Thanks for your reply. I figured I would have to do something like that myself.
How about the State Plane Coordinate System used in the US? It's not so easy to find the appropriate CRS any more. Has anyone else solved this problem?
Regards,
Corey
On 10/25/06, Martin Desruisseaux <[EMAIL PROTECTED]> wrote:
Corey Puffalt a écrit :
> I need to convert groups of coordinates to the UTM projection. What I'm
> looking for is some way to determine the appropriate UTM zone to convert
> each group of coordinates to. Does Geotools provide any way of doing
> this or do I have to figure out the appropriate zone myself? The
> coordinates are initially in NAD27 (EPSG:4267)...
There is no convenience method doing that right now, but this is relatively easy
to to that by yourself:
* Pickup some representative longitude of the coordinates to convert.
* Computes the zone using the following formulas:
zone = Math.floor((longitude + 180) / 6) + 1
(from memory; you will have to check)
* Get a CRS for that UTM zone. An easy trick for that is to use EPSG code.
You need to look in the EPSG database (I don't remember it from memory).
I believe that there is a CRS for UTM zone 1 with some EPSG code like
27010 (just a guess), zone 2 for EPSG:27020, zone 3 for EPSG:26030, etc.
So some code like CRS.decode("EPSG:270" + (zone*10)) should do the trick.
Martin
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