Oops, I think that should be ceiling( (180 + lng) / 6), where lngs
west of Greenwich are < zero.
-Larry
On Tue, Dec 8, 2009 at 9:59 AM, Larry Reeder <[email protected]> wrote:
> (sorry about the dup Rob, I meant to send this to the list, not you directly)
>
> Hey Rob,
>
> I'm not sure about a Geotools mechanism, but if you read up on UTM
> zones in Wikipedia, you'll see there is a straightforward mathematical
> test you can use to determine which UTM zone a lat-lng point falls in.
> You should check my math, but something like:
>
> ceiling((180 - lng) / 6)
>
> will give you the zone number, and you can set the N/S hemisphere
> identifier based on whether your point is north or south of the
> equator. Note that UTM is only good between 80S and 84N, so you'll
> need to figure out what to do with your high/low latitude points.
>
> -Larry
>
>
> On Tue, Dec 8, 2009 at 8:55 AM, Heise, Robert <[email protected]>
> wrote:
>> Hello All,
>>
>>
>>
>> I have over 1 million points (lat/long) that I need to dynamically determine
>> what UTM zone they are in for projection and distance calculations. Is
>> there a convenient mechanism using GeoTools 2.6 to handle this conversion?
>> The data is based on a WGS84 CRS.
>>
>>
>>
>> Thanks in advance
>>
>> Rob
>>
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