Vfrdtyky

I try using CreateCopy(), it seem in thrown me an exception when i run the program

Unhandled exception at 0x000007FEDF2C9120 (gdal202.dll) in GdalTest.exe: 0xC0000005: Access violation reading location 0x0000000000000058.

enter image description here

It will display this output on the console:

enter image description here

I try debug on the exception occurs, on the call stack it will go to the new tab then display no symbol loaded

enter image description here

I hope someone can explain to me what file not be loaded and if the console can view raster map it is will throw an error or exception ?
Below is my code if someone want to copy and make reference it just i have issues on "Using CreateCopy()" part.

Thank you and best regards,

// GdalTest.cpp : Defines the entry point for the console application.

//







#include "cpl_conv.h" // for CPLMalloc()

#include "stdafx.h"

#include "gdal.h"

#include <stdlib.h>

#include <stdio.h>

#include "iostream"

#include "cpl_string.h"

#include "gdal_priv.h"









class GDALMajorObject;

class GDALDataset;

class GDALRasterBand;

class GDALDriver;

class GDALRasterAttributeTable;

class GDALProxyDataset;

class GDALProxyRasterBand;

class GDALAsyncReader;









int main(int argc,char* argv)

{



    ///*/*/*/*/*/*/*/*/*/*Getting Dataset Information*/*/*/*/*/*/*/*/*/*/



    GDALDataset *poDataset;





    //GDALDatasetH *poDatasetH;

    const char* Raster = new char[256];

    double  adfGeoTransform[6];





    GDALAllRegister();  



    Raster = "C:\Users\User\Desktop\DSI REFERENCE\Map Data\Raster\4257.tif";



    poDataset = (GDALDataset *) GDALOpen(Raster, GA_ReadOnly )CPL_WARN_UNUSED_RESULT;

    //poDataset = (GDALDataset *) GDALOpen(Raster, GA_ReadOnly );



    if( poDataset == NULL )

    {

        printf("Not found");

    }         

    else

    {

        printf( "Driver: %s/%sn",

        poDataset->GetDriver()->GetDescription(),

        poDataset->GetDriver()->GetMetadataItem( GDAL_DMD_LONGNAME ) );



        printf( "Size is %dx%dx%dn",

        poDataset->GetRasterXSize(), poDataset->GetRasterYSize(),

        poDataset->GetRasterCount() );



    if( poDataset->GetProjectionRef()  != NULL )

        printf( "Projection is `%s'n", poDataset->GetProjectionRef() );



    if( poDataset->GetGeoTransform( adfGeoTransform ) == CE_None )

    {

        printf( "Origin = (%.6f,%.6f)n",

            adfGeoTransform[0], adfGeoTransform[3] );

        printf( "Pixel Size = (%.6f,%.6f)n",

            adfGeoTransform[1], adfGeoTransform[5] );



    }



    }



    ///*/*/*/*/*/*/*/*/*/*  Fetching a Raster Band*/*/*/*/*/*/*/*/*/*/



    GDALRasterBand  *poBand;

    int   nBlockXSize, nBlockYSize;

    int   bGotMin, bGotMax;

    double  adfMinMax[2];



    poBand = poDataset->GetRasterBand( 1 );

    poBand->GetBlockSize( &nBlockXSize, &nBlockYSize );



    printf( "Block=%dx%d Type=%s, ColorInterp=%sn", nBlockXSize, nBlockYSize,GDALGetDataTypeName(poBand->GetRasterDataType()), 

    GDALGetColorInterpretationName( poBand->GetColorInterpretation()) );



    adfMinMax[0] = poBand->GetMinimum( &bGotMin );

    adfMinMax[1] = poBand->GetMaximum( &bGotMax );



    if( ! (bGotMin && bGotMax) )

    GDALComputeRasterMinMax((GDALRasterBandH)poBand, TRUE, adfMinMax);



    printf( "Min=%.3fd, Max=%.3fn", adfMinMax[0], adfMinMax[1] );



    if( poBand->GetOverviewCount() > 0 )

    printf( "Band has %d overviews.n", poBand->GetOverviewCount() );



    if( poBand->GetColorTable() != NULL )

    printf( "Band has a color table with %d entries.n",

             poBand->GetColorTable()->GetColorEntryCount() );



    // make it 256 bytes for a string length of 255 plus null () terminator



    ///*/*/*/*/*/*/*/*/*/*/*Reading Raster Data*/*/*/*/*/*/*/*/*/*/*/



    float *pafScanline;

    int   nXSize = poBand->GetXSize();

    pafScanline = (float *) CPLMalloc(sizeof(float)*nXSize);

    poBand->RasterIO( GF_Read, 0, 0, nXSize, 1,pafScanline, nXSize, 1, GDT_Float32,0, 0 );



    ///*/*/*/*/*/*/*/*/*/*/*Techniques for Creating Files (determine whether it supports Create() and/or CreateCopy().) */*/*/*/*/*/*/*/*/*/*/



    const char *pszFormat = "GTiff";

    GDALDriver *poDriver;

    char **papszMetadata;

    poDriver = GetGDALDriverManager()->GetDriverByName(pszFormat);



    if( poDriver == NULL )

        exit( 1 );



    papszMetadata = poDriver->GetMetadata();

    if( CSLFetchBoolean( papszMetadata, GDAL_DCAP_CREATE, FALSE ) )

        printf( "Driver %s supports Create() method.n", pszFormat );



    if( CSLFetchBoolean( papszMetadata, GDAL_DCAP_CREATECOPY, FALSE ) )

        printf( "Driver %s supports CreateCopy() method.n", pszFormat );



    ///*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*Using CreateCopy()*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/



    const char*pszDstFilename= new char[256];



    GDALDataset *poSrcDS =(GDALDataset *) GDALOpen( pszDstFilename, GA_ReadOnly );

    GDALDataset *poDstDS;

    poDstDS = poDriver->CreateCopy( pszDstFilename, poSrcDS, FALSE,NULL, NULL, NULL );

    /* Once we're done, close properly the dataset */

    if( poDstDS != NULL )

    GDALClose( (GDALDatasetH) poDstDS );

    GDALClose( (GDALDatasetH) poSrcDS );



    std::cin.get();



    //delete Raster;// release the memory VERY IMPORTANT





}

You haven't set the variable pszDstFilename to anything meaningful. You allocated it, but it just contains random junk. You need to put a valid existing dataset into it for anything useful to happen in the call to GDALOpen(). The documentation states:

Once the drivers are registered, the application should call the free standing GDALOpen() function to open a dataset, passing the name of the dataset and the access desired (GA_ReadOnly or GA_Update).