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Add OSM topography

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This commit is contained in:
Fuhrmann 2025-03-11 11:56:33 +01:00
parent c20b682d33
commit c414b9d2d6
10 changed files with 96 additions and 18 deletions
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13
app/three/utils/utils.ts
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@ -1,6 +1,7 @@
import { Vector3 } from "three";
import { Extent } from "./build-scene";
import { unpackEdges, unpackVertices } from "./parsers";
import { unpackEdges, unpackVertices } from "./decoders";
import proj4 from "proj4";
export function getMaxSize(extent: Extent) {
return Math.max(
@ -54,3 +55,13 @@ export async function fetchVertices(pointUrl: string, geomId: string) {
const buffer = await request(url);
return unpackVertices(buffer);
}
// Transformation from EPSG 3034 to EPSG 3857
const SOURCE = "EPSG:3034";
const PROJ_STRING =
"+proj=lcc +lat_0=52 +lon_0=10 +lat_1=35 +lat_2=65 +x_0=4000000 +y_0=2800000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs";
const DEST = "EPSG:3857";
proj4.defs(SOURCE, PROJ_STRING);
export function transform(p: number[]) {
return proj4(SOURCE, DEST, p);
}