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13693261870

2024-09-18 0cbb814f8c00469034fc98fbd5bb71fbd3bf8dd1

 src/main/java/com/se/simu/helper/GdalHelper.java

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package com.se.simu.helper;

import lombok.extern.slf4j.Slf4j;
import org.gdal.gdal.Band;
import org.gdal.gdal.Dataset;
import org.gdal.gdal.gdal;
import org.gdal.gdalconst.gdalconst;
import org.gdal.ogr.DataSource;
import org.gdal.ogr.Driver;
import org.gdal.ogr.Layer;
import org.gdal.ogr.ogr;
import org.gdal.osr.SpatialReference;
import org.gdal.osr.osr;

import java.io.File;

/**
 * GDAL帮助类
 *
 * @author WWW
 * @date 2024-09-12
 */
@Slf4j
@SuppressWarnings("ALL")
public class GdalHelper {
    public final static int I4326 = 4326;

    public final static int I4490 = 4490;

    public static SpatialReference SR4326;

    public static SpatialReference SR4490;

    public final static String CGCS2000 = "CGCS2000";

    /**
     * åˆå§‹åŒ–
     */
    public static void init(String gdalPath) {
        // é…ç½®çŽ¯å¢ƒå˜é‡
        if (!StringHelper.isEmpty(gdalPath)) {
            if (WebHelper.isWin()) {
                gdal.SetConfigOption("GDAL_DATA", gdalPath + "/gdal-data");
                gdal.SetConfigOption("PROJ_LIB", gdalPath + "/proj7/share");
                //System.setProperty("PROJ_LIB", gdalPath + "/proj7/share")
                gdal.SetConfigOption("GDAL_DRIVER_PATH", gdalPath + "/gdalplugins");

                String path = System.getenv("PATH");
                if (!path.contains(gdalPath)) {
                    System.setProperty("PATH", path + ";" + gdalPath);
                }
            } else {
                //System.setProperty("java.library.path", gdalPath);
            }
        }

        // æ”¯æŒä¸­æ–‡è·¯å¾„
        gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");
        // å±žæ€§è¡¨æ”¯æŒä¸­æ–‡ï¼šCP936
        gdal.SetConfigOption("SHAPE_ENCODING", "");
        gdal.SetConfigOption("PGEO_DRIVER_TEMPLATE", "DRIVER=Microsoft Access Driver (*.mdb, *.accdb);DBQ=%s");
        gdal.SetConfigOption("MDB_DRIVER_TEMPLATE", "DRIVER=Microsoft Access Driver (*.mdb, *.accdb);DBQ=%s");

        // æ³¨å†Œæ‰€æœ‰çš„驱动
        gdal.AllRegister();
        ogr.RegisterAll();
        initSr();
    }

    /**
     * åˆå§‹åŒ–坐标系
     * <p>
     * https://blog.csdn.net/CallmeAdo/article/details/127558139
     */
    public static void initSr() {
        try {
            SR4326 = new SpatialReference();
            SR4326.ImportFromEPSG(I4326);
            // å¯¹äºŽlat/long顺序的地理CRS，数据仍然是long/lat顺序的
            SR4326.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);

            SR4490 = new SpatialReference();
            SR4490.ImportFromEPSG(I4490);
            SR4490.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }

    /**
     * åˆ›å»ºé‡‘å­—å¡”
     */
    public static void createPyramid(String file) {
        Dataset ds = null;
        try {
            File f = new File(file);
            if (!f.exists() || f.isDirectory()) {
                return;
            }

            ds = gdal.Open(file, gdalconst.GA_ReadOnly);
            if (null == ds || ds.getRasterCount() < 1 || null == ds.GetSpatialRef()) {
                return;
            }

            // åˆ›å»ºé‡‘å­—å¡”
            Band band = ds.GetRasterBand(1);
            if (0 == band.GetOverviewCount()) {
                ds.BuildOverviews("nearest", new int[]{2, 4, 6, 8, 16}, null);
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        } finally {
            if (null != ds) {
                ds.delete();
            }
        }
    }

    /**
     * é”€æ¯èµ„源
     */
    public static void delete(Layer layer, DataSource dataSource, Driver driver) {
        try {
            if (null != layer) {
                layer.delete();
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
        try {
            if (null != dataSource) {
                dataSource.delete();
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
        try {
            if (null != driver) {
                driver.delete();
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }
}