mongodb如何导入shapefile数据?
两种解决方案:
一、将整个shapefile转为GeoJSON然后直接导入mongoDB数据库中
首先,将shapefile数据转为WGS84地理坐标,然后使用GDAL的命令行工具ogr2ogr进行格式的转换,转换命令如下:
ogr2ogr -f geoJSON continents.json continents.shp
删除生成JSON文件的前两行{ "type": "FeatureCollection",和最后一行}。
最后,使用mongodb的mongoimport工具进行导入:
mongoimport --db world --collection continents < continents.json
这样子整个shapefile文件在mongodb中是以一个document存在的。
二、更加细粒度的存储方法是将shapefile中的每个feature取出来转为GeoJSON存入mongodb
具体实现代码入下(Java版本):
package cn.tzy.mongodb; import java.io.File; import java.io.IOException; import java.io.StringWriter; import org.bson.Document; import org.geotools.data.FileDataStore; import org.geotools.data.FileDataStoreFinder; import org.geotools.data.simple.SimpleFeatureIterator; import org.geotools.data.simple.SimpleFeatureSource; import org.geotools.geojson.feature.FeatureJSON; import org.opengis.feature.simple.SimpleFeature; import com.mongodb.MongoClient; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; public class MongoEx { public static void main(String[] args) throws IOException { final String IP_ADDRESS = "127.0.0.1"; final String DB_NAME = "SpatialFeatures"; final String COLLECTION_NAME = "continents"; final String SHAPE_FILE = "/home/theone/Data/World/continent.shp"; MongoClient client = new MongoClient(IP_ADDRESS, 27017); MongoDatabase db = client.getDatabase(DB_NAME); db.createCollection(COLLECTION_NAME); MongoCollection<Document> coll = db.getCollection(COLLECTION_NAME); File shapeFile = new File(SHAPE_FILE); FileDataStore store = FileDataStoreFinder.getDataStore(shapeFile); SimpleFeatureSource sfSource = store.getFeatureSource(); SimpleFeatureIterator sfIter = sfSource.getFeatures().features(); // 依次取出每一个Feature转为GeoJSON格式,然后插入到collection中 while (sfIter.hasNext()) { SimpleFeature feature = (SimpleFeature) sfIter.next(); FeatureJSON fjson = new FeatureJSON(); StringWriter writer = new StringWriter(); fjson.writeFeature(feature, writer); String sjson = writer.toString(); Document doc = Document.parse(sjson); coll.insertOne(doc); } client.close(); } }
来源:PY学习网:原文地址:https://www.py.cn/article.html