Question

<!DOCTYPE html>
<html>
<head>
<title> OSM </title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://openlayers.org/en/v3.10.1/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.10.1/build/ol.js"></script>
<link rel="stylesheet" href="newcss.css" type="text/css" media="screen" />

</head>
<body>
    <h3 ALIGN="CENTER"> Project OSM</h3>
<div class="container-fluid">

<div class="row-fluid">
  <div class="span12">
    <div id="map" class="map"></div>
  </div>
</div>
</div>
<script>
var map = new ol.Map({
  controls: ol.control.defaults({}).extend([
    new ol.control.ZoomToExtent({})
  ]),
  layers: [
    new ol.layer.Tile({
      source: new ol.source.OSM()
    }),
    new ol.layer.Image({
      source: new ol.source.ImageStatic({
                    url: '...i will put after ...',
                    imageSize: [1000, 1000],
                    imageExtent: [0, 0, 1000, 1000]
                })
            })
  ],
  target: 'map',
  view: new ol.View({
    center: [261487.4908, 6250012.1599],
    zoom: 19
  })
});

</script>
</body>
</html>

我想在地图上放置图片，我尝试使用ol.layer.Image和ol.source.ImageStatic，我放url，imagesize和extent，但我看不到任何内容，也许我应该输入代码projection，但对于view我选择espg 3857。

祝你好运

Answer 1

你要问自己的第一件事是：

在官方例子中是否有任何我需要的例子（直到现在 - 134）？

答案可能是：

是

好的，有点OFF主题。所以你有（http://openlayers.org/en/v3.11.0/examples/static-image.html）：

// create a projection based on your image
var extent = [0, 0, 1024, 968]; // <--- image extent in pixels
var projection = new ol.proj.Projection({
  code: 'xkcd-image',
  units: 'pixels',
  extent: extent
});

// layer creation
new ol.layer.Image({
  source: new ol.source.ImageStatic({
    url: 'http://...',
    projection: projection,
    imageExtent: extent
  })
})

// and finally ol.View
new ol.View({
  projection: projection,
  center: ol.extent.getCenter(extent),
  zoom: 2,
  maxZoom: 8
})

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