Patent ID: 8515125

Claim:
A process for assigning attributes of a roof structure of a real-world three-dimensional building, comprising the acts of: Visually depicting on a computer monitor digital aerial imagery of a region including the roof structure, the roof structure having at least a first roof plane and a second roof plane; Creating an electronic drawing first layer over said imagery; Creating an electronic drawing second layer over said imagery; In creating said first layer, generating in computer memory a first outline drawing corresponding to and visually depicting said first roof plane, said first outline drawing including at least three lines, namely A, B and C lines; In creating said second layer, generating in computer memory a second outline drawing corresponding to and visually depicting said second roof plane, said second outline drawing including at least three lines, namely E, F and G lines; In creating said first layer and said second layer, in computer memory: (a) substantially overlapping at least a segment of line A from said first layer with at least a segment of line E from said second layer; and, (b) assigning a first non-dimensional attribute to said line A; and, (c) assigning a second non-dimensional attribute to line E, wherein said first non-dimensional attribute is different from said second non-dimensional attribute.