问题描述
<!DOCTYPE html>
<html lang="en">
<head>
<Meta charset="utf-8"/>
<link rel="stylesheet" href="https://openlayers.org/en/v6.4.3/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v6.4.3/build/ol.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.6.1/proj4.js"></script>
<style>
html,body,.map {
margin: 0;
padding: 0;
width: 99%;
height: 95%;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<div id="mouse-position"></div>
<script>
proj4.defs("epsg:32643","+proj=utm +zone=43 +datum=wgs84 +units=m +no_defs");
ol.proj.proj4.register(proj4);
ol.proj.get("epsg:32643").setExtent([291627,904686,958569,1426831]);
var projection = new ol.proj.Projection({
code: 'epsg:32643',extent: [291627,1426831],});
var mousePositionControl = new ol.control.MousePosition({
coordinateFormat: ol.coordinate.createStringXY(4),projection: projection,//'epsg:32643',// comment the following two lines to have the mouse position
// be placed within the map.
className: 'custom-mouse-position',target: document.getElementById('mouse-position'),undefinedHTML: ' ',});
var scaleLine = new ol.control.ScaleLine({
units: 'metric',});
var map = new ol.Map({
controls: ol.control.defaults().extend([mousePositionControl,scaleLine]),target: 'map',layers: [
new ol.layer.Tile({
source: new ol.source.XYZ({
url: "http://103.10.168.74:8081/tms/1.0.0/district/distgrid" + "/{z}/{x}/{-y}.png",projection:projection,tileGrid: ol.tilegrid.createXYZ({
extent: [291627,maxResolution: 2605.2421875,tileSize: [256,256],maxZoom: 10,}),new ol.layer.Vector({
source: new ol.source.Vector({
features: [new ol.Feature({
geometry: new ol.geom.Point([614971.473,1218630.894]),})],renderBuffer: 200,style: new ol.style.Style({
image: new ol.style.Icon({
anchor: [0.5,46],anchorXUnits: 'fraction',anchorYUnits: 'pixels',src: 'https://openlayers.org/en/latest/examples/data/icon.png'
})
})
}),new ol.layer.Vector({
source: new ol.source.Vector({
features: [
new ol.Feature({
geometry: new ol.geom.Point([716446.977962414,942574.737260181]),})
]
})
})
],view: new ol.View({
projection: projection,units:"metric",zoom:1,maxResolution:2605.2421875,center:[654496.136597752,1155181.26900064],numZoomLevels:13,constrainOnlyCenter: true,maxZoom:10,minZoom:1,})
});
mousePositionControl.setProjection(projection);
</script>
</body>
</html>
我在ol6中添加了一个矢量层和一个图块层(mapnik和mapproxy)。但是投影存在问题,两层相距较远。我的代码是
<!DOCTYPE html>
<html lang="en">
<head>
<Meta charset="utf-8"/>
<link rel="stylesheet" href="https://openlayers.org/en/v6.4.3/css/ol.css" type="text/css">
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,.map {
margin: 0;
padding: 0;
width: 99%;
height: 99%;
border:1px solid #ccc;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script>
proj4.defs("epsg:32643","+proj=utm +zone=43 +datum=wgs84 +units=m +no_defs");
ol.proj.proj4.register(proj4);
//-----vector lyr-----
var london = new ol.Feature({
geometry: new ol.geom.Point(ol.proj.fromLonLat([8.5149092,76.9527723])),});
london.setStyle(
new ol.style.Style({
image: new ol.style.Icon({
color: '#4271AE',crossOrigin: 'anonymous',src: 'https://openlayers.org/en/latest/examples/data/icon.png',scale: 0.5,})
);
var vectorSource = new ol.source.Vector({
features: [london],projection: "epsg:32643",});
var vectorLayer = new ol.layer.Vector({
source: vectorSource,});
//-----vector lyr-----
var map = new ol.Map({
target: 'map',layers: [
new ol.layer.Tile({
source: new ol.source.XYZ({
url: "http://127.0.01:8080/tms/1.0.0/district/distgrid" + "/{z}/{x}/{-y}.png",vectorLayer
],view: new ol.View({
projection: "epsg:32643",units:"m",center:[8.5149092,76.9527723],})
});
map.getView().fit(vectorSource.getExtent());
map.getView().setZoom(map.getView().getZoom() - 10);
//map.getView().setCenter(ol.proj.transform([8.5149092,'epsg:32643','epsg:32643'));
</script>
</body>
</html>
我试图更改地图的中心,但是它不起作用。我的地图位于UTM 43N和epsg的“仪表”中:32643。 我在ol2中使用的程度是291627,1426831和maxResolution:2605.2421875。我还尝试将tileGrid添加到tile图层,但也无法正常工作。
var resolutions = [
2605.2421875,// don't kNow how to find resolution
];
tileGrid: new ol.tilegrid.TileGrid({
extent: [291627,resolutions: resolutions,
解决方法
您的几何形状和中心必须与视图在同一投影中
geometry: new ol.geom.Point(ol.proj.fromLonLat([8.5149092,76.9527723],"EPSG:32643")),center: ol.proj.fromLonLat([8.5149092,"EPSG:32643"),
您无需在vectorSource上设置投影。
如果您的图块网格的缩放级别为0到10 tileGrid
可以使用
tileGrid: ol.tilegrid.createXYZ({
extent: [291627,904686,958569,1426831],maxResolution: 2605.2421875,tileSize: [256,256],maxZoom: 10,}),
您可能还希望将投影范围设置为匹配
ol.proj.get("EPSG:32643").setExtent([291627,1426831]);
对于TMS源,其原点位于图块网格的左下方,OpenLayers希望maxResolution与网格范围的高度匹配,但在您的情况下,它与宽度匹配。解决该问题的一种方法是在高度等于宽度的情况下使用更大的范围。添加OSM图层显示它现在处于正确的位置。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<link rel="stylesheet" href="https://openlayers.org/en/v6.4.3/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v6.4.3/build/ol.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.6.1/proj4.js"></script>
<style>
html,body,.map {
margin: 0;
padding: 0;
width: 99%;
height: 95%;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<div id="mouse-position"></div>
<script>
proj4.defs("EPSG:32643","+proj=utm +zone=43 +datum=WGS84 +units=m +no_defs");
ol.proj.proj4.register(proj4);
ol.proj.get("EPSG:32643").setExtent([291627,1426831]);
var projection = new ol.proj.Projection({
code: 'EPSG:32643',extent: [291627,});
var mousePositionControl = new ol.control.MousePosition({
coordinateFormat: ol.coordinate.createStringXY(4),projection: projection,//'EPSG:32643',// comment the following two lines to have the mouse position
// be placed within the map.
className: 'custom-mouse-position',target: document.getElementById('mouse-position'),undefinedHTML: ' ',});
var scaleLine = new ol.control.ScaleLine({
units: 'metric',});
var extent = [291627,1426831];
var fullExtent = [extent[0],extent[1],extent[2],extent[1] + extent[2] - extent[0]];
var map = new ol.Map({
controls: ol.control.defaults().extend([mousePositionControl,scaleLine]),target: 'map',layers: [
new ol.layer.Tile({
source: new ol.source.XYZ({
url: "http://103.10.168.74:8081/tms/1.0.0/district/distgrid" + "/{z}/{x}/{-y}.png",projection:projection,tileGrid: ol.tilegrid.createXYZ({
extent: fullExtent,new ol.layer.Tile({
source: new ol.source.OSM(),opacity: 0.5,new ol.layer.Vector({
source: new ol.source.Vector({
features: [new ol.Feature({
geometry: new ol.geom.Point([614971.473,1218630.894]),})],renderBuffer: 200,style: new ol.style.Style({
image: new ol.style.Icon({
anchor: [0.5,46],anchorXUnits: 'fraction',anchorYUnits: 'pixels',src: 'https://openlayers.org/en/latest/examples/data/icon.png'
})
})
}),new ol.layer.Vector({
source: new ol.source.Vector({
features: [
new ol.Feature({
geometry: new ol.geom.Point([716446.977962414,942574.737260181]),})
]
})
})
],view: new ol.View({
projection: projection,units:"metric",zoom:1,maxResolution:2605.2421875,center:[654496.136597752,1155181.26900064],numZoomLevels:13,constrainOnlyCenter: true,maxZoom:10,minZoom:1,})
});
mousePositionControl.setProjection(projection);
</script>
</body>
</html>