[英]add feature to OpenLayers 6
我正在嘗試使用 OpenLayers 6 將幾何體 LineString 添加到 VectorLayers,但失敗了。 感謝你的幫助。
這是我的代碼
var coordinates = [
[new ol.geom.Point(103.8797182, 1.3160559)],
[new ol.geom.Point(103.8800485, 1.3161336)],
[new ol.geom.Point(103.8800889, 1.3161672)],
[new ol.geom.Point(103.8801166, 1.3162658)],
[new ol.geom.Point(103.8798829, 1.3171543)],
];
console.log(coordinates);
layer = new ol.layer.Vector({
source: new ol.source.Vector({
features: [
new ol.Feature({
geometry: new ol.geom.LineString(coordinates),
name: "Line",
}),
],
}),
style: function (feature) {
console.log(feature.getGeometry().getType());
return styles[feature.getGeometry().getType()];
},
});
powerMap.addLayer(layer);
由於圖層未顯示,代碼有什么問題嗎?
編輯:我已經實施了馬克的建議,這是解決方案:
var coordinates = [
[ 103.7960334725309, 1.4494121393815099 ],
[ 103.79617186914557, 1.4491070600247167 ],
[ 103.79642909728881, 1.4489874603770377 ],
[ 103.79664709373664, 1.4489591347536637 ],
[ 103.79904789809408, 1.4501025693183976 ],
[ 103.79917449669307, 1.449834325824822 ]
];
var lines = new ol.geom.LineString(coordinates).transform('EPSG:4326', powerMap.getView().getProjection());
var layer = new ol.layer.Vector({
source: new ol.source.Vector({
features: [
new ol.Feature({
geometry: lines,
name: "Line",
}),
],
}),
style: function (feature) {
console.log(feature.getGeometry().getType());
return styles[feature.getGeometry().getType()];
},
});
powerMap.addLayer(layer);
坐標應該是坐標數組,而不是點幾何數組
var coordinates = [
[103.8797182, 1.3160559],
[103.8800485, 1.3161336],
[103.8800889, 1.3161672],
[103.8801166, 1.3162658],
[103.8798829, 1.3171543],
];
您可能還需要將 LineString 轉換為 map 投影
new ol.geom.LineString(coordinates).transform('EPSG:4326', map.getView().getProjection())
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