如何在openalyers3中使用你的方向服务绘制不同颜色的折线

时间：2016-01-07 10:06:02

标签： service colors openlayers-3 direction

我正在使用您的方向服务绘制折线，如下面的示例所示

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
   <!-- <link rel="stylesheet" href="http://openlayers.org/en/v3.2.1/css/ol.css" type="text/css">-->
</head>
<body>
<div id="map" class="map"></div>
<link rel="stylesheet" href="http://openlayers.org/en/v3.12.1/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.12.1/build/ol.js"></script>


<script>
    var image = new ol.style.Circle({
        radius: 5,
        fill: null,
        stroke: new ol.style.Stroke({color: 'red', width: 1})
    });
    var styles = {
        'Point': new ol.style.Style({
            image: image
        }),
        'LineString': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'green',
                width: 3
            })
        }),
        'MultiLineString': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'rose',
                width: 1
            })
        }),
        'MultiPoint': new ol.style.Style({
            image: image
        }),
        'MultiPolygon': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'yellow',
                width: 1
            }),
            fill: new ol.style.Fill({
                color: 'rgba(255, 255, 0, 0.1)'
            })
        }),
        'Polygon': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'blue',
                lineDash: [4],
                width: 3
            }),
            fill: new ol.style.Fill({
                color: 'rgba(0, 0, 255, 0.1)'
            })
        }),
        'GeometryCollection': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'magenta',
                width: 2
            }),
            fill: new ol.style.Fill({
                color: 'magenta'
            }),
            image: new ol.style.Circle({
                radius: 10,
                fill: null,
                stroke: new ol.style.Stroke({
                    color: 'magenta'
                })
            })
        }),
        'Circle': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'red',
                width: 2
            }),
            fill: new ol.style.Fill({
                color: 'rgba(255,0,0,0.2)'
            })
        })
    };

    var styleFunction = function(feature, resolution) {
        return styles[feature.getGeometry().getType()];
    };

    var geojsonObject = {
        "type": "LineString",
        "crs": {
            "type": "name",
            "properties": {
                "name": "urn:ogc:def:crs:OGC:1.3:CRS84"
            }
        },
        "coordinates":
                [

                    [103.984865, 1.350197]
                    ,[103.985188, 1.350903]
                    ,[103.985376, 1.351149]
                    ,[103.985477, 1.351341]
                    ,[103.986155, 1.352857]
                    ,[103.986195, 1.352982]
                    ,[103.986248, 1.353248]
                    ,[103.986393, 1.353593]
                    ,[103.986564, 1.353550]
                    ,[103.985175, 1.350160]
                    ,[103.985138, 1.350069]
                ],  "properties": {
            "distance": "21.452372",
            "description": "To enable simple instructions add: 'instructions=1' as parameter to the URL",
            "traveltime": "1228"
        }
    };
    //console.log(geojsonObject.coordinates);
    var routeGeom = new ol.geom.LineString(geojsonObject.coordinates).transform('EPSG:4326','EPSG:3857');
    var routeFeature = new ol.Feature({
        geometry:routeGeom
    })
    var extentToZoom = routeGeom.getExtent();
    console.log(extentToZoom);

    console.log(routeFeature);
    var vectorSource = new ol.source.Vector({
        features: [routeFeature]
    });

    //vectorSource.addFeature(new ol.Feature(new ol.geom.Circle([5e6, 7e6], 1e6)));

    var vectorLayer = new ol.layer.Vector({
        source: vectorSource,
        style: styleFunction
    });

    var map = new ol.Map({
        layers: [
            new ol.layer.Tile({
                source: new ol.source.XYZ({
                            urls : ["http://b.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png","http://b.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png","http://b.basemaps.cartocdn.com/light_all//{z}/{x}/{y}.png"]


                        })
            }),
            vectorLayer
        ],
        target: 'map',
        controls: ol.control.defaults({
            attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
                collapsible: false
            })
        }),
        view: new ol.View({
            center: ol.proj.fromLonLat([103.986908, 1.353199]),
            rotation: 68*Math.PI/180,
            zoom: 18
        })
    });
    map.getView().fit(extentToZoom,map.getSize())
</script>

</body>
</html>

但是知道我想绘制不同的颜色线，例如在样本中我想要绿色的第一行和蓝色的下一行（知道它是绿色本身）同样有太多的情节我想要绘制它有不同的颜色

使用multiString我能够做到但是对于上面的示例我不知道如何开始请指向我样本或指导我如何做

1 个答案:

答案 0 :(得分：1)

为要添加的每个LineString要素添加属性，并在样式数组中添加具有所需颜色的样式，并在样式函数中，使用该属性从该数组中选择相关样式。我在这里编辑了你的代码，

 <!DOCTYPE html>
    <html>
    <head lang="en">
    <meta charset="UTF-8">
    <title></title>
   <!-- <link rel="stylesheet" href="http://openlayers.org/en/v3.2.1/css/ol.css"        type="text/css">-->
</head>
<body>
<div id="map" class="map"></div>
<link rel="stylesheet" href="http://openlayers.org/en/v3.12.1/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.12.1/build/ol.js"></script>


<script>
    var styles = {
        'greenRoute': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'green',
                width: 3
            })
        }),
        'redRoute': new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'red',
                width: 3
            })
        })
    };

    var styleFunction = function(feature, resolution) {
        return styles[feature.get("fName")];
    };

    var geojsonObject = {
        "type": "LineString",
        "crs": {
            "type": "name",
            "properties": {
                "name": "urn:ogc:def:crs:OGC:1.3:CRS84"
            }
        },
        "coordinates":
                [

                    [103.984865, 1.350197]
                    ,[103.985188, 1.350903]
                    ,[103.985376, 1.351149]
                    ,[103.985477, 1.351341]
                    ,[103.986155, 1.352857]
                    ,[103.986195, 1.352982]
                    ,[103.986248, 1.353248]
                    ,[103.986393, 1.353593]
                    ,[103.986564, 1.353550]
                    ,[103.985175, 1.350160]
                    ,[103.985138, 1.350069]
                ],  "properties": {
            "distance": "21.452372",
            "description": "To enable simple instructions add: 'instructions=1' as parameter to the URL",
            "traveltime": "1228"
        }
    };
    //console.log(geojsonObject.coordinates);
    var routeGeom = new ol.geom.LineString(geojsonObject.coordinates).transform('EPSG:4326','EPSG:3857');
    var redRouteGeom = new ol.geom.LineString([
                    [103.984865, 1.350197]
                    ,[103.985188, 1.350903]
                    ,[103.985138, 1.350069]
                ]).transform('EPSG:4326','EPSG:3857');
    var routeFeature = new ol.Feature({
        geometry:routeGeom,
        fName: "greenRoute"
    })
    var redRoute = new ol.Feature({
        geometry:redRouteGeom,
        fName: "redRoute"
    })
    var extentToZoom = routeGeom.getExtent();
    console.log(extentToZoom);

    console.log(routeFeature);
    var vectorSource = new ol.source.Vector({
        features: [routeFeature,redRoute]
    });

    //vectorSource.addFeature(new ol.Feature(new ol.geom.Circle([5e6, 7e6], 1e6)));

    var vectorLayer = new ol.layer.Vector({
        source: vectorSource,
        style : styleFunction
    });

    var map = new ol.Map({
        layers: [
            new ol.layer.Tile({
                source: new ol.source.XYZ({
                            urls : ["http://b.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png","http://b.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png","http://b.basemaps.cartocdn.com/light_all//{z}/{x}/{y}.png"]


                        })
            }),
            vectorLayer
        ],
        target: 'map',
        controls: ol.control.defaults({
            attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
                collapsible: false
            })
        }),
        view: new ol.View({
            center: ol.proj.fromLonLat([103.986908, 1.353199]),
            rotation: 68*Math.PI/180,
            zoom: 18
        })
    });
    map.getView().fit(extentToZoom,map.getSize());
    var select_interaction = new ol.interaction.Select();


    select_interaction.on("select", function (e) { 
    // do something. e.element is the feature which was added
    var evt= e.selected;
    });
    map.addInteraction(select_interaction);
</script>

</body>
</html>
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