UTM Zones

[Phil Chaney]

> We have a map with Lat Long coordinates.
> We would like it to be in UTM like the 
> rest of our maps, but the map crosses
> UTM Zones.  So how do we make the 
> header.  Do we have to force the map into 
> one zone.
> Thank-you
> 
> edwin at hwr.arizona.edu
> 

1. You need to force all of your data into one UTM zone, preferably the
   zone that the majority of your data  is in!

2. If you select the zone to the east, you might end up with negative
   coordinates for your points on the far west side of your study site.

3. If your study area is very wide in the east-west direction, you might
   run into some scale distortions in the areas that are the farthest away
   from the intersection of the UTM zones! This distortion is dependant
   on which zone you choose.

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Phillip L. Chaney                             Center for Advanced
Research Specialist                N          Spatial Technologies
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CAST/NCRI-SW                    W -+- E       --------/--\--------   
University of Arkansas             |           /    \/    \/    \  
Phone: (501) 575-4575              S          National Center for 
E-mail: phil at spock.uark.edu                   Resource Innovations          
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