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  • ArcGIS For Flex学习之Mapping---Switching Basemaps

    今天开始系统的学习ArcGIS For Flex,先从ESRI的例子学起

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
     3                xmlns:s="library://ns.adobe.com/flex/spark"
     4                xmlns:esri="http://www.esri.com/2008/ags"
     5                pageTitle="Toggle between Map Services">
     6     <!--
     7     Description:
     8     This sample demonstrates how to allow users to change
     9     between different basemaps.  There are different ways
    10     to visually accomplish this behavior, this is just one example.
    11 
    12     It also ensures that the levels of detail (LOD) are updated based on which basemap is selected.
    13     If all base maps have the same LODs, you wouldn't need the layerShowHandler function.
    14 
    15     Documentation:
    16     For more information, see the API documentation.
    17     http://resources.arcgis.com/en/help/flex-api/apiref/com/esri/ags/geometry/MapPoint.html
    18     http://resources.arcgis.com/en/help/flex-api/apiref/com/esri/ags/layers/TiledMapServiceLayer.html
    19     http://resources.arcgis.com/en/help/flex-api/apiref/com/esri/ags/layers/TiledMapServiceLayer.html#tileInfo
    20     http://resources.arcgis.com/en/help/flex-api/apiref/com/esri/ags/layers/supportClasses/TileInfo.html
    21     http://resources.arcgis.com/en/help/flex-api/apiref/com/esri/ags/layers/supportClasses/LOD.html
    22 
    23     http://resources.arcgis.com/en/help/flex-api/concepts/index.html#/Types_of_layers/017p00000027000000/
    24 
    25     ArcGIS REST API documentation:
    26     http://resources.arcgis.com/en/help/rest/apiref/mapserver.html
    27     http://resources.arcgis.com/en/help/rest/apiref/tile.html
    28 
    29     ArcGIS for Server documentation:
    30     http://resources.arcgis.com/en/help/main/10.1/#/What_is_a_map_service/0154000002m7000000/
    31     http://resources.arcgis.com/en/help/main/10.1/#/What_is_map_caching/01540000048q000000/
    32     -->
    33 
    34     <fx:Script>
    35         <![CDATA[
    36             import com.esri.ags.geometry.MapPoint;
    37             import com.esri.ags.layers.TiledMapServiceLayer;
    38 
    39             import mx.events.FlexEvent;
    40 
    41             private function layerShowHandler(event:FlexEvent):void
    42             {
    43                 // update the LODs/zoomslider to use/show the levels for the selected base map
    44                 var tiledLayer:TiledMapServiceLayer = event.target as TiledMapServiceLayer;
    45                 myMap.lods = tiledLayer.tileInfo.lods;
    46             }
    47         ]]>
    48     </fx:Script>
    49 
    50     <s:controlBarContent>
    51         <s:RichText width="100%">
    52             This sample demonstrates how to allow users to change
    53             between different basemaps.  There are different ways
    54             to visually accomplish this behavior, this is just one example.
    55             Click the different buttons on the bar below to switch basemaps.
    56         </s:RichText>
    57     </s:controlBarContent>
    58 
    59     <esri:Map id="myMap"
    60               level="4"
    61               load="myMap.centerAt(new MapPoint(-11713000, 4822000))">
    62         <esri:ArcGISTiledMapServiceLayer show="layerShowHandler(event)"
    63                                          url="http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"
    64                                          visible="{bb.selectedIndex == 0}"/>
    65         <esri:ArcGISTiledMapServiceLayer show="layerShowHandler(event)"
    66                                          url="http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"
    67                                          visible="{bb.selectedIndex == 1}"/>
    68         <esri:ArcGISTiledMapServiceLayer show="layerShowHandler(event)"
    69                                          url="http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer"
    70                                          visible="{bb.selectedIndex == 2}"/>
    71         <esri:ArcGISTiledMapServiceLayer show="layerShowHandler(event)"
    72                                          url="http://server.arcgisonline.com/ArcGIS/rest/services/Ocean_Basemap/MapServer"
    73                                          visible="{bb.selectedIndex == 3}"/>
    74         <esri:ArcGISTiledMapServiceLayer show="layerShowHandler(event)"
    75                                          url="http://server.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer"
    76                                          visible="{bb.selectedIndex == 4}"/>
    77     </esri:Map>
    78     <s:ButtonBar id="bb"
    79                  right="5" top="5"
    80                  requireSelection="true">
    81         <s:dataProvider>
    82             <s:ArrayList>
    83                 <fx:String>Streets</fx:String>
    84                 <fx:String>Topographic</fx:String>
    85                 <fx:String>Imagery</fx:String>
    86                 <fx:String>Oceans</fx:String>
    87                 <fx:String>National Geographic</fx:String>
    88             </s:ArrayList>
    89         </s:dataProvider>
    90     </s:ButtonBar>
    91 </s:Application>

    转载地址:https://developers.arcgis.com/flex/sample-code/switching-basemaps.htm

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  • 原文地址:https://www.cnblogs.com/wicked-fly/p/4040206.html
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