I have data that spreads across two UTM Zones GDA/MGA94 UTM Zone 55 and 56. I have layers such as a cadastre, roads, pipelines etc where I want to store measurements like lengths and areas in metres or some kind of metric notation, not degrees!
Whats the best way to manage this in PostGIS (i'm using PostGreSQL 8.4 PostGIS 1.5)? Should I be storing my data as GDA94 Geographic coords and using some sort of work around to calculate the measurements I require? Or is there another way to handle this?