Leaflet 和 TurfJS：无法使用目的地和方位绘制垂直线

Question

我正在尝试绘制垂直线，并且我正在使用 destination 和 rhumbDestination 方法。

let home = turf.point([43.12831626497193, 1.259286403656006]);
L.circle(home.geometry.coordinates, {
    color: 'purple',
    fillColor: 'purple',
    fillOpacity: 0.5,
    radius: 20
}).addTo(map);

let destination;

destination = turf.rhumbDestination(home.geometry.coordinates, 400, 45, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'green', weight: 5}).addTo(map);
destination = turf.rhumbDestination(home.geometry.coordinates, 400, -135, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'green', weight: 5}).addTo(map);


destination = turf.rhumbDestination(home.geometry.coordinates, 400, 135, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'red', weight: 5}).addTo(map);
destination = turf.rhumbDestination(home.geometry.coordinates, 400, -45, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'red', weight: 5}).addTo(map);

但生成的线不垂直

Not perpendicular

我正在使用传单进行可视化。我也用destination方法测试过，结果一样。

虽然轴承是 90 的倍数，但结果是正确的。

destination = turf.rhumbDestination(home.geometry.coordinates, 400, 0, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'green', weight: 5}).addTo(map);
destination = turf.rhumbDestination(home.geometry.coordinates, 400, -180, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'green', weight: 5}).addTo(map);


destination = turf.rhumbDestination(home.geometry.coordinates, 400, 90, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'red', weight: 5}).addTo(map);
destination = turf.rhumbDestination(home.geometry.coordinates, 400, -90, {units: 'meters'});
L.polyline([destination.geometry.coordinates, home.geometry.coordinates]).setStyle({color: 'red', weight: 5}).addTo(map);

Perpendicular

我做错了什么？如何使用 leaflet 和 turfjs 绘制垂直线？

Answer 1

这是坐标顺序的问题：Leaflet（如 Google 地图）使用 [latitude, longitude] 模式，而 Turf 遵循 [longitude, latitude] 的 GeoJSON 定义，即等同于 [ x, y] 在几何平面上。

感谢stegobit的回答

Leaflet 和 TurfJS：无法使用目的地和方位绘制垂直线

Leaflet and TurfJS: Can not draw perpendicular lines using destination and bearing

bearing

leaflet

turfjs