Leaflet获取某一范围内的矢量数据，并显示在地图上

http://xx:6080/arcgis/rest/services/jiangyin/jiangyin/FeatureServer/0/query?where=1%3D1&objectIds=&time=&geometry=120.308%2C31.923%2C120.326%2C31.935&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&outFields=*&returnGeometry=true&maxAllowableOffset=&geometryPrecision=&outSR=&gdbVersion=&returnDistinctValues=false&returnIdsOnly=false&returnCountOnly=false&orderByFields=&groupByFieldsForStatistics=&outStatistics=&returnZ=false&returnM=false&f=json

>>https://www.cnblogs.com/2008nmj/p/14053361.html

Using GeoJSON with Leaflet:https://leafletjs.com/examples/geojson/

GeoJSON is becoming a very popular data format among many GIS technologies and services — it's simple, lightweight, straightforward, and Leaflet is quite good at handling it. In this example, you'll learn how to create and interact with map vectors created from GeoJSON objects.

什么是GeoJSON？

GeoJSON is a format for encoding a variety of geographic data structures […]. A GeoJSON object may represent a region of space (a Geometry), a spatially bounded entity (a Feature), or a list of Features (a FeatureCollection). GeoJSON supports the following geometry types: Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection. Features in GeoJSON contain a Geometry object and additional properties, and a FeatureCollection contains a list of Features.

GeoJSON是一种编码各种地理数据结构的格式[…]。GeoJSON对象可以表示一个空间区域（一个几何体）、一个空间边界实体（一个特性），或者一个特性列表（一个FeatureCollection）。GeoJSON支持以下几何体类型：点、线串、多边形、多点、多线串、多多边形和几何体集合。GeoJSON中的特性包含一个Geometry对象和其他属性，FeatureCollection包含一个特性列表。

Leaflet supports all of the GeoJSON types above, but Features and FeatureCollections work best as they allow you to describe features with a set of properties. We can even use these properties to style our Leaflet vectors. Here's an example of a simple GeoJSON feature:

Leaflet支持所有的上述GeoJSON类型，但是Features和FeatureCollections工作最好，因为它们允许你使用一套属性来描述特征。我们可以使用这些属性来给我们的Leaflet矢量赋予格式。这里是一个简单的GeoJSON特征的例子：

var geojsonFeature = {
    "type": "Feature",
    "properties": {
        "name": "Coors Field",
        "amenity": "Baseball Stadium",
        "popupContent": "This is where the Rockies play!"
    },
    "geometry": {
        "type": "Point",
        "coordinates": [-104.99404, 39.75621]
    }
};

The GeoJSON layer

GeoJSON objects are added to the map through a GeoJSON layer. To create it and add it to a map, we can use the following code:

L.geoJSON(geojsonFeature).addTo(map);

GeoJSON objects may also be passed as an array of valid GeoJSON objects.

var myLines = [{
    "type": "LineString",
    "coordinates": [[-100, 40], [-105, 45], [-110, 55]]
}, {
    "type": "LineString",
    "coordinates": [[-105, 40], [-110, 45], [-115, 55]]
}];

Alternatively, we could create an empty GeoJSON layer and assign it to a variable so that we can add more features to it later.

或者，我们可以创建一个空的GeoJSON层，并将其分配给一个变量，以便以后可以向其添加更多特性。