[Shapelib] Shapefile creation

[Frank Warmerdam]

Mike.Sexton at ga.gov.au wrote:
> Hi,
> 
>  
> 
> For some time I have been wondering how one produces shapefiles from 
> scratch and have found it very difficult to find relevant information
> 
> I have numerous files of X,Y data that describe points, lines and 
> polygons that I wnt to capture as shapefiles.
> 
>  
> 
> Fortunately I found  the shapelib pages
> 
>  
> 
> I downloaded the shapelib tar file and shocked myself when the make worked.
> 
>  
> 
> I have been able to make some simple shapefiles by following the 
> instructions, and I am now wondering how I can use my X,Y files.
> 
>  
> 
> For example: shpadd testfile.shp 10.0 1.0 20.0 2.0 30.0 3.0, works fine
> 
>  
> 
> but I want to load an X,Y file containing 1000’s of point into the 
> shapefile. I just cant see how to stream the coordinates into the ahpadd 
> program
> 
>  
> 
> Any advice would be greatly appreciated

Mike,

If you have even a modest mastery of C/C++, it should be possible to modify
the shpadd program to do what you want.  Shpadd is really just intended
as a modest example of using the api.

If not, well, perhaps you could use some other scripting language to
transform your text file into a bunch of shpadd calls?  If not, perhaps
you will have to beg a programmer of some stripe to help.

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