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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