
    pub tile_offsets: Vec<u64>,
    pub tile_byte_counts: Vec<u64>,
    pub tiles_across: usize,
    pub tiles_down: usize,
    pub is_tiled: bool,
    pub geo_transform: GeoTransform,
    pub crs_code: Option<i32>,
    pub stats_min: Option<f32>,
    pub stats_max: Option<f32>,
    pub nodata: Option<f64>,

}
Expand description

COG metadata - read from IFD without loading tile data

Fields§

§width: usize

Image dimensions

§height: usize§tile_width: usize

Tile dimensions (COG requirement)

§tile_height: usize§bands: usize

Number of bands/samples

§data_type: CogDataType

Data type

§compression: Compression

Compression method

§predictor: u16

Predictor (1=none, 2=horizontal differencing, 3=floating point)

§little_endian: bool

Byte order

§tile_offsets: Vec<u64>

Tile byte offsets in the file

§tile_byte_counts: Vec<u64>

Tile byte counts (compressed sizes)

§tiles_across: usize

Number of tiles across

§tiles_down: usize

Number of tiles down

§is_tiled: bool

Whether this is a tiled TIFF (true) or stripped TIFF (false) Tiled TIFFs are COG-optimized, stripped TIFFs are not

§geo_transform: GeoTransform

Geographic transform

§crs_code: Option<i32>

Detected CRS (EPSG code)

§stats_min: Option<f32>

Min/max values from GDAL statistics (if present)

§stats_max: Option<f32>§nodata: Option<f64>

NoData value

Implementations§

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impl CogMetadata

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pub fn is_tiled(&self) -> bool

Check if this appears to be a valid COG (has tiles)

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pub fn tile_index_for_pixel(&self, px: usize, py: usize) -> Option<usize>

Get tile index for a pixel coordinate

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pub fn pixel_range_in_tile( &self, tile_index: usize, ) -> (usize, usize, usize, usize)

Get pixel range within a tile

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pub fn tile_pixel_count(&self, tile_index: usize) -> usize

Get number of valid pixels in a tile (handles edge tiles)

Trait Implementations§

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impl Clone for CogMetadata

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fn clone(&self) -> CogMetadata

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for CogMetadata

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

Formats the value using the given formatter. Read more

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