( function() {
"use strict";
/**
* WCS 레이어 객체.
*
* WCS 서비스를 표현할 수 있는 레이어 객체.
*
* @constructor
*
* @example
*
* <pre>
* var ugWcsLayer = new ugmp.layer.uGisWCSLayer( {
* useProxy : false,
* serviceURL : 'http://mapstudio.uitgis.com/ms/wcs?KEY=key',
* format : 'image/jpeg',
* version : '2.0.1',
* identifier : 'LAYER_ID',
* boundingBox : [...],
* useScaleRefresh : false
* } );
* </pre>
*
* @param opt_options {Object}
* @param opt_options.useProxy {Boolean} 프록시 사용 여부. Default is `false`.
* @param opt_options.serviceURL {String} WCS 서비스 URL.
*
* @param opt_options.format {String} 이미지 포맷. Default is `image/jpeg`.
* @param opt_options.version {String} WCS 버전. Default is `1.1.1`.
* @param opt_options.identifier {String} 레이어 아이디.
* @param opt_options.boundingBox {Array} boundingBox. `※EPSG:4326`.
* @param opt_options.useScaleRefresh {Boolean} 이미지 해상도 자동 새로고침 사용 여부. Default is `false`.
*
* @Extends {ugmp.layer.uGisLayerDefault}
*
* @class
*/
ugmp.layer.uGisWCSLayer = ( function(opt_options) {
var _self = this;
var _super = null;
this.format = null;
this.version = null;
this.identifier = null;
this.coverageId = null;
this.boundingBox = null;
this.useScaleRefresh = null;
this.key_moveEnd = null;
this.key_changeView = null;
/**
* Initialize
*/
( function() {
var options = opt_options || {};
options.layerType = "WCS";
options.useGetFeature = false;
_super = ugmp.layer.uGisLayerDefault.call( _self, options );
_self.version = ( options.version !== undefined ) ? options.version : "1.1.1";
_self.format = ( options.format !== undefined ) ? options.format : "image/jpeg";
_self.identifier = ( options.identifier !== undefined ) ? options.identifier : "";
_self.coverageId = ( options.coverageId !== undefined ) ? options.coverageId : "";
_self.useScaleRefresh = ( typeof ( options.useScaleRefresh ) === "boolean" ) ? options.useScaleRefresh : false;
_self.boundingBox = _self._setBoundingBox( options.boundingBox );
_self.olLayer = new ol.layer.Image( {} );
} )();
// END Initialize
return ugmp.util.uGisUtil.objectMerge( _super, {
_this : _self,
setMap : _self.setMap,
update : _self._update,
version : _self.version,
identifier : _self.identifier,
useScaleRefresh : _self.useScaleRefresh,
setBoundingBox : _self._setBoundingBox,
getBoundingBox : _self.getBoundingBox
} );
} );
ugmp.layer.uGisWCSLayer.prototype = Object.create( ugmp.layer.uGisLayerDefault.prototype );
ugmp.layer.uGisWCSLayer.prototype.constructor = ugmp.layer.uGisWCSLayer;
/**
* BoundingBox를 설정한다.
*
* @private
*
* @param boundingBox {Array.<Double>} boundingBox.
*/
ugmp.layer.uGisWCSLayer.prototype._setBoundingBox = function(boundingBox_) {
var _self = this._this || this;
if ( boundingBox_ && boundingBox_.length > 3 ) {
_self.boundingBox = boundingBox_.slice();
if ( !boundingBox_[ 4 ] ) {
_self.boundingBox.push( "EPSG:4326" );
}
} else {
_self.boundingBox = undefined;
}
return _self.boundingBox;
};
/**
* Map을 설정한다. 해당 Map을 통해 Coverage의 BOUNDINGBOX를 갱신한다.
*
* @param olMap {ol.Map}
* @param load {Function} 로드 함수.
*/
ugmp.layer.uGisWCSLayer.prototype.setMap = function(olMap_, load_) {
var _self = this._this || this;
_self._update( olMap_.getView(), load_ );
if ( olMap_ && _self.useScaleRefresh ) {
ol.Observable.unByKey( _self.key_moveEnd );
_self.key_moveEnd = olMap_.on( "moveend", function() {
_self._update( olMap_.getView(), load_ );
} );
}
_self.key_changeView = olMap_.once( "change:view", function() {
_self.setMap( olMap_, load_ );
} );
};
/**
* WCS Param을 설정하고 갱신한다.
*
* @private
*
* @param view {ol.View} View 객체.
* @param load {Function} 로드 함수.
*/
ugmp.layer.uGisWCSLayer.prototype._update = function(view_, load_) {
var _self = this._this || this;
var viewExtent = view_.calculateExtent();
viewExtent = ol.proj.transformExtent( viewExtent, view_.getProjection(), "EPSG:4326" );
if ( !ol.extent.intersects( viewExtent, _self.boundingBox ) ) {
return false;
}
var params = {
SERVICE : "WCS",
REQUEST : "GetCoverage",
FORMAT : _self.format,
VERSION : _self.version,
IDENTIFIER : _self.identifier,
COVERAGEID : _self.identifier,
BOUNDINGBOX : _self.boundingBox
};
if ( _self.version === "2.0.1" ) {
delete params.IDENTIFIER;
} else {
delete params.COVERAGEID;
}
if ( _self.useScaleRefresh ) {
var poly1 = turf.polygon( [ [ [ viewExtent[ 0 ], viewExtent[ 1 ] ], [ viewExtent[ 0 ], viewExtent[ 3 ] ], [ viewExtent[ 2 ], viewExtent[ 3 ] ],
[ viewExtent[ 2 ], viewExtent[ 1 ] ], [ viewExtent[ 0 ], viewExtent[ 1 ] ] ] ] );
var poly2 = turf.polygon( [ [ [ _self.boundingBox[ 0 ], _self.boundingBox[ 1 ] ], [ _self.boundingBox[ 0 ], _self.boundingBox[ 3 ] ],
[ _self.boundingBox[ 2 ], _self.boundingBox[ 3 ] ], [ _self.boundingBox[ 2 ], _self.boundingBox[ 1 ] ],
[ _self.boundingBox[ 0 ], _self.boundingBox[ 1 ] ] ] ] );
var intersection = turf.intersect( poly1, poly2 );
var intersectCoordinate = intersection.geometry.coordinates[ 0 ];
var intersectExtent = [ intersectCoordinate[ 0 ][ 0 ], intersectCoordinate[ 0 ][ 1 ], intersectCoordinate[ 2 ][ 0 ], intersectCoordinate[ 2 ][ 1 ] ];
if ( intersectExtent[ 0 ] > intersectExtent[ 2 ] ) {
var temp = intersectExtent[ 2 ];
intersectExtent[ 2 ] = intersectExtent[ 0 ];
intersectExtent[ 0 ] = temp;
}
if ( intersectExtent[ 1 ] > intersectExtent[ 3 ] ) {
var temp = intersectExtent[ 3 ];
intersectExtent[ 3 ] = intersectExtent[ 1 ];
intersectExtent[ 1 ] = temp;
}
params.BOUNDINGBOX = intersectExtent;
}
params.BOUNDINGBOX.push( "EPSG:4326" );
if ( _self.useProxy ) {
_self.getGetCoverageURL = ugmp.uGisConfig.getProxy() + ugmp.util.uGisUtil.appendParams( _self.getServiceURL(), params );
} else {
_self.getGetCoverageURL = ugmp.util.uGisUtil.appendParams( _self.getServiceURL(), params );
}
load_( true );
_self.olLayer.setSource( new ol.source.ImageStatic( {
url : _self.getGetCoverageURL,
// projection : view_.getProjection(),
projection : "EPSG:4326",
imageExtent : params.BOUNDINGBOX,
imageLoadFunction : function(image, src) {
var imageElement = image.getImage();
imageElement.onload = function() {
load_( false );
};
imageElement.onerror = function() {
load_( false );
};
imageElement.src = src;
}
} ) );
};
/**
* BoundingBox를 가져온다.
*
* @return BoundingBox {Array.<Double>} BoundingBox.
*/
ugmp.layer.uGisWCSLayer.prototype.getBoundingBox = function() {
var _self = this._this || this;
return _self.boundingBox;
};
/**
* GetFeature 사용 여부를 설정한다.
*
* @override
*
* @param state {Boolean} GetFeature 사용 여부.
*/
ugmp.layer.uGisWCSLayer.prototype.setUseGetFeature = function() {
var _self = this._this || this;
_self.useGetFeature = false;
};
/**
* 레이어를 destroy한다.
*
* @override
*/
ugmp.layer.uGisWCSLayer.prototype.destroy = function() {
var _self = this._this || this;
ol.Observable.unByKey( _self.key_moveEnd );
ol.Observable.unByKey( _self.key_changeView );
};
} )();
OpenLayers - uGisMapPlatForm API