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eik = total length (m) of edge in landscape between patch types (classes) i and k; includes landscape boundary segments involving patch type i. e*ik = total length (m) of edge in landscape between patch types (classes) i and k; includes the entire landscape boundary and all background edge segments, regardless of whether they represent edge or not. dik = dissimilarity (edge contrast weight) between patch types i and k. |
| Description | TECI equals the sum of the lengths (m) of each edge segment involving the corresponding patch type multiplied by the corresponding contrast weight, divided by the sum of the lengths (m) of all edge segments involving the same type, multiplied by 100 (to convert to a percentage). Edge segments along the landscape boundary are treated like background (as specified in the edge contrast weight file) unless a landscape border is present, in which case the boundary edge types are made explicit by the information in the border. |
| Units | Percent |
| Range | 0 ≦ TECI ≦ 100 TECI = 0 when there is no class edge in the landscape; that is, when the entire landscape and landscape border, if present, consists of the corresponding patch type and the user specifies that background edge be given a zero-contrast weight (d = 0). TECI approaches 0 as the contrast in edges involving the corresponding patch type lesson (i.e., contrast weight approaches 0). TECI = 100 when all class edge is maximum contrast (d = 1). |
| Comments | Total edge contrast index is similar to the edge contrast index at the patch level, only here it is applied to all edges of the corresponding patch type |
