[Freegis-list] tool to find out lat/lon --> UTM

[Paul Ramsey]

Write up 20 lines of perl to wrap around your proj4 call. The zone value 
is a simple categorization on your longitude, so it is trivial to 
script. Possibly why noone has bothered to make such a think automagic.

P

Cere Davis wrote:

> Hi everyone,
> 
> I have sort of a basic GIS question that doesn't appear to be all that
> obvious to me.
> 
> I am using the proj4 tools in linux to find at utm X-Y zone value for a
> given lat-lon value.  I have played around with it for a bit and I am
> suprised to find that proj requires me to input a default easting zero
> value (such as +lon_0=120w) in order to get meaningful x-y data for my
> zone.  To me this seems like redundant information.  If I give my lon_0
> value then I allready know what zone I am in basicly so this is not very
> usefull to me.  I suppose I could do some pre math and make some
> assumptions about the quadrant that my lat/lon value are in to find the
> lon_0 value before I send arguments to Proj but...  Is there any tool that
> just allows me to type in a lat/lon and returns a x-y and zone value?
> 
> Thanks,
> -Cere
> 
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