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();
}
}
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