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作者:xinxin
在SuperMap产品中,数据源可以分为文件型数据源、数据库型数据源和在线数据源,SuperMap iMobile for Android可以对接文件型数据源和在线数据源,文件型数据源目前主要支持UDB格式,这个是加载本地数据,比较简单,不作过多介绍。在线数据源也分很多种,比如有SuperMap iServer发布的rest、wmts、wms服务和天地图服务等。下面将分享iMobile for android对接各种常用在线数据。
1) Rest地图服务
Iserver服务器发布rest地图服务后,使用iMobile for android来对接,关键代码如下:String url = "http://supermap.com.cn:8090/iserver/services/map-changchun/rest/maps/%E9%95%BF%E6%98%A5%E5%B8%82%E5%8C%BA%E5%9B%BE";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.Rest);info.setAlias("iserver_rest");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
2) OGC服务
(1) 打开wmts服务,关键代码如下:String url = "http://supermap.com.cn:8090/iserver/services/map-china400/wmts-china";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OGC);info.setDriver("WMTS");info.setAlias("iserver_wmts");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
(2) 打开wms服务,关键代码如下:
方法一:String url = "http://supermap.com.cn:8090/iserver/services/map-world/wms130/World";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OGC);info.setDriver("WMS");info.setAlias("iserver_wms");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
方法二:
DatasourceConnectionInfo info03 = new DatasourceConnectionInfo();info03.setAlias("gkdm");// 设置地图服务地址()info03.setServer("http://support.supermap.com.cn:8090/iserver/services/map-china400/wms130/China");// 设置引擎类型info03.setEngineType(EngineType.OGC);// 设置驱动名称info03.setDriver("WMS");// 设置WMS服务的版本号info03.setWebVersion("1.3.0");info03.setWebVisibleLayers("0");info03.setWebCoordinate("EPSG:3857");info03.setWebFormat("image/png");Rectangle2D rect01 = new Rectangle2D(-2.0037508342789248E7, -2.003750834278914E7, 2.0037508342789244E7, 2.0037508342789087E7);info03.setWebBBox(rect01);info03.setWebExtendParam("");Datasource datasource2 = workspace.getDatasources().open(info03);if (datasource2==null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
(3) 打开wfs服务,关键代码如下:
String url = "http://support.supermap.com.cn:8090/iserver/services/data-world/wfs100/utf-8";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OGC);info.setDriver("WFS");info.setAlias("iserver_wfs");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
(4) 打开wcs服务,关键代码如下:
String url = "http://support.supermap.com.cn:8090/iserver/services/data-jingjin/wcs111";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OGC);info.setDriver("WCS");info.setAlias("iserver_wcs");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
超图云是由超图公司发布的一个在线服务,打开超图云的关键代码:
String url = "http://t2.supermapcloud.com/";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.SuperMapCloud);info.setAlias("supermapcloud");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
天地图其实是标准的OGC服务,主要有wmts服务和wms服务,目前打开天地图前需要需要到天地图官网申请一个移动的key值。
1) 打开wmts服务 (1) 经纬度服务String url = "http://t0.tianditu.gov.cn/img_c/wmts?tk=855df38010df4353447beb0c0808d9a6";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OGC);info.setDriver("WMTS");info.setAlias("tianditu_wmts");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
(2) 平面投影服务
String url = "http://t0.tianditu.gov.cn/img_w/wmts?dpi=96&tk=855df38010df4353447beb0c0808d9a6&topleftcornerexchange=1";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OGC);info.setDriver("WMTS");info.setAlias("tianditu_wmts");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
2)打开wms服务
与打开wmts服务类似,只需将info.setDriver(“WMTS”)换成info.setDriver(“WMS”),这里不再赘述。 备注:打开天地图的平面投影坐标系还需要带一个topleftcornerexchange参数,保证数据加载到地图能正常渲染显示;其中dpi=96参数是解决和其它数据叠加偏移问题。关键代码如下:
String url = "http://map.baidu.com";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.BaiDu);info.setAlias("baidu");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
关键代码如下:
String url = "http://www.google.cn/maps";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.GoogleMaps);info.setAlias("googlemaps");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
关键代码如下:
String url = "http://openstreetmap.org";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.OpenStreetMaps);info.setAlias("openstreetmaps");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
关键代码如下:
String url = "http://cn.bing.com/maps";Workspace workspace = new Workspace();DatasourceConnectionInfo info = new DatasourceConnectionInfo();info.setServer(url);info.setEngineType(EngineType.BingMaps);info.setAlias("bingmaps");Datasource datasource = workspace.getDatasources().open(info);if (datasource == null){ Toast.makeText(this,"数据源打开失败",Toast.LENGTH_SHORT).show(); return;}
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