geotools数据简化

    <dependency>
        <groupId>org.geotools</groupId>
        <artifactId>gt-main</artifactId>
        <version>${geotools.version}</version>
    </dependency>

    /**
     * FeatureCollection简化
     * 
     * @param featureCollection
     * @param tolerance   容差
     * @return
     * @throws Exception
     */
    public static SimpleFeatureCollection simplifyFeatureCollection(SimpleFeatureCollection featureCollection,
            double tolerance) throws Exception {
        DefaultFeatureCollection simplifiedCollection = new DefaultFeatureCollection();

        SimpleFeatureIterator iterator = featureCollection.features();
        while (iterator.hasNext()) {
            SimpleFeature feature = iterator.next();
            Geometry geometry = (Geometry) feature.getDefaultGeometry();
            // 使用Douglas-Peucker算法简化几何形状
            Geometry simplifiedGeometry = DouglasPeuckerSimplifier.simplify(geometry, tolerance);
            // 使用简化后的几何形状
            feature.setDefaultGeometry(simplifiedGeometry);
            simplifiedCollection.add(feature);
        }
        iterator.close();
        return simplifiedCollection;
    }