3D GIS dilemma

Multi-Z’s per X, Y

(no violation of topology

as integrity constraint)

x (X,Y,Z2)

x (X,Y,Z2)

Natural Resources: Mineral leases by depths

A/E/C: Volumes with overhangs

Shallow rights

Deep rights

Operator A

Operator B

(X,Y,Z1) x

(salt domes in Natural Resources)

(X,Y,Z1) x