topic Choosing a Projected Coordinate System for Brazil in ArcGIS Enterprise Portal Questions

Choosing a Projected Coordinate System for Brazil

JayceH — Mon, 06 Aug 2012 16:41:01 GMT

Hello,

Can anyone recommend a projected coordinate system for Brazil?

I am using WGS 1984 maps and want to run the Tabulate Intersection function in each of Brazil's 27 states (an area calculation between one feature class and one with 1km² grid squares). Conserving the area is going to play an important factor so I was not if I could use something such as a Continental State system like the South America Albers Equal Area Conic. The other option I have considered was using UTM zones but Brazil lies within seven.

I am pretty new to GIS so wanted to ask for some advice. Any suggestions would be much appreciated!

Thanks in advance.

Jayce

Re: Choosing a Projected Coordinate System for Brazil

SusanneSchlicht — Mon, 20 Aug 2012 18:25:57 GMT

Hi Jayce!

I have the same problem. When working with Landsat images I do have two wgs 84 utm projections. zone 21 & 22. The projection doen't fit together and I am looking for another projection.
How did you manage your problem? Did you find a solution?

Thank you in advance!
Susanne

Re: Choosing a Projected Coordinate System for Brazil

MelitaKennedy — Mon, 20 Aug 2012 18:36:44 GMT

Hi Jayce,

I'm sorry that I didn't respond sooner. You could use the South America Albers coordinate system or customize an Albers-based system for Brazil. The density of vertices is what's important. You don't want any long, two-point arcs (lines) as they won't be accurately represented when reprojected.

Melita