[gdal-dev] NAD27 to NAD83

[Frank Warmerdam]

Donnet , Sebastien wrote:
> Hi,
>  
> I have a bunch of data in NAD27 (lat, lon ascii files) that I would like 
> to convert into NAD83.
> How can I do that easily with gdal?
>  
> Up to now I've tried it like this:
>  
> gdaltransform -s_srs NAD27 -t_srs NAD83 < nad27.txt > nad83.txt
>  
> using a nad27.txt that looks like that (tab separated):
>  
> 71.9881 -80.7771
> 71.9880 -80.7199
> 71.8889 -80.9131
> 71.8892 -80.9117
> 71.9041 -80.8410
>  
> but didn't go anywhere... a nad83.txt was created, but blank... 
> what input format am I supposed to provide?  (I tried comma separated 
> among others...)

Sebastien,

It turns out they need to be space separated instead of tab separated.
Also, put the longitude first.  If you file a ticket on this limitation
we will likely get to fixing it.

gdaltransform -s_srs NAD27 -t_srs NAD83

-80.7771 71.9881
-80.776396134163 71.9887576959729 9.47713851928711e-05

Best regards,
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