前几天我使用OpenLayers 2.12做了一个 ArcGISCache 遮阳板，其中有一些瓷砖在这个文件夹和文件格式中：
_alllayers \ L04 \ R00000009 \ C00000a07.png
这意味着我的图块位于“_alllayers”文件夹内，然后位于其他文件夹内，表示缩放级别（L00，L01 ... L21）。在他们内部我有一些其他文件夹，其名称如下：“R00000009”，然后在这些文件夹中，我的图像名为：“C00000a07.png”。
当我为 OpenLayers 2.12 或 OpenLayers 2.14 做遮阳板时，我做得很好并且工作正常。但是当我尝试用 OpenLayers 3 做同样的事情时，它不起作用。
OpenLayers 2.12 / OpenLayers 2.14
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<script src="http://maps.google.com/maps/api/js?v=3&sensor=false"></script>
<meta name="apple-mobile-web-app-capable" content="yes">
<title>OpenLayers</title>
<style>
html, body, #map {
margin: 0;
width: 100%;
height: 100%;
}
</style>
<script src="lib/OpenLayers.2.14.js"></script>
<script>
var map,
cacheLayer,
testLayer,
//This layer requires meta data about the ArcGIS service. Typically you should use a
//JSONP call to get this dynamically. For this example, we are just going to hard-code
//an example that we got from here (yes, it's very big):
// http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer?f=json&pretty=true
layerInfo = {
"currentVersion" : 10.01,
"serviceDescription" : "This worldwide street map presents highway-level data for the world and street-level data for the United States, Canada, Japan, Southern Africa, and a number of countries in Europe and elsewhere. This comprehensive street map includes highways, major roads, minor roads, railways, water features, administrative boundaries, cities, parks, and landmarks, overlaid on shaded relief imagery for added context. The street map was developed by ESRI using ESRI basemap data, AND road data, USGS elevation data, and UNEP-WCMC parks and protected areas for the world, and Tele Atlas Dynamap� and Multinet� street data for North America and Europe. Coverage for street-level data in Europe includes Andorra, Austria, Belgium, Czech Republic, Denmark, France, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Luxembourg, Netherlands, Northern Ireland (Belfast only), Norway, Poland, Portugal, San Marino, Slovakia, Spain, Sweden, and Switzerland. Coverage for street-level data elsewhere in the world includes China (Hong Kong only), Colombia, Egypt (Cairo only), Indonesia (Jakarta only), Japan, Mexico (Mexico City only), Russia (Moscow and St. Petersburg only), South Africa, Thailand, and Turkey (Istanbul and Ankara only). For more information on this map, visit us \u003ca href=\"http://goto.arcgisonline.com/maps/World_Street_Map \" target=\"_new\"\u003eonline\u003c/a\u003e.",
"mapName" : "Layers",
"description" : "This worldwide street map presents highway-level data for the world and street-level data for the United States, Canada, Japan, Southern Africa, most countries in Europe, and several other countries. This comprehensive street map includes highways, major roads, minor roads, one-way arrow indicators, railways, water features, administrative boundaries, cities, parks, and landmarks, overlaid on shaded relief imagery for added context. The map also includes building footprints for selected areas in the United States and Europe and parcel boundaries for much of the lower 48 states.\n\nThe street map was developed by ESRI using ESRI basemap data, DeLorme base map layers, AND road data, USGS elevation data, UNEP-WCMC parks and protected areas for the world, Tele Atlas Dynamap� and Multinet� street data for North America and Europe, and First American parcel data for the United States. Coverage for street-level data in Europe includes Andorra, Austria, Belgium, Czech Republic, Denmark, France, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, San Marino, Slovakia, Spain, Sweden, and Switzerland. Coverage for street-level data elsewhere in the world includes China (Hong Kong only), Colombia, Egypt (Cairo only), Indonesia (Jakarta only), Japan, Mexico, Russia, South Africa, Thailand, and Turkey (Istanbul and Ankara only). For more information on this map, visit us online at http://goto.arcgisonline.com/maps/World_Street_Map\n",
"copyrightText" : "Sources: ESRI, DeLorme, AND, Tele Atlas, First American, ESRI Japan, UNEP-WCMC, USGS, METI, ESRI Hong Kong, ESRI Thailand, Procalculo Prosis",
"layers" : [
{
"id" : 0,
"name" : "World Street Map",
"parentLayerId" : -1,
"defaultVisibility" : true,
"subLayerIds" : null,
"minScale" : 0,
"maxScale" : 0
}
],
"tables" : [
],
"spatialReference" : {
"wkid" : 102100
},
"singleFusedMapCache" : true,
"tileInfo" : {
"rows" : 256,
"cols" : 256,
"dpi" : 96,
"format" : "JPEG",
"compressionQuality" : 90,
"origin" : {
"x" : -20037700,
"y" : 30241100
},
"spatialReference" : {
"wkid" : 102100
},
"lods" : [
{'level' : 0, 'resolution' : 156543.03403606807, 'scale' : 591657528},
{'level' : 1, 'resolution' : 78271.517018034036, 'scale' : 295828764},
{'level' : 2, 'resolution' : 39135.758509017018, 'scale' : 147914382},
{'level' : 3, 'resolution' : 19567.879254508509, 'scale' : 73957191},
{'level' : 4, 'resolution' : 9783.9394949623238, 'scale' : 36978595},
{'level' : 5, 'resolution' : 4891.9698797730935, 'scale' : 18489298},
{'level' : 6, 'resolution' : 2445.9849398865467, 'scale' : 9244649},
{'level' : 7, 'resolution' : 1222.992337651342, 'scale' : 4622324},
{'level' : 8, 'resolution' : 611.49616882567102, 'scale' : 2311162},
{'level' : 9, 'resolution' : 305.74808441283551, 'scale' : 1155581},
{'level' : 10, 'resolution' : 152.87417449834899, 'scale' : 577791},
{'level' : 11, 'resolution' : 76.436954957243259, 'scale' : 288895},
{'level' : 12, 'resolution' : 38.218609770552874, 'scale' : 144448},
{'level' : 13, 'resolution' : 19.109304885276437, 'scale' : 72224},
{'level' : 14, 'resolution' : 9.5546524426382184, 'scale' : 36112},
{'level' : 15, 'resolution' : 4.7773262213191092, 'scale' : 18056},
{'level' : 16, 'resolution' : 2.3886631106595546, 'scale' : 9028},
{'level' : 17, 'resolution' : 1.1943315553297773, 'scale' : 4514},
{'level' : 18, 'resolution' : 0.59716577766488865, 'scale' : 2257},
{'level' : 19, 'resolution' : 0.2984505969011938, 'scale' : 1128},
{'level' : 20, 'resolution' : 0.1492252984505969, 'scale' : 564},
{'level' : 21, 'resolution' : 0.061383456100245537, 'scale' : 282}
]
},
"initialExtent" : {
"xmin" : -20037507.0671618,
"ymin" : -20037507.0671618,
"xmax" : 20037507.0671618,
"ymax" : 20037507.0671619,
"spatialReference" : {
"wkid" : 102100
}
},
"fullExtent" : {
"xmin" : -20037507.0671618,
"ymin" : -20037507.0671618,
"xmax" : 20037507.0671618,
"ymax" : 20037507.0671619,
"spatialReference" : {
"wkid" : 102100
}
},
"units" : "esriMeters",
"supportedImageFormatTypes" : "PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,AI,BMP",
"documentInfo" : {
"Title" : "World Street Map",
"Author" : "ESRI",
"Comments" : "",
"Subject" : "streets, highways, major roads, railways, water features, administrative boundaries, cities, parks, protected areas, landmarks ",
"Category" : "transportation(Transportation Networks) ",
"Keywords" : "World, Global, 2009, Japan, UNEP-WCMC",
"Credits" : ""
},
"capabilities" : "Map"
};
function init() {
var maxExtent = new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34);
var layerMaxExtent = new OpenLayers.Bounds(
layerInfo.fullExtent.xmin,
layerInfo.fullExtent.ymin,
layerInfo.fullExtent.xmax,
layerInfo.fullExtent.ymax
);
var resolutions = [];
for (var i=0; i<layerInfo.tileInfo.lods.length; i++) {
resolutions.push(layerInfo.tileInfo.lods[i].resolution);
}
map = new OpenLayers.Map('map', {
maxExtent: maxExtent,
StartBounds: layerMaxExtent,
units: (layerInfo.units == "esriFeet") ? 'ft' : 'm',
resolutions: resolutions,
tileSize: new OpenLayers.Size(layerInfo.tileInfo.width, layerInfo.tileInfo.height),
projection: 'EPSG:' + layerInfo.spatialReference.wkid
});
cacheLayer = new OpenLayers.Layer.ArcGISCache( "AGSCache",
"http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers", {
isBaseLayer: false,
useArcGISServer: false,
resolutions: resolutions,
tileSize: new OpenLayers.Size(layerInfo.tileInfo.cols, layerInfo.tileInfo.rows),
tileOrigin: new OpenLayers.LonLat(layerInfo.tileInfo.origin.x , layerInfo.tileInfo.origin.y),
maxExtent: layerMaxExtent,
projection: 'EPSG:' + layerInfo.spatialReference.wkid
});
testLayer = new OpenLayers.Layer.Google(
"Google Streets",
{'sphericalMercator': true, numZoomLevels: 21}
);
map.addLayers([cacheLayer, testLayer]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.addControl( new OpenLayers.Control.MousePosition() );
map.zoomToExtent(new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34));
}
</script>
</head>
<body onload="init()">
<div id="map"></div>
</body>
</html>
正如我所说，这很好。但是当我尝试在OpenLayers 3上做同样的事情时，我做不到。我不知道为什么要求提供像服务一样的图像。
OpenLayers 3
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<script src="http://maps.google.com/maps/api/js?v=3&sensor=false"></script>
<meta name="apple-mobile-web-app-capable" content="yes">
<title>OpenLayers</title>
<style>
html, body, #map {
margin: 0;
width: 100%;
height: 100%;
}
</style>
<script src="lib/OpenLayers.3.js"></script>
<script>
function init(){
var url = 'http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers';
var layers = [
new ol.layer.Tile({
source: new ol.source.OSM()
}),
new ol.layer.Tile({
extent: [-20037507.0671618,-20037507.0671618,20037507.0671618,20037507.0671619],
source: new ol.source.TileArcGISRest({
url: url
})
})
];
var map = new ol.Map({
layers: layers,
target: 'map',
view: new ol.View({
center: [-20037700, 30241100],
zoom: 1
})
});
}
</script>
</head>
<body onload="init()">
<div id="map"></div>
</body>
</html>
当我尝试加载这个OpenLayers 3遮阳板时，我可以在控制台中看到一些404错误，这是它试图找到的URL类型：
http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/?F=image&FORMAT=PNG32&TRANSPARENT=true&SIZE=256%2C256&BBOX=-20037508.342789244%2C0%2C0%2C20037508.342789244&BBOXSR=3857&IMAGESR=3857&DPI=90
漂亮的打印
http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/?F=image
&FORMAT=PNG32
&TRANSPARENT=true
&SIZE=256%2C256
&BBOX=-20037508.342789244%2C0%2C0%2C20037508.342789244
&BBOXSR=3857
&IMAGESR=3857
&DPI=90
所以，我的问题是：
- 为什么OpenLayers 3要求的图像（图块）就像它背后的服务一样？
- 我可以在OpenLayers 3中使用我的磁贴吗？
我尝试使用以下模式更改网址：
http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/ImageServer
http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/ImageServer/export
http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/Tiles/{z}/{x}/{y}
修改
最后我已经解决了！我在Java中用一个程序来转换所有这些文件夹和图片名称。
我试图了解文件夹和图像名称的模式，最后我意识到文件夹的第一个字母表示行（R - >行），图像的第一个字母表示列（ C - ＆gt;列）。
删除第一个字母后，只需将十六进制数转换为十进制数，然后使用该新名称保存文件或文件夹。
如果有人需要帮助，我很乐意提供帮助。
答案 0 :(得分：1)
ol.source.ArcGISRest适用于ArcGIS服务器磁贴服务。对于ArcGISCache，您需要将ol.source.TileImage或ol.source.XYZ与自定义tileUrlFunction或tileLoadFunction一起使用。我更喜欢后者，因为那时我不必转换瓷砖坐标。像
function replacer(match, letter, value) {
var str = Number(value).toString(letter == 'L' ? 10 : 16);
var len = letter == 'L' ? 2 : 8;
while (str.length < len) {
str = '0' + str;
}
return letter + str;
}
var source = new ol.source.XYZ({
url: 'http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/L{z}/R{x}/C{y}.png',
tileLoadFunction: function(image, url) {
image.getImage().src = url
.replace(/(L)([0-9]+)/, replacer)
.replace(/(R)([0-9]+)/, replacer)
.replace(/(C)([0-9]+)/, replacer);
}
});
答案 1 :(得分：0)
@ahocevar解决方案有效。但是我不得不在URL中交换x和y。
url: 'http://MY_IP:MY_PORT/MY_FOLDER/Layers/_alllayers/L{z}/R{y}/C{x}.png'
这是有道理的，因为y会映射到行，而x会映射到列。