package com.lf.server.service.data;
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import com.lf.server.helper.StringHelper;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.gdal.gdal.Dataset;
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import org.gdal.gdal.gdal;
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import org.gdal.gdalconst.gdalconst;
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import org.springframework.stereotype.Service;
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import java.io.File;
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/**
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* 栅格服务
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* @author WWW
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* @date 2023-08-27
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*/
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@Service
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public class RasterService {
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private final static Log log = LogFactory.getLog(RasterService.class);
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/**
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* 获取栅格数据的EPSG编码
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*/
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public Integer getRaterEpsg(String file) {
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Dataset ds = null;
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try {
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File f = new File(file);
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if (!f.exists() || f.isDirectory()) {
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return null;
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}
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ds = gdal.Open(file, gdalconst.GA_ReadOnly);
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if (null == ds || 0 == ds.getRasterCount()) {
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return null;
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}
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if (null == ds.GetSpatialRef()) {
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return null;
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}
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// PROJCS、 GEOGCS、GEOGCS 或 NULL
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String code = ds.GetSpatialRef().GetAuthorityCode(null);
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if (StringHelper.isEmpty(code)) {
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return null;
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}
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return Integer.parseInt(code);
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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return null;
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} finally {
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if (null != ds) {
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ds.delete();
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}
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}
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}
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}
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