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adds multi trail support for maplibre

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This commit is contained in:
Christian Beutel
2024-11-29 18:36:33 +01:00
parent c91f2afcc5
commit 390a7b52ee
16 changed files with 621 additions and 221 deletions
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149
web/src/lib/util/geojson_util.ts
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@@ -30,42 +30,91 @@ export function bbox(
export function findStartAndEndPoints(geojson: GeoJsonObject): Position[] {
const startEndPoints: Position[] = [];
(geojson as FeatureCollection).features.forEach((feature) => {
const geometry = feature.geometry;
if (geometry.type === "LineString") {
const coords = geometry.coordinates as number[][];
const start: [number, number] = [coords[0][0], coords[0][1]]; // First point
const end: [number, number] = [
coords[coords.length - 1][0],
coords[coords.length - 1][1],
]; // Last point
startEndPoints.push(start);
startEndPoints.push(end)
} else if (geometry.type === "MultiLineString") {
const coords = geometry.coordinates as number[][][];
const start: [number, number] = [
coords[0][0][0],
coords[0][0][1],
]; // First point of the first line
const lastLine = coords[coords.length - 1];
const end: [number, number] = [
lastLine[lastLine.length - 1][0],
lastLine[lastLine.length - 1][1],
]; // Last point of the last line
startEndPoints.push(start);
startEndPoints.push(end)
} else {
console.warn(
`Geometry type ${geometry.type} is not supported for start/end point extraction.`
);
}
});
// Check if it's a FeatureCollection
if ((geojson as any).features) {
(geojson as any).features.forEach((feature: any) => {
const geometry = feature.geometry;
extractStartAndEndPointsFromGeometry(geometry, startEndPoints);
});
} else if ((geojson as any).geometry) {
// Single Feature
const geometry = (geojson as any).geometry;
extractStartAndEndPointsFromGeometry(geometry, startEndPoints);
} else {
console.warn(
"Unsupported GeoJSON type. Expected FeatureCollection or Feature."
);
}
return startEndPoints;
}
function extractStartAndEndPointsFromGeometry(geometry: any, startEndPoints: Position[]) {
if (geometry.type === "LineString") {
const coords = geometry.coordinates as number[][];
const start: [number, number] = [coords[0][0], coords[0][1]]; // First point
const end: [number, number] = [
coords[coords.length - 1][0],
coords[coords.length - 1][1],
]; // Last point
startEndPoints.push(start, end);
} else if (geometry.type === "MultiLineString") {
const coords = geometry.coordinates as number[][][];
const start: [number, number] = [
coords[0][0][0],
coords[0][0][1],
]; // First point of the first line
const lastLine = coords[coords.length - 1];
const end: [number, number] = [
lastLine[lastLine.length - 1][0],
lastLine[lastLine.length - 1][1],
]; // Last point of the last line
startEndPoints.push(start, end);
} else if (geometry.type === "Point") {
const coords = geometry.coordinates as number[];
startEndPoints.push(coords as [number, number], coords as [number, number]);
} else if (geometry.type === "MultiPoint") {
const coords = geometry.coordinates as number[][];
const start: [number, number] = [coords[0][0], coords[0][1]]; // First point
const end: [number, number] = [
coords[coords.length - 1][0],
coords[coords.length - 1][1],
]; // Last point
startEndPoints.push(start, end);
} else if (geometry.type === "Polygon") {
const coords = geometry.coordinates as number[][][];
const start: [number, number] = [
coords[0][0][0],
coords[0][0][1],
]; // First point of the first ring
const lastRing = coords[coords.length - 1];
const end: [number, number] = [
lastRing[lastRing.length - 1][0],
lastRing[lastRing.length - 1][1],
]; // Last point of the last ring
startEndPoints.push(start, end);
} else if (geometry.type === "MultiPolygon") {
const coords = geometry.coordinates as number[][][][];
const firstPolygon = coords[0];
const start: [number, number] = [
firstPolygon[0][0][0],
firstPolygon[0][0][1],
]; // First point of the first ring of the first polygon
const lastPolygon = coords[coords.length - 1];
const lastRing = lastPolygon[lastPolygon.length - 1];
const end: [number, number] = [
lastRing[lastRing.length - 1][0],
lastRing[lastRing.length - 1][1],
]; // Last point of the last ring of the last polygon
startEndPoints.push(start, end);
} else {
console.warn(
`Geometry type ${geometry.type} is not supported for start/end point extraction.`
);
}
}
function coordEach(geojson: GeoJSON, callback: (
currentCoord: number[],
coordIndex: number,
@@ -144,13 +193,13 @@ function coordEach(geojson: GeoJSON, callback: (
for (j = 0; j < coords.length; j++) {
if (
callback(
coords[j],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
coords[j],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
)
return false;
coordIndex++;
if (geomType === "MultiPoint") multiFeatureIndex++;
@@ -163,13 +212,13 @@ function coordEach(geojson: GeoJSON, callback: (
for (k = 0; k < coords[j].length - wrapShrink; k++) {
if (
callback(
coords[j][k],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
coords[j][k],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
)
return false;
coordIndex++;
}
@@ -185,13 +234,13 @@ function coordEach(geojson: GeoJSON, callback: (
for (l = 0; l < coords[j][k].length - wrapShrink; l++) {
if (
callback(
coords[j][k][l],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
coords[j][k][l],
coordIndex,
featureIndex,
multiFeatureIndex,
geometryIndex
) === false
)
)
return false;
coordIndex++;
}