add custom layer manager

wangzhibo

2021-09-15 7bd57c68259f3e47cf4b396fefb1abb3d12a71f5

 config/config.json

@@ -41,7 +41,7 @@
      "vrButton": false,
      "fullscreenButton": true,
      "navigationHelpButton": false,
      "animation": true,
      "animation": false,
      "timeline": false,
      "infoBox": false,
      "geocoder": false,
@@ -55,7 +55,7 @@
        "fps": false,
        "crs": "CGCS2000_GK_Zone_3",
        "crsDecimal": 0,
        "template": "<div>经度:{lng}</div> <div>纬度:{lat}</div> <div>横{crsx}  纵{crsy}</div> <div>海拔：{alt}米</div> <div>层级：{level}</div><div>方向：{heading}°</div> <div>俯仰角：{pitch}°</div><div>视高：{cameraHeight}米</div>"
        "template": "<div>经度:{lng}</div> <div>纬度:{lat}</div> <div>海拔：{alt}米</div> <div>层级：{level}</div><div>方向：{heading}°</div> <div>俯仰角：{pitch}°</div><div>视高：{cameraHeight}米</div>"
      }
    },
    "terrain": {