gis利器之Gdal（三）gdb数据读取

// 读取数据，这里以gdb文件为例StringstrDriverName="OpenFileGDB";
// 创建一个文件，根据strDriverName扩展名自动判断驱动类型org.gdal.ogr.DriveroDriver=ogr.GetDriverByName(strDriverName);
其它的信息跟读取shp文件是一样的。详细代码如下所示：@TestpublicvoidtestReadGdb() {
// 指定文件的名字和路径StringgdbFile="F:\\vector_data\\other\\中国行政区划数据.gdb\\中国行政区划数据.gdb";
// 注册所有的驱动ogr.RegisterAll();
// 为了支持中文路径，请添加下面这句代码gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");
// 为了使属性表字段支持中文，请添加下面这句gdal.SetConfigOption("SHAPE_ENCODING", "CP936");
// 读取数据，这里以gdb文件为例StringstrDriverName="OpenFileGDB";
// 创建一个文件，根据strDriverName扩展名自动判断驱动类型org.gdal.ogr.DriveroDriver=ogr.GetDriverByName(strDriverName);
if (oDriver==null) {
System.out.println(strDriverName+" 驱动不可用！\n");
return;
    }
DataSourcedataSource=oDriver.Open(gdbFile, 0);
for(inti=0;i<dataSource.GetLayerCount();i++) {
LayerlayerIdx=dataSource.GetLayer(i);
System.out.println("图层名称：<==>"+layerIdx.GetName());
    }
Layerlayer=dataSource.GetLayer("分省");
StringlayerName=layer.GetName();
System.out.println("图层名称："+layerName);
SpatialReferencespatialReference=layer.GetSpatialRef();
//System.out.println(spatialReference);System.out.println("空间参考坐标系："+spatialReference.GetAttrValue("AUTHORITY", 0)
+spatialReference.GetAttrValue("AUTHORITY", 1));
double[] layerExtent=layer.GetExtent();
System.out.println("图层范围：minx:"+layerExtent[0] +",maxx:"+layerExtent[1] +",miny:"+layerExtent[2]
+",maxy:"+layerExtent[3]);
FeatureDefnfeatureDefn=layer.GetLayerDefn();
intfieldCount=featureDefn.GetFieldCount();
Map<String,String>fieldMap=newHashMap<String,String>();
for (inti=0; i<fieldCount; i++) {
FieldDefnfieldDefn=featureDefn.GetFieldDefn(i);
// 得到属性字段类型intfieldType=fieldDefn.GetFieldType();
StringfieldTypeName=fieldDefn.GetFieldTypeName(fieldType);
// 得到属性字段名称StringfieldName=fieldDefn.GetName();
fieldMap.put(fieldTypeName, fieldName);
    }
System.out.println(fieldMap);
longfeatureCount=layer.GetFeatureCount();
System.out.println("图层要素个数："+featureCount);
Featurefeature2=null;
while((feature2=layer.GetNextFeature()) !=null) {
//System.out.println(feature2.GetGeometryRef().ExportToJson());System.out.println(feature2.GetFieldAsString("Shape_Area") +"\t"+feature2.GetFieldAsString("省区"));
  }
oDriver.delete();
gdal.GDALDestroyDriverManager();
}