[Shapelib] Shapelib test

[Frank Warmerdam]

Jamie Lahowetz wrote:
> I am learning C so humor me. I have a simple script but everytime I run 
> it I get a segmentation fault. Any ideas?
> 
> #include <shapefil.h>
> 
> int main (void)
> {
>     const char * shapefile = "/mnt/share/uas/GRRUVI2_uc/
> extractor/colorado/fe_2007_08_county";
>     SHPHandle handle;
>     int entities;
>     int type;
>     double minbound;
>     double maxbound;
>    
>     printf("%s\n", shapefile);
>    
>     handle = SHPOpen(shapefile,"rb");
>     SHPGetInfo( handle,&entities,&type,&minbound,&maxbound);
>    
>     SHPClose(handle);
>     return 0;
> }

Jamie,

The minbound and maxbound arguments need to be pointers to an array of
four values (for the four dimensions possible in a shapefile).

So more like:

...
      double minbound[4];
      double maxbound[4];

      printf("%s\n", shapefile);

      handle = SHPOpen(shapefile,"rb");
      SHPGetInfo( handle,&entities,&type,minbound,maxbound);
...

Best regards,
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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