• 一、geoJson数据
  • 1. 是什么
• 二. 具体类型数据结构
  • 1. 单节点
  • 2. 多节点

一、geoJson数据

1. 是什么

• json 是通过键值对表示数据对象的一种格式，geoJson 是 json 的子集，用 json 的语法表达和存储地理数据。
• geoJson 支持以下几何类型：
  • Point
  • LineString
  • Polygon
  • MultiPoint
  • MultiLineString
  • MultiPolygon

二. 具体类型数据结构

1. 单节点

• 点

  • 数据结构

    {
      "type": "FeatureCollection",
      "features": [
        {
          "type": "Feature",
          "properties": {},
          "geometry": {
            "type": "Point",
            "coordinates": [
              105.380859375,
              31.57853542647338
            ]
          }
        }
      ]
    }

  • 示意图

• 线

  • 数据结构

     {
        "type": "FeatureCollection",
        "features": [
          {
            "type": "Feature",
            "properties": {},
            "geometry": {
              "type": "LineString",
              "coordinates": [
                [
                  109.566650390625,
                  36.4477991295848
                ],
                [
                  108.0560302734375,
                  35.303918565311704
                ]
              ]
            }
          }
        ]
      }

  • 示意图

• 多边形

  • 数据结构

    {
      "type": "FeatureCollection",
      "features": [
        {
          "type": "Feature",
          "properties": {},
          "geometry": {
            "type": "Polygon",
            "coordinates": [
              [
                [
                  107.6220703125,
                  34.939985151560435
                ],
                [
                  110.2862548828125,
                  34.939985151560435
                ],
                [
                  110.2862548828125,
                  36.491973470593685
                ],
                [
                  107.6220703125,
                  36.491973470593685
                ],
                [
                  107.6220703125,
                  34.939985151560435
                ]
              ]
            ]
          }
        }
      ]
    }

  • 示意图
    

2. 多节点

• 多个点

  • 数据结构

    {
      "type": "FeatureCollection",
      "features": [
        {
          "type": "Feature",
          "properties": {},
          "geometry": {
            "type": "MultiPoint",
            "coordinates": [
              [
                81.705322265625,
                53.63161060657857
              ],
              [
                81.7822265625,
                54.7943516039205
              ]
            ]
          }
        }
      ]
    }

  • 示意图
    

• 多条线

  • 数据结构

    {
      "type": "FeatureCollection",
      "features": [
        {
          "type": "Feature",
          "properties": {},
          "geometry": {
            "type": "MultiLineString",
            "coordinates": [
                [[10.0, 10.0], [20.0, 20.0], [10.0, 40.0]], 
                [[40.0, 40.0], [30.0, 30.0], [40.0, 20.0], [30.0, 10.0]]
            ]
          }
        }
      ]
    }

  • 示意图

• 多个面

  • 数据结构

    {
      "type": "FeatureCollection",
      "features": [
        {
          "type": "Feature",
          "properties": {},
          "geometry": {
            "type": "MultiPolygon",
            "coordinates": [
                [
                    [
                      [30.0, 20.0], [45.0, 40.0],
                      [10.0, 40.0], [30.0, 20.0]
                    ]
                ], 
                [
                    [
                      [15.0, 5.0], [40.0, 10.0],
                      [10.0, 20.0], [5.0, 10.0], 
                      [15.0, 5.0]
                    ]
                ]
            ]
          }
        }
      ]
    }

  • 示意图