# 相关示例
# 增加Marker至地图
在地图sys_hello中，把此地图中一个CAD坐标为[725.32,18969.19]的点加进地图中
let marker = new vjmap.Marker();
let lngLat = map.toLngLat([725.32,18969.19]);
marker.setLngLat(lngLat);
marker.addToMap()
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# 获取Marker的CAD坐标
// 获取Marker的渲染经纬度坐标
let lngLat = marker.getLngLat();
// 把渲染经纬度坐标坐标转成CAD几何坐标
let pt = map.fromLngLat(lngLat)
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# 根据CAD坐标序列创建多边形
已知几组CAD的GeoJSON坐标序列和属性值，创建多边形增加至地图中。通过调用 map.toLngLat(data) 把CAD的GeoJSON几何坐标转渲染经纬度
let data = {
"type": "FeatureCollection",
"features": [
{
"id": "1",
"type": "Feature",
"properties": {
"name": "polygon1",
"color": "#00ffff"
},
"geometry": {
"coordinates": [
[
[
3006.0952985307595,
15198.972934052355
],
[
12606.64046359223,
9285.59366571666
],
[
4745.324495099878,
3720.060236694666
],
[
3006.0952985307595,
15198.972934052355
]
]
],
"type": "Polygon"
}
},
{
"id": "2",
"type": "Feature",
"properties": {
"name": "polygon2",
"color": "#ff00ff"
},
"geometry": {
"coordinates": [
[
[
19841.833921319492,
13807.589576796912
],
[
19841.833921319492,
4207.0444117340885
],
[
26172.62819683108,
4207.0444117340885
],
[
26172.62819683108,
13807.589576796912
],
[
19841.833921319492,
13807.589576796912
]
]
],
"type": "Polygon"
}
}
]
}
let polygon = new vjmap.Polygon({
data: map.toLngLat(data), // CAD几何坐标转渲染经纬度
fillColor: ['case', ['to-boolean', ['feature-state', 'hover']], 'red', ['get', 'color']],
fillOpacity: 0.8,
fillOutlineColor: "#f00",
isHoverPointer: true,
isHoverFeatureState: true
});
polygon.addTo(map);
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# 获取绘制图层的CAD坐标
通过调用 map.fromLngLat 把绘制图层的GeoJson转为CAD几何坐标
// 获取获取绘图对象的渲染经纬度
let lngLatJson = draw.getAll();
// 渲染经纬度转成CAD几何坐标
let cadJson = map.fromLngLat(lngLatJson);
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