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Add possibility to load external data as mercator tiles, add bbox tile possibilities, add CRAB and GRB as datasources in the GRB theme

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Pieter Vander Vennet 2021-10-27 03:52:19 +02:00
parent e777776531
commit d5f4572e9a
12 changed files with 254 additions and 61 deletions
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30
Logic/GeoOperations.ts
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@ -226,7 +226,7 @@ export class GeoOperations {
/**
* Generates the closest point on a way from a given point
*
*
* The properties object will contain three values:
// - `index`: closest point was found on nth line part,
// - `dist`: distance between pt and the closest point (in kilometer),
@ -283,6 +283,34 @@ export class GeoOperations {
return headerValuesOrdered.map(v => JSON.stringify(v)).join(",") + "\n" + lines.join("\n")
}
private static readonly _earthRadius = 6378137;
private static readonly _originShift = 2 * Math.PI * GeoOperations._earthRadius / 2;
//Converts given lat/lon in WGS84 Datum to XY in Spherical Mercator EPSG:900913
public static ConvertWgs84To900913(lonLat: [number, number]): [number, number] {
const lon = lonLat[0];
const lat = lonLat[1];
const x = lon * GeoOperations._originShift / 180;
let y = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
y = y * GeoOperations._originShift / 180;
return [x, y];
}
//Converts XY point from (Spherical) Web Mercator EPSG:3785 (unofficially EPSG:900913) to lat/lon in WGS84 Datum
public static Convert900913ToWgs84(lonLat: [number, number]): [number, number] {
const lon = lonLat[0]
const lat = lonLat[1]
const x = 180 * lon / GeoOperations._originShift;
let y = 180 * lat / GeoOperations._originShift;
y = 180 / Math.PI * (2 * Math.atan(Math.exp(y * Math.PI / 180)) - Math.PI / 2);
return [x, y];
}
public static GeoJsonToWGS84(geojson){
return turf.toWgs84(geojson)
}
/**
* Calculates the intersection between two features.
* Returns the length if intersecting a linestring and a (multi)polygon (in meters), returns a surface area (in m²) if intersecting two (multi)polygons