https://github.com/pka/georaster

Rust library for accessing geospatial raster images
https://github.com/pka/georaster

Last synced: 7 days ago
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Rust library for accessing geospatial raster images

• Host: GitHub
• URL: https://github.com/pka/georaster
• Owner: pka
• License: apache-2.0
• Created: 2022-10-29T17:38:43.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2024-08-29T06:09:44.000Z (2 months ago)
• Last Synced: 2024-10-20T06:15:26.159Z (19 days ago)
• Language: Rust
• Size: 15.9 MB
• Stars: 24
• Watchers: 2
• Forks: 7
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE-APACHE

Awesome Lists containing this project

• awesome-georust - georaster - Rust library for accessing geospatial raster images (GeoTIFF). (Watchlist)

README

        
# georaster

[![crates.io version](https://img.shields.io/crates/v/georaster.svg)](https://crates.io/crates/georaster)

[![docs.rs docs](https://docs.rs/georaster/badge.svg)](https://docs.rs/georaster)

Rust library for accessing geospatial raster images.

## Usage examples

Read pixel value from GeoTIFF:

```rust

let img_file = BufReader::new(File::open("N265E425.tif").unwrap());

let mut tiff = GeoTiffReader::open(img_file).unwrap();

match tiff.read_pixel(x, y) {

    RasterValue::U16(v) => println!("Height: {v}"),

    _ => println!("Unexpected pixel type"),

};

```

Extract part of GeoTIFF into a PNG:

```rust

let img_file = BufReader::new(File::open("N265E425.tif").unwrap());

let mut tiff = GeoTiffReader::open(img_file).unwrap();

let (x0, y0, w, h) = (2500, 3000, 100, 100);

let mut img = ImageBuffer::new(w, h);

for (x, y, pixel) in tiff.pixels(x0, y0, w, h) {

    if let RasterValue::U16(v) = pixel {

        img.put_pixel(x - x0, y - y0, image::Luma([v]));

    }

}

img.save("dtm.png").unwrap();

```

## Running the examples

Download test data:

```

cd data

make

```

```

cargo run --example info data/tiff/N265E425.tif

cargo run --example pixel data/tiff/N265E425.tif 2550 3050

cargo run --example crop data/tiff/N265E425.tif 100x100+2500+3000 dtm.png

cargo run --example img2ascii data/tiff/sat.tif

cargo run --example http_dtm

```