topic Re: Different UTM zones in Data Management Questions

Different UTM zones

EvertonParaguassú_da_Silva — Wed, 04 May 2011 01:11:43 GMT

Good evening my friend!

We are developing a GIS project for the state government of Bahia / Brazil. The problem is that our state is divided into two UTM zones 23/24. I wonder when it comes to 10 ArcSDE and Oracle 11g, if we could model the database using a table for each entity and if you have any examples.

Re: Different UTM zones

VinceAngelo — Wed, 04 May 2011 10:54:54 GMT

UTM zones exist because, once you get toward the edges, the error becomes unacceptable
for high precision tasks. There is still room for lower precision tasks ~2-3 degrees into the
neighboring zone, but you might be better off using an Albers projection which covers your
area of interest properly. I don't recommend you split your data across two different zones,
then try to align them on the fly.

- V

Re: Different UTM zones

EvertonParaguassú_da_Silva — Wed, 04 May 2011 12:59:56 GMT

UTM zones exist because, once you get toward the edges, the error becomes unacceptable
for high precision tasks. There is still room for lower precision tasks ~2-3 degrees into the
neighboring zone, but you might be better off using an Albers projection which covers your
area of interest properly. I don't recommend you split your data across two different zones,
then try to align them on the fly.

- V

I wold like to know if you have a modeling case about the problem outlined ? Today we are splitting into two Feature Class for example:

PGO_Municiple_23 (all municiples contained in zone 23) and PGO_Municiple_24 (all municiples contained in zone 24)

But i would like to store in only one Feature. I would like to know if i can store two UTM zones in the same Feature Class.

Thanks a lot.

bests regards.

Re: Different UTM zones

VinceAngelo — Wed, 04 May 2011 13:18:55 GMT

No, all data in any single table must be in *one* projection. You must reproject all data
into a common projection.

- V