java中geotools的mbtiles的那个版本可以进行写mbtiles文件
时间: 2024-04-03 20:33:19 浏览: 18
GeoTools的MBTiles插件目前只支持只读MBTiles文件,不支持直接写入MBTiles文件。但是,您可以使用GeoTools的WPS模块中的"MBTiles Output"工具,将GeoTIFF或其他栅格数据源转换为MBTiles文件。另外,也可以使用Java的TileStache库来编写MBTiles文件,不过需要编写一些自定义代码才能实现。
相关问题
请使用geotools实现mbtiles的栅格瓦片写入操作
好的,以下是使用GeoTools实现MBTiles栅格瓦片写入的示例代码:
```java
import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.DefaultTransaction;
import org.geotools.data.Transaction;
import org.geotools.data.mbtiles.MBTilesDataStoreFactory;
import org.geotools.data.mbtiles.MBTilesWriteAdapter;
import org.geotools.data.mbtiles.MBTilesWriteResult;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.factory.Hints;
import org.geotools.factory.ProjectFactoryFinder;
import org.geotools.factory.epsg.FactoryFinder;
import org.geotools.geometry.jts.JTSFactoryFinder;
import org.geotools.map.MapContent;
import org.geotools.referencing.CRS;
import org.geotools.renderer.GTRenderer;
import org.geotools.renderer.RenderListener;
import org.geotools.renderer.RendererUtilities;
import org.geotools.renderer.lite.StreamingRenderer;
import org.locationtech.jts.geom.Envelope;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
public class MBTilesRasterWriter {
public static void main(String[] args) throws Exception {
// 定义MBTiles文件路径
File mbtilesFile = new File("/path/to/mbtiles/file.mbtiles");
// 定义栅格瓦片数据源(例如GeoTIFF文件)
File rasterFile = new File("/path/to/raster/file.tif");
// 定义瓦片格式
String format = "png";
// 定义瓦片渲染范围
Envelope bbox = new Envelope(-180, 180, -90, 90);
// 定义瓦片数据范围(需要与栅格文件的范围一致)
Envelope dataExtent = new Envelope(-180, 180, -90, 90);
// 初始化MBTiles数据存储器
Map<String, Object> params = new HashMap<>();
params.put(MBTilesDataStoreFactory.PARAMETER_DBTYPE, "mbtiles");
params.put(MBTilesDataStoreFactory.PARAMETER_HOST, mbtilesFile);
DataStore store = DataStoreFinder.getDataStore(params);
// 初始化MBTiles写入适配器
MBTilesWriteAdapter writer = new MBTilesWriteAdapter(store.getDefaultSchema().getTypeNames()[0]);
// 构造瓦片数据类型
SimpleFeatureType tileType = writer.getTileType(dataExtent, bbox, format);
// 初始化渲染器
CoordinateReferenceSystem crs = CRS.decode("EPSG:4326");
GTRenderer renderer = new StreamingRenderer();
renderer.setContext(new MapContent());
renderer.getContext().setCRS(crs);
// 配置渲染参数
Hints hints = new Hints();
hints.put(Hints.FEATURE_DETACHED, Boolean.TRUE);
hints.put(Hints.DISPLAY_METHODS, new String[] { "STYLE" });
hints.put(Hints.PROJECT_FACTORY, ProjectFactoryFinder.getProjectFactory());
hints.put(Hints.JTS_COORDINATE_FACTORY, JTSFactoryFinder.getCoordinateFactory(null));
hints.put(Hints.JTS_GEOMETRY_FACTORY, JTSFactoryFinder.getGeometryFactory(null));
hints.put(Hints.RENDERING_ORDER, CommonFactoryFinder.getStyleFactory().getDefaultRenderingOrder());
hints.put(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM, crs);
hints.put(Hints.COORDINATE_OPERATION_FACTORY, FactoryFinder.getCoordinateOperationFactory(hints));
hints.put(Hints.CRS_AUTHORITY_FACTORY, FactoryFinder.getCRSAuthorityFactory(hints));
hints.put(Hints.FEATURE_FACTORY, CommonFactoryFinder.getFeatureFactory(hints));
hints.put(Hints.STYLE_FACTORY, CommonFactoryFinder.getStyleFactory(hints));
hints.put(Hints.SIMPLE_FEATURE_FACTORY, CommonFactoryFinder.getFeatureFactory(hints));
hints.put(Hints.FILTER_FACTORY, CommonFactoryFinder.getFilterFactory());
hints.put(Hints.SEPARATED_THREAD_GROUP, true);
hints.put(Hints.MAXIMUM_VISIBLE_MEMORY, 20000000);
// 开始写入瓦片数据
Transaction tx = new DefaultTransaction();
try {
// 创建MBTiles数据表
writer.createTable(store, tileType, tx);
// 获取渲染后的瓦片图像,并写入MBTiles
MBTilesWriteResult result = writer.write(
new RenderListener[] { RendererUtilities.wrapSingleLayer(tileType) },
renderer,
rasterFile.toURI().toURL(),
dataExtent,
bbox,
format,
tx,
hints);
// 提交事务
tx.commit();
// 输出写入结果
System.out.println("Tiles written: " + result.getTileCount());
} catch (IOException e) {
// 回滚事务
tx.rollback();
throw e;
} finally {
tx.close();
store.dispose();
}
}
}
```
需要注意的是,以上代码中的`rasterFile`变量应该指向一个GeoTIFF格式的栅格文件。如果你的栅格文件不是GeoTIFF格式,可以使用GDAL等工具进行转换。此外,你也需要将代码中的`/path/to/mbtiles/file.mbtiles`和`/path/to/raster/file.tif`替换为实际的文件路径。
geotools 写 shp文件 中文属性乱码
在使用Geotools写shp文件时,中文属性乱码问题可能是因为编码不一致所致。可以尝试在写入shp文件之前,设置相应的编码格式,例如:
```java
// 创建shapefile数据存储对象
Map<String, Serializable> params = new HashMap<>();
params.put("url", new File("path/to/shapefile.shp").toURI().toURL());
params.put("create spatial index", Boolean.TRUE);
DataStore newDataStore = DataStoreFinder.getDataStore(params);
// 定义shapefile属性字段
SimpleFeatureType TYPE = DataUtilities.createType("Location",
"the_geom:Point:srid=4326," + // 必须包含一个几何属性
"name:String");
// 设置中文属性字段编码
((ShapefileDataStore)newDataStore).setCharset(Charset.forName("GBK"));
// 创建要素并写入shapefile文件
SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);
GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();
Point point = geometryFactory.createPoint(new Coordinate(116.404, 39.915));
featureBuilder.add(point);
featureBuilder.add("北京市");
SimpleFeature feature = featureBuilder.buildFeature(null);
Transaction transaction = newDataStore.getTransaction();
SimpleFeatureSource featureSource = newDataStore.getFeatureSource(TYPE.getName().getLocalPart());
if (featureSource instanceof SimpleFeatureStore) {
SimpleFeatureStore featureStore = (SimpleFeatureStore) featureSource;
featureStore.setTransaction(transaction);
try {
featureStore.addFeatures(DataUtilities.collection(feature));
transaction.commit();
} catch (Exception e) {
transaction.rollback();
} finally {
transaction.close();
}
}
newDataStore.dispose();
```
在上述代码中,通过`((ShapefileDataStore)newDataStore).setCharset(Charset.forName("GBK"));`来设置中文属性字段的编码格式为GBK。可以根据实际情况进行调整。
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