Struct backend::controller::plant_layer::heatmap
source · pub struct heatmap;
Expand description
Endpoint for generating a heatmap signaling ideal locations for planting the plant.
Red pixels signal areas where the plant shouldn’t be planted, while green areas signal ideal locations. The more transparent the location is the less data there is to support the claimed preference.
The resulting heatmap does represent actual coordinates, meaning the pixel at (0,0) is not necessarily at coordinates (0,0). Instead the image has to be moved and scaled to fit inside the maps boundaries. This means the lower left corner of the heatmap has to be moved/scaled to the (x_min,y_min) coordinate, while the upper right corner has to be moved/scaled to (x_max,y_max).
Here is pseudocode for how to move the map to the correct place in the frontend:
// 1. Extract the polygon object from the map:
let polygon = map.geometry;
// 2. Calculate the min and max coordinates for the map:
let x_min = Math.min(...polygon.rings[0].map(point => point.x));
let y_min = Math.min(...polygon.rings[0].map(point => point.y));
let x_max = Math.max(...polygon.rings[0].map(point => point.x));
let y_max = Math.max(...polygon.rings[0].map(point => point.y));
// 3. Calculate the map's width and height:
let map_width = x_max - x_min;
let map_height = y_max - y_min;
// 4. Fetch the heatmap image from the server and draw it on the canvas.
let heatmapResponse = await fetch('/path/to/your/heatmap/endpoint');
let heatmapBlob = await heatmapResponse.blob();
// From https://konvajs.org/docs/shapes/Image.html.
var imageObj = new Image();
imageObj.onload = function () {
var heatmap = new Konva.Image({
x: x_min,
y: y_min,
image: imageObj,
width: map_width,
height: map_height,
});
// add the shape to the layer
layer.add(heatmap);
};
imageObj.src = URL.createObjectURL(heatmapBlob);
Errors
- If the connection to the database could not be established.
Trait Implementations§
source§impl HttpServiceFactory for heatmap
impl HttpServiceFactory for heatmap
fn register(self, __config: &mut AppService)
Auto Trait Implementations§
impl RefUnwindSafe for heatmap
impl Send for heatmap
impl Sync for heatmap
impl Unpin for heatmap
impl UnwindSafe for heatmap
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source§fn load<'query, U, 'conn>(
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U: Send + 'conn,
Conn: AsyncConnection,
Self: LoadQuery<'query, Conn, U> + 'query,
fn get_result<'query, 'conn, U>( self, conn: &'conn mut Conn ) -> AndThen<Self::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<Self::Stream<'conn>, Global>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>, Global>>)) -> Result<U, Error>>, fn(_: Self::Stream<'conn>) -> Map<StreamFuture<Pin<Box<Self::Stream<'conn>, Global>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>, Global>>)) -> Result<U, Error>>>where U: Send + 'conn, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,
Runs the command, and returns the affected row. Read more
source§fn get_results<'query, U, 'conn>(
self,
conn: &'conn mut Conn
) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U, Global>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U, Global>>>where
U: Send,
Conn: AsyncConnection,
Self: LoadQuery<'query, Conn, U> + 'query,
fn get_results<'query, U, 'conn>( self, conn: &'conn mut Conn ) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U, Global>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U, Global>>>where U: Send, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,
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Vec
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self,
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) -> AndThen<<Self::Output as LoadQuery<'query, Conn, U>>::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>)) -> Result<U, Error>>, fn(_: <Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>) -> Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>)) -> Result<U, Error>>>where
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fn first<'query, 'conn, U>( self, conn: &'conn mut Conn ) -> AndThen<<Self::Output as LoadQuery<'query, Conn, U>>::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>)) -> Result<U, Error>>, fn(_: <Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>) -> Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>, Global>>)) -> Result<U, Error>>>where U: Send + 'conn, Conn: AsyncConnection, Self: LimitDsl, Self::Output: LoadQuery<'query, Conn, U> + Send + 'query,
Attempts to load a single record. Read more