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ArcGIS Flex API 调用天地图和Google地图服务

发布时间：2020-12-15 04:12:14 所属栏目：百科 来源：网络整理
导读：Esri为我们提供了TiledMapServiceLayer类，这个类正是所有瓦片地图服务都必须继承的类，像ArcGISTiledMapServiceLayer,OpenStreetMapLayer,VETiledLayer等esri提供的瓦片类都是继承了该类的，所以我们要扩展该TiledMapServiceLayer类 一.调用天地图服务（ SX

Esri为我们提供了TiledMapServiceLayer类，这个类正是所有瓦片地图服务都必须继承的类，像ArcGISTiledMapServiceLayer,OpenStreetMapLayer,VETiledLayer等esri提供的瓦片类都是继承了该类的，所以我们要扩展该TiledMapServiceLayer类

一.调用天地图服务（SXGeoTileLayer类）

[plain] view plain copy print ?
  1. import?com.esri.ags.SpatialReference;??
  2. import?com.esri.ags.geometry.Extent;??
  3. import?com.esri.ags.geometry.MapPoint;??
  4. import?com.esri.ags.layers.supportClasses.LOD;??
  5. import?com.esri.ags.layers.supportClasses.TileInfo;??
  6. import?com.esri.ags.layers.TiledMapServiceLayer;??
  7. import?com.esri.ags.layers.TiledMapServiceLayer;??
  8. ??
  9. import?flash.geom.Point;??
  10. import?flash.net.URLRequest;??
  11. ??
  12. /**??
  13. ?*?SXGeoTileLayer???
  14. ?*/??
  15. public?class?SXGeoTileLayer?extends?TiledMapServiceLayer??
  16. {??
  17. ?//--------------------------------------------------------------------------??
  18. ?//??
  19. ?//??Constructor??
  20. ?//??
  21. ?//--------------------------------------------------------------------------??
  22. ???
  23. ?/**??
  24. ??*?Creates?a?new?PortlandTiledMapServiceLayer?object.??
  25. ??*/??
  26. ?public?function?SXGeoTileLayer()??
  27. ?{??
  28. ??super();??
  29. ????
  30. ??buildTileInfo();?//?to?create?our?hardcoded?tileInfo???
  31. ????
  32. ??setLoaded(true);?//?Map?will?only?use?loaded?layers??
  33. ?}??
  34. ???
  35. ?//--------------------------------------------------------------------------??
  36. ?//??
  37. ?//??Variables??
  38. ?//??
  39. ?//--------------------------------------------------------------------------??
  40. ???
  41. ?private?var??wkid:int?=?4326;??
  42. ?private?var?_tileInfo:TileInfo?=?new?TileInfo();??//?see?buildTileInfo()???
  43. ?private?var?_url:String?=?new?String();??
  44. ?//private?var?_wmsLayer:String?=?new?String();???
  45. ???
  46. ?//--------------------------------------------------------------------------??
  47. ?//??
  48. ?//??Overridden?properties??
  49. ?//??????fullExtent()??
  50. ?//??????initialExtent()??
  51. ?//??????spatialReference()??
  52. ?//??????tileInfo()??
  53. ?//??????units()??
  54. ?//??
  55. ?//--------------------------------------------------------------------------??
  56. ???
  57. ???
  58. ?//----------------------------------??
  59. ?//??fullExtent??
  60. ?//??-?required?to?calculate?the?tiles?to?use??
  61. ?//----------------------------------??
  62. ???
  63. ?override?public?function?get?fullExtent():Extent??
  64. ?{??
  65. ??return?new?Extent(-180,?-90,?180,?90,?new?SpatialReference(4326));??
  66. ??//return?new?Extent(65.94,18.84,137.74,62.85,?new?SpatialReference(4326));??
  67. ?}??
  68. ???
  69. ?//----------------------------------??
  70. ?//??initialExtent??
  71. ?//??-?needed?if?Map?doesn't?have?an?extent??
  72. ?//----------------------------------??
  73. ???
  74. ?override?public?function?get?initialExtent():Extent??
  75. ?{??
  76. ??return?new?Extent(-124.731422,24.955967,-66.969849,?49.371735,new?SpatialReference(4326));??
  77. ??//return?new?Extent(112.48,47.77,112.60,47.97,?new?SpatialReference(4326));??
  78. ?}??
  79. ???
  80. ?//----------------------------------??
  81. ?//??spatialReference??
  82. ?//??-?needed?if?Map?doesn't?have?a?spatialReference??
  83. ?//----------------------------------??
  84. ???
  85. ?override?public?function?get?spatialReference():SpatialReference??
  86. ?{??
  87. ??return?new?SpatialReference(4326);??
  88. ?}??
  89. ???
  90. ?//----------------------------------??
  91. ?//??tileInfo??
  92. ?//----------------------------------??
  93. ???
  94. ?override?public?function?get?tileInfo():TileInfo??
  95. ?{?????
  96. ??return?_tileInfo;??
  97. ?}??
  98. ???
  99. ?//----------------------------------??
  100. ?//??units??
  101. ?//??-?needed?if?Map?doesn't?have?it?set??
  102. ?//----------------------------------??
  103. ???
  104. ?override?public?function?get?units():String??
  105. ?{??
  106. ??return?"esriDecimalDegrees";??
  107. ?}??
  108. ???
  109. ?//--------------------------------------------------------------------------??
  110. ?//??
  111. ?//??Overridden?methods??
  112. ?//??????getTileURL(level:Number,?row:Number,?col:Number):URLRequest??
  113. ?//??
  114. ?//--------------------------------------------------------------------------??
  115. ???
  116. ?override?protected?function?getTileURL(level:Number,?col:Number):URLRequest??
  117. ?{??
  118. ??var?url:String?;??
  119. ??url?=?_url??+?"&X="?+?col.toString()?+?"&Y="?+?row.toString()+?"&L="+?level.toString();??
  120. ??return?new?URLRequest(url)?;??
  121. ?}??
  122. ???
  123. ?//--------------------------------------------------------------------------??
  124. ?//??
  125. ?//??Private?Methods??
  126. ?//??
  127. ?//--------------------------------------------------------------------------??
  128. ???
  129. ?private?function?buildTileInfo():void??
  130. ?{??
  131. ??_tileInfo.height?=?256;??
  132. ??_tileInfo.width?=?256;??
  133. ??_tileInfo.origin?=?new?MapPoint(-180,?90);??
  134. ??_tileInfo.spatialReference?=?new?SpatialReference(4326);??
  135. ??_tileInfo.lods?=?[??????
  136. ???//new?LOD(0,?1.40625,?590995197.1416691),??
  137. ???new?LOD(1,?0.703125,?295497598.5708346),??
  138. ???new?LOD(2,?0.3515625,?147748799.2854173),??
  139. ???new?LOD(3,?0.17578125,?73874399.64270864),??
  140. ???new?LOD(4,?0.087890625,?36937199.82135432),??
  141. ???new?LOD(5,?0.0439453125,?18468599.91067716),??
  142. ???new?LOD(6,?0.02197265625,?9234299.95533858),??
  143. ?????
  144. ???new?LOD(7,?0.010986328125,?4617149.97766929),??
  145. ???new?LOD(8,?0.0054931640625,?2308574.98883465),??
  146. ???new?LOD(9,?0.00274658203124999,?1154287.49441732),??
  147. ???new?LOD(10,?0.001373291015625,?577143.747208662),??
  148. ???new?LOD(11,?0.0006866455078125,?288571.873604331),??
  149. ???new?LOD(12,?0.000343322753906249,?144285.936802165),??
  150. ???new?LOD(13,?0.000171661376953125,?72142.9684010827),??
  151. ???new?LOD(14,?0.0000858306884765626,?36071.4842005414),??
  152. ???new?LOD(15,?0.0000429153442382813,?18035.7421002707),??
  153. ???new?LOD(16,?0.0000214576721191406,?9017.87105013534),??
  154. ??];??
  155. ?}??
  156. ???
  157. ?private?function?padString(text:String,?size:int,?ch:String):String??
  158. ?{??
  159. ??while?(text.length?<?size)??
  160. ??{??
  161. ???text?=?ch?+?text;??
  162. ??}??
  163. ??return?text;??
  164. ?}??
  165. ?public?function?set?url(val:String):void??
  166. ?{??
  167. ??this._url?=?val;??
  168. ?}??
  169. }??
使用方法：
[plain] view plain copy print ?
  1. var?wmslayer:SXGeoTileLayer=new?SXGeoTileLayer();??
  2. wmslayer.url="?http://tile0.tianditu.com/DataServer?T=A0610_ImgAnno";??
  3. map.addLayer(wmslayer);??


二.调用Google地图服务
[plain] view plain copy print ?
  1. ??import?com.esri.ags.SpatialReference;??
  2. ??import?com.esri.ags.geometry.Extent;??
  3. ??import?com.esri.ags.geometry.MapPoint;??
  4. ??import?com.esri.ags.layers.TiledMapServiceLayer;??
  5. ??import?com.esri.ags.layers.supportClasses.*;??
  6. ?????
  7. ??import?flash.net.URLRequest;??
  8. ?????
  9. ??//扩展TiledMapServiceLayer图层实现加载google地图??
  10. ??public?class?GoogleMapLayer?extends?TiledMapServiceLayer??
  11. ??{??
  12. ??????private?var?_tileInfo:TileInfo=new?TileInfo();??
  13. ??????private?var?_baseURL:String="";??
  14. ?????????
  15. ??????public?function?GoogleMapLayer()??
  16. ??????{??
  17. ??????????super();??
  18. ??????????buildTileInfo();??
  19. ??????????setLoaded(true);??
  20. ??????}??
  21. ?????????
  22. ??????override?public?function?get?fullExtent():Extent??
  23. ??????{??
  24. ??????????return?new?Extent(-20037508.342787,?-20037508.342787,?20037508.342787,?new?SpatialReference(102113));??
  25. ??????}??
  26. ?????????
  27. ??????override?public?function?get?initialExtent():Extent??
  28. ??????{??
  29. ??????????return?new?Extent(-20037508.342787,?new?SpatialReference(102113));??
  30. ??????}??
  31. ?????????
  32. ??????override?public?function?get?spatialReference():SpatialReference??
  33. ??????{??
  34. ??????????return?new?SpatialReference(102113);??
  35. ??????}??
  36. ?????????
  37. ??????override?public?function?get?tileInfo():com.esri.ags.layers.supportClasses.TileInfo??
  38. ??????{??
  39. ??????????return?_tileInfo;??
  40. ??????}??
  41. ?????????
  42. ??????//获取矢量地图??
  43. ??????override?protected?function?getTileURL(level:Number,?col:Number):URLRequest??
  44. ??????{??
  45. ??????????var?url:String=_baseURL&+??
  46. ??????????????"x="?+?col?+?"&"?+??
  47. ??????????????"y="?+?row?+?"&"?+??
  48. ??????????????"z="?+?level+?"&s=";??
  49. ?????????????
  50. ??????????return?new?URLRequest(url);??
  51. ??????}??
  52. ??????public?function?set?url(val:String):void??
  53. ??
  54. this._baseURL?=?val;??
  55. ??
  56. ??????private?function?buildTileInfo():void??
  57. ??????{??
  58. ??????????_tileInfo.height=256;??
  59. ??????????_tileInfo.width=256;??
  60. ??????????_tileInfo.origin=new?MapPoint(-20037508.342787,?20037508.342787);??
  61. ??????????_tileInfo.spatialReference=new?SpatialReference(102113);??
  62. ??????????_tileInfo.lods?=?[??
  63. ??????????????new?LOD(0,?156543.033928,?591657527.591555),??
  64. ??????????????new?LOD(1,?78271.5169639999,?295828763.795777),??
  65. ??????????????new?LOD(2,?39135.7584820001,?147914381.897889),??
  66. ??????????????new?LOD(3,?19567.8792409999,?73957190.948944),??
  67. ??????????????new?LOD(4,?9783.93962049996,?36978595.474472),??
  68. ??????????????new?LOD(5,?4891.96981024998,?18489297.737236),??
  69. ??????????????new?LOD(6,?2445.98490512499,?9244648.868618),??
  70. ??????????????new?LOD(7,?1222.99245256249,?4622324.434309),??
  71. ??????????????new?LOD(8,?611.49622628138,?2311162.217155),??
  72. ??????????????new?LOD(9,?305.748113140558,?1155581.108577),??
  73. ??????????????new?LOD(10,?152.874056570411,?577790.554289),??
  74. ??????????????new?LOD(11,?76.4370282850732,?288895.277144),??
  75. ??????????????new?LOD(12,?38.2185141425366,?144447.638572),??
  76. ??????????????new?LOD(13,?19.1092570712683,?72223.819286),??
  77. ??????????????new?LOD(14,?9.55462853563415,?36111.909643),??
  78. ??????????????new?LOD(15,?4.77731426794937,?18055.954822),??
  79. ??????????????new?LOD(16,?2.38865713397468,?9027.977411),??
  80. ??????????????new?LOD(17,?1.19432856685505,?4513.988705),??
  81. ??????????????new?LOD(18,?0.597164283559817,?2256.994353),??
  82. ??????????????new?LOD(19,?0.298582141647617,?1128.497176)??
  83. ??????????];??
  84. ??????}??
  85. ??}??

使用方法：

[plain] view plain copy print ?
  1. var?wmslayer:GoogleMapLayer?=new?GoogleMapLayer();??
  2. wmslayer.url="http://khm2.google.com/kh/v=38&hl=zh-CN";??
  3. map.addLayer(wmslayer);?

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