使用 Openlayers 加载 ImageServer 数据

Question

所以我正在尝试使用 openlayers 5.2 加载 ArcGOS ImageServer，但我真的很难让任何东西正常工作。我编写的代码基于此示例 http://openlayers.org/en/latest/examples/vector-esri.html. Here is my modified version for ImageServer instead of FeatureServer. The url that i generate is valid，但我不确定如何根据需要将图像添加到源中。

如果有人有任何想法请告诉我。

  var imageUrl = 'https://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Portland/Aerial/ImageServer';
  var xyzGrid = new ol.tilegrid.createXYZ({
    tileSize: 512
  });

  var featureSource = new ol.source.Vector({
    loader: function(extent, resolution, projection) {
      var url = imageUrl + '/exportImage?bbox=' + extent.join(",") +
        '&imageSR=102100' +
        '&bboxSR=102100' +
        '&pixelType=U8' +
        '&f=pjson' +
        '&size=512%2C512';

      $.ajax({
        url: url,
        dataType: 'jsonp',
        success: function(response) {
          console.log(response)
          if (response.error) {
            console.log(response.error.message + '\n' + response.error.details.join('\n'));
          } else {
            var source = new ol.source.Image({
              url: response.href,
              projection: projection,
              imageExtent: extent
            });
            featureSource.addFeatures(source);
          }
        }});
    },
    strategy: new ol.loadingstrategy.tile(xyzGrid)
  });
  var featureService = new ol.layer.Vector({
    title: 'ImageServer',
    source: featureSource,
  });
  layers.push(featureService);

Answer 1

没关系，TileArcGISRest 工作正常，但我只需要

params: {
  'FORMAT': 'png'
}

因为我的测试服务器不支持默认的 "PNG32" 格式。

使用 Openlayers 加载 ImageServer 数据

Loading ImageServer data with Openlayers

arcgis

openlayers