FileGDB代码示例
1. 读取FileGDB图层
1.1 实现思路
graph TDA[注册OGR] --> B[设置中文路径支持]B --> C[打开数据驱动]C --> D[打开数据源]D --> G[获取图层]G --> H[读取图层信息]
1.2 代码示例
public Layer readGdbLayer(String driverName,String gdbPath,String layerName) {ogr.RegisterAll();gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");Driver driver = ogr.GetDriverByName(driverName);DataSource dataSource = driver.Open(gdbPath, 1);Layer layer = dataSource.GetLayerByName(layerName);for (int i = 0; i < layer.GetLayerDefn().GetFieldCount(); i++) {System.out.println(layer.GetLayerDefn().GetFieldDefn(i).GetName());}Feature feature = layer.GetNextFeature();while (feature != null) {for (int i = 0; i < feature.GetFieldCount(); i++) {System.out.println(feature.GetFieldDefnRef(i).GetName());System.out.println(feature.GetFieldAsString(i));}System.out.println(feature.GetGeometryRef().ExportToWkt());feature = layer.GetNextFeature();}return layer;}2. 写入FileGDB图层
2.1 实现思路
graph TDA[注册OGR] --> B[设置中文路径支持]B --> C[打开数据驱动]C --> D[打开数据源或创建数据源]D --> G[获取图层或者创建图层]G --> H[向图层插入数据]H --> I[关闭数据源]
2.2 代码示例
public void writeGdbLayer(String driverName,String gdbPath,String featureDataset,String layerName,int wkid,String wkt) {ogr.RegisterAll();gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");Vector options = null;if (CharSequenceUtil.isNotBlank(featureDataset)) {options = new Vector();options.add("FEATURE_DATASET=" + featureDataset);}Driver driver = ogr.GetDriverByName(driverName);DataSource dataSource = driver.Open(gdbPath, 1);if (dataSource == null) {dataSource = driver.CreateDataSource(gdbPath);}Layer layer = dataSource.GetLayerByName(layerName);if (layer == null) {SpatialReference sr = new SpatialReference();sr.ImportFromEPSG(wkid);layer = dataSource.CreateLayer(layerName, sr,6, options);}FieldDefn fieldDefn = new FieldDefn("TEST", 4);layer.CreateField(fieldDefn);Feature feature = new Feature(layer.GetLayerDefn());feature.SetGeometry(ogr.CreateGeometryFromWkt(wkt));feature.SetField("TEST", "test");layer.CreateFeature(feature);dataSource.delete();}3. 读取FileGDB数据集
3.1 实现思路
graph TDA[配置GDAL环境] --> B[执行GDAL命令]B --> C[解析返回信息]C --> D[读取数据集信息]
3.2 代码示例
public void readGdbDs(String gisPath){SystemPropsUtil.set("GDAL_FILENAME_IS_UTF8", "YES");SystemPropsUtil.set("SHAPE_ENCODING", "UTF-8");String output = RuntimeUtil.execForStr(StandardCharsets.UTF_8, "ogrinfo", "-json", gisPath);String jout = null;if (!JSONUtil.isTypeJSONObject(output)) {jout = output.substring(output.indexOf("{"));}if (!JSONUtil.isTypeJSONObject(jout)) {jout = output.substring(output.indexOf("{"), output.lastIndexOf("}") + 1);}JSONObject jsonObject = JSON.parseObject(jout);String rootGroup = jsonObject.getString("rootGroup");System.out.println(rootGroup);}
