Class Area |
\(N=\sum_{i=1}^{n}a_{i}\) |
\(N=\sum_{i=1}^{n}a_{i}\) |
Total area of a certain type of
class. |
Patch Density |
\(PD=N/A\) |
\(PD=N/A\) |
Indicates the number of
patches per unit area. |
Largest Patch Index |
\(LPI=Max\ (a_{1}\ldots a_{n})\ /A*100\) |
\(LPI=Max\ (a_{1}\ldots a_{n})\ /A*100\) |
Quantifies the percentage
of total landscape area comprised by the largest patch. As such, it is a
simple measure of dominance. |
Splitting Index |
\(SPLIT=A^{2}/\sum_{1}^{m}a_{i}^{2}\) |
\(SPLIT=A^{2}/\sum_{1}^{m}a_{i}^{2}\) |
Indicates the degree of
dispersion and aggregation between patches of the same landscape type.
The greater the value, the more separated the landscape, and the greater
the number of small patches in the landscape. |
Aggregation Index |
\(AI=\left[\sum_{i=1}^{m}{(g_{\text{ii}}/maxg_{\text{ii}})p_{i}}\right]*100\) |
\(AI=\left[\sum_{i=1}^{m}{(g_{\text{ii}}/maxg_{\text{ii}})p_{i}}\right]*100\) |
Reflects the proximity of the same type of plaque. When there is no
common boundary between all plaques, the degree of aggregation is the
lowest. |