在cesium添加arcgis图层的时候，会遇到这个错误，显示4490坐标系不支持。
通过修改源码，可以实现对于该数据的支持。
目前，我的开发版本是1.62，仅供参考
需要修改的部分有：
1.修改 ArcGisMapServerImageryProvider.js
177行
} else if(data.tileInfo.spatialReference.wkid === 4490){
that._tilingScheme = new GeographicTilingScheme({
ellipsoid : options.ellipsoid,
tileInfo:data.tileInfo
});
修改位置
200行
} else if (data.fullExtent.spatialReference.wkid === 4326
|| data.fullExtent.spatialReference.wkid === 4490) {
that._rectangle = Rectangle.fromDegrees(data.fullExtent.xmin, data.fullExtent.ymin,
data.fullExtent.xmax, data.fullExtent.ymax);
image.png
2.修改GeographicTilingScheme.js
我把全文都粘贴上了，可以自己看一下
define([
'./Cartesian2',
'./Check',
'./defaultValue',
'./defined',
'./defineProperties',
'./Ellipsoid',
'./GeographicProjection',
'./Math',
'./Rectangle'
], function(
Cartesian2,
Check,
defaultValue,
defined,
defineProperties,
Ellipsoid,
GeographicProjection,
CesiumMath,
Rectangle) {
'use strict';
/**
* A tiling scheme for geometry referenced to a simple {@link GeographicProjection} where
* longitude and latitude are directly mapped to X and Y. This projection is commonly
* known as geographic, equirectangular, equidistant cylindrical, or plate carrée.
*
* @alias GeographicTilingScheme
* @constructor
*
* @param {Object} [options] Object with the following properties:
* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid whose surface is being tiled. Defaults to
* the WGS84 ellipsoid.
* @param {Rectangle} [options.rectangle=Rectangle.MAX_VALUE] The rectangle, in radians, covered by the tiling scheme.
* @param {Number} [options.numberOfLevelZeroTilesX=2] The number of tiles in the X direction at level zero of
* the tile tree.
* @param {Number} [options.numberOfLevelZeroTilesY=1] The number of tiles in the Y direction at level zero of
* the tile tree.
*/
function GeographicTilingScheme(options) {
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
// this._ellipsoid = defaultValue(options.ellipsoid, Ellipsoid.WGS84);
// this._rectangle = defaultValue(options.rectangle, Rectangle.MAX_VALUE);
// this._projection = new GeographicProjection(this._ellipsoid);
// this._numberOfLevelZeroTilesX = defaultValue(options.numberOfLevelZeroTilesX, 2);
// this._numberOfLevelZeroTilesY = defaultValue(options.numberOfLevelZeroTilesY, 1);
if( defined(options.tileInfo)
&& defined(options.tileInfo.spatialReference)
&& defined(options.tileInfo.spatialReference.wkid)
&& options.tileInfo.spatialReference.wkid == 4490 )
{
this._tileInfo = options.tileInfo;
this._ellipsoid = defaultValue(options.ellipsoid, Ellipsoid.CGCS2000);
this._rectangle = defaultValue(options.rectangle, Rectangle.fromDegrees(-180, -90, 180, 90));
this._numberOfLevelZeroTilesX = defaultValue(options.numberOfLevelZeroTilesX, 4);
this._numberOfLevelZeroTilesY = defaultValue(options.numberOfLevelZeroTilesY, 2);
}
else
{
this._ellipsoid = defaultValue(options.ellipsoid, Ellipsoid.WGS84);
this._rectangle = defaultValue(options.rectangle, Rectangle.MAX_VALUE);
this._numberOfLevelZeroTilesX = defaultValue(options.numberOfLevelZeroTilesX, 2);
this._numberOfLevelZeroTilesY = defaultValue(options.numberOfLevelZeroTilesY, 1);
}
this._projection = new GeographicProjection(this._ellipsoid);
}
defineProperties(GeographicTilingScheme.prototype, {
/**
* Gets the ellipsoid that is tiled by this tiling scheme.
* @memberof GeographicTilingScheme.prototype
* @type {Ellipsoid}
*/
ellipsoid : {
get : function() {
return this._ellipsoid;
}
},
/**
* Gets the rectangle, in radians, covered by this tiling scheme.
* @memberof GeographicTilingScheme.prototype
* @type {Rectangle}
*/
rectangle : {
get : function() {
return this._rectangle;
}
},
/**
* Gets the map projection used by this tiling scheme.
* @memberof GeographicTilingScheme.prototype
* @type {MapProjection}
*/
projection : {
get : function() {
return this._projection;
}
}
});
/**
* Gets the total number of tiles in the X direction at a specified level-of-detail.
*
* @param {Number} level The level-of-detail.
* @returns {Number} The number of tiles in the X direction at the given level.
*/
GeographicTilingScheme.prototype.getNumberOfXTilesAtLevel = function(level) {
// return this._numberOfLevelZeroTilesX << level;
if(!defined(this._tileInfo))
{
return this._numberOfLevelZeroTilesX << level;
}
else
{
var currentMatrix = this._tileInfo.lods.filter(function(item){
return item.level === level;
});
var currentResolution = currentMatrix[0].resolution;
return Math.round(CesiumMath.toDegrees(CesiumMath.TWO_PI) / (this._tileInfo.rows * currentResolution));
}
};
/**
* Gets the total number of tiles in the Y direction at a specified level-of-detail.
*
* @param {Number} level The level-of-detail.
* @returns {Number} The number of tiles in the Y direction at the given level.
*/
GeographicTilingScheme.prototype.getNumberOfYTilesAtLevel = function(level) {
// return this._numberOfLevelZeroTilesY << level;
if(!defined(this._tileInfo))
{
return this._numberOfLevelZeroTilesY << level;
}
else
{
var currentMatrix = this._tileInfo.lods.filter(function(item){
return item.level === level;
});
var currentResolution = currentMatrix[0].resolution;
return Math.round(CesiumMath.toDegrees(CesiumMath.TWO_PI / 2) / (this._tileInfo.cols * currentResolution));
}
};
/**
* Transforms a rectangle specified in geodetic radians to the native coordinate system
* of this tiling scheme.
*
* @param {Rectangle} rectangle The rectangle to transform.
* @param {Rectangle} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Rectangle} The specified 'result', or a new object containing the native rectangle if 'result'
* is undefined.
*/
GeographicTilingScheme.prototype.rectangleToNativeRectangle = function(rectangle, result) {
//>>includeStart('debug', pragmas.debug);
Check.defined('rectangle', rectangle);
//>>includeEnd('debug');
var west = CesiumMath.toDegrees(rectangle.west);
var south = CesiumMath.toDegrees(rectangle.south);
var east = CesiumMath.toDegrees(rectangle.east);
var north = CesiumMath.toDegrees(rectangle.north);
if (!defined(result)) {
return new Rectangle(west, south, east, north);
}
result.west = west;
result.south = south;
result.east = east;
result.north = north;
return result;
};
/**
* Converts tile x, y coordinates and level to a rectangle expressed in the native coordinates
* of the tiling scheme.
*
* @param {Number} x The integer x coordinate of the tile.
* @param {Number} y The integer y coordinate of the tile.
* @param {Number} level The tile level-of-detail. Zero is the least detailed.
* @param {Object} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Rectangle} The specified 'result', or a new object containing the rectangle
* if 'result' is undefined.
*/
GeographicTilingScheme.prototype.tileXYToNativeRectangle = function(x, y, level, result) {
var rectangleRadians = this.tileXYToRectangle(x, y, level, result);
rectangleRadians.west = CesiumMath.toDegrees(rectangleRadians.west);
rectangleRadians.south = CesiumMath.toDegrees(rectangleRadians.south);
rectangleRadians.east = CesiumMath.toDegrees(rectangleRadians.east);
rectangleRadians.north = CesiumMath.toDegrees(rectangleRadians.north);
return rectangleRadians;
};
/**
* Converts tile x, y coordinates and level to a cartographic rectangle in radians.
*
* @param {Number} x The integer x coordinate of the tile.
* @param {Number} y The integer y coordinate of the tile.
* @param {Number} level The tile level-of-detail. Zero is the least detailed.
* @param {Object} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Rectangle} The specified 'result', or a new object containing the rectangle
* if 'result' is undefined.
*/
GeographicTilingScheme.prototype.tileXYToRectangle = function(x, y, level, result) {
// var rectangle = this._rectangle;
// var xTiles = this.getNumberOfXTilesAtLevel(level);
// var yTiles = this.getNumberOfYTilesAtLevel(level);
// var xTileWidth = rectangle.width / xTiles;
// var west = x * xTileWidth + rectangle.west;
// var east = (x + 1) * xTileWidth + rectangle.west;
// var yTileHeight = rectangle.height / yTiles;
// var north = rectangle.north - y * yTileHeight;
// var south = rectangle.north - (y + 1) * yTileHeight;
// if (!defined(result)) {
// result = new Rectangle(west, south, east, north);
// }
// result.west = west;
// result.south = south;
// result.east = east;
// result.north = north;
// return result;
var rectangle = this._rectangle;
var west = 0;
var east = 0;
var north = 0;
var south = 0;
if(defined(this._tileInfo))
{
var currentMatrix = this._tileInfo.lods.filter(function(item){
return item.level === level;
});
var currentResolution = currentMatrix[0].resolution;
north = this._tileInfo.origin.y - y * (this._tileInfo.cols * currentResolution);
west = this._tileInfo.origin.x + x * (this._tileInfo.rows * currentResolution);
south = this._tileInfo.origin.y - (y + 1) * (this._tileInfo.cols * currentResolution);
east = this._tileInfo.origin.x + (x + 1) * (this._tileInfo.rows * currentResolution);
west = CesiumMath.toRadians(west);
north = CesiumMath.toRadians(north);
east = CesiumMath.toRadians(east);
south = CesiumMath.toRadians(south);
}
else
{
var xTiles = this.getNumberOfXTilesAtLevel(level);
var yTiles = this.getNumberOfYTilesAtLevel(level);
var xTileWidth = rectangle.width / xTiles;
west = x * xTileWidth + rectangle.west;
east = (x + 1) * xTileWidth + rectangle.west;
var yTileHeight = rectangle.height / yTiles;
north = rectangle.north - y * yTileHeight;
south = rectangle.north - (y + 1) * yTileHeight;
}
if (!defined(result)) {
result = new Rectangle(west, south, east, north);
}
result.west = west;
result.south = south;
result.east = east;
result.north = north;
return result;
};
/**
* Calculates the tile x, y coordinates of the tile containing
* a given cartographic position.
*
* @param {Cartographic} position The position.
* @param {Number} level The tile level-of-detail. Zero is the least detailed.
* @param {Cartesian2} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Cartesian2} The specified 'result', or a new object containing the tile x, y coordinates
* if 'result' is undefined.
*/
GeographicTilingScheme.prototype.positionToTileXY = function(position, level, result) {
var rectangle = this._rectangle;
if (!Rectangle.contains(rectangle, position)) {
// outside the bounds of the tiling scheme
return undefined;
}
if(defined(this._tileInfo))
{
var currentMatrix = this._tileInfo.lods.filter(function(item){
return item.level === level;
});
var currentResolution = currentMatrix[0].resolution;
var degLon = CesiumMath.toDegrees(position.longitude);
var degLat = CesiumMath.toDegrees(position.latitude);
var x_4490 = Math.floor( (degLon - this._tileInfo.origin.x) / (this._tileInfo.rows * currentResolution) );
var y_4490 = Math.floor( (this._tileInfo.origin.y - degLat) / (this._tileInfo.cols * currentResolution) );
return new Cartesian2(x_4490, y_4490);
}
var xTiles = this.getNumberOfXTilesAtLevel(level);
var yTiles = this.getNumberOfYTilesAtLevel(level);
var xTileWidth = rectangle.width / xTiles;
var yTileHeight = rectangle.height / yTiles;
var longitude = position.longitude;
if (rectangle.east < rectangle.west) {
longitude += CesiumMath.TWO_PI;
}
var xTileCoordinate = (longitude - rectangle.west) / xTileWidth | 0;
if (xTileCoordinate >= xTiles) {
xTileCoordinate = xTiles - 1;
}
var yTileCoordinate = (rectangle.north - position.latitude) / yTileHeight | 0;
if (yTileCoordinate >= yTiles) {
yTileCoordinate = yTiles - 1;
}
if (!defined(result)) {
return new Cartesian2(xTileCoordinate, yTileCoordinate);
}
result.x = xTileCoordinate;
result.y = yTileCoordinate;
return result;
};
return GeographicTilingScheme;
});
3.修改Ellipsoid.js
定义一个新的坐标系
Ellipsoid.CGCS2000 = Object.freeze(new Ellipsoid(6378137.0, 6378137.0, 6356752.31414035585));
image.png
4.编译cesium
因为这个示例的不支持跨域，所以考虑用vue设置了转发
image.png
image.png
结果
参考文章：
https://blog.csdn.net/yanasdf789/article/details/109103514
网友评论