commit 817fb10cd7eb529753f2912b9bb1c47225191e63
Author: Frank Villaro-Dixon <frank@villaro-dixon.eu>
Date:   Thu Apr 11 14:09:39 2024 +0200

    test
    
    Signed-off-by: Frank Villaro-Dixon <frank@villaro-dixon.eu>

diff --git a/.gitignore b/.gitignore
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..e9bf720
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "api-server"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+gdal = { version = "0.16.0", features = ["bindgen"] }
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..9a97e70
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,63 @@
+use std::fmt::Error;
+
+use gdal::errors::GdalError;
+use gdal::Dataset;
+use gdal;
+
+
+
+
+fn get_filename_from_latlon(lat: f64, lon: f64) -> String {
+        // Calculate the rounded values for latitude and longitude
+    let rounded_lat = lat.floor();
+    let rounded_lon = lon.floor();
+
+    // Convert the rounded values to strings with leading zeros if necessary
+    let lat_deg = format!("{:02}", rounded_lat.abs());
+    let lon_deg = format!("{:03}", rounded_lon.abs());
+
+    // Determine the hemisphere prefixes for latitude and longitude
+    let lat_prefix = if rounded_lat >= 0.0 { "N" } else { "S" };
+    let lon_prefix = if rounded_lon >= 0.0 { "E" } else { "W" };
+
+    // Construct the filename
+    let filename = format!(
+        "Copernicus_DSM_30_{}{}_00_{}{}_00_DEM.tif",
+        lat_prefix, lat_deg, lon_prefix, lon_deg
+    );
+
+    filename
+
+}
+
+fn geo_to_pixel(dataset: &Dataset, lat: f64, lon: f64) -> Result<(isize, isize), GdalError> {
+    let transform = dataset.geo_transform()?;
+    let x_pixel = ((lon - transform[0]) / transform[1]).round() as isize;
+    let y_pixel = ((lat - transform[3]) / transform[5]).round() as isize;
+    Ok((x_pixel, y_pixel))
+}
+
+fn elevation_from_coordinates(lat: f64, lon: f64) -> f64 {
+    let file = get_filename_from_latlon(lat, lon);
+    let full_filename = format!("data/{file}");
+
+    println!("file for {lat} {lon} is {full_filename}");
+
+    let ds = Dataset::open(full_filename).unwrap();
+    println!("This {} is in '{}' and has {} bands.", ds.driver().long_name(), ds.spatial_ref().unwrap().name().unwrap(), ds.raster_count());
+    println!("PRojection: {}", ds.projection());
+
+
+    let (px, py) = geo_to_pixel(&ds, lat, lon).unwrap();
+
+    let raster_band = ds.rasterband(1).unwrap();
+    let raster_value = raster_band.read_as::<f64>((px, py), (1, 1), (1, 1), None).unwrap();
+    raster_value.data[0]
+}
+
+fn main() {
+    let lat = 46.6;
+    let lon = 6.;
+    println!("ELE {lat} {lon}: {}", elevation_from_coordinates(lat, lon))
+
+}