GDAL读取Shapefile

系统管理员 2021-11-02 00:14 373阅读 0赞

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#include <gdal_priv.h>
    #include <ogrsf_frmts.h>
    
    GDALAllRegister();
    OGRDataSource* poDS;
    const char* pszDriverName = "ESRI Shapefile";
    //
    GDALDriverManager* pDriverManager = GetGDALDriverManager(); //new GDALDriverManager();
    GDALDriver* pDriver = pDriverManager->GetDriverByName(pszDriverName);
    if (pDriver == nullptr)
    {
      qDebug() << pszDriverName << " driver not available.";            
      return;
    }
    //
    const char* filePathChar1 = "D:\\data";
    OGRSFDriver* pSFDriver = static_cast<OGRSFDriver*>(pDriver);
    OGRDataSource* pDataSource = pSFDriver->Open(filePathChar, FALSE);
    
    /*
    OGRSFDriverRegistrar* pDriverRegistrar = OGRSFDriverRegistrar::GetRegistrar();
    OGRSFDriver* pSFDriver = (OGRSFDriver*)pDriverRegistrar->GetDriverByName(pszDriverName);
    OGRDataSource* pDataSource = pSFDriver->Open(filePathChar, FALSE);
    */
    
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    OGRLayer* pLayer = pDataSource->GetLayerByName(baseNameChar);
    /*const char* geometryColumnName = pLayer->GetGeometryColumn();
    int fieldIndex = pLayer->FindFieldIndex(geometryColumnName, TRUE);*/
    // pEnvelopeDisplay
    if (pLayerList.size() == 0) {
      OGREnvelope* pEnvelope = new OGREnvelope();
      pLayer->GetExtent(pEnvelope, TRUE);
      double centerX = (pEnvelope->MinX + pEnvelope->MaxX) / 2;
      double centerY = (pEnvelope->MinY + pEnvelope->MaxY) / 2;
      double distanceX = pEnvelope->MaxX - pEnvelope->MinX;
      double distanceY = pEnvelope->MaxY - pEnvelope->MinY;
      //
    }

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转载于:https://www.cnblogs.com/gispathfinder/p/10890185.html