component; Patch Density (PD), NP (Number of Patches) for subdivision and spatial
configuration of the landscape.
NP is a simple measure of the extent of subdivision or fragmentation of the patch type. In
particular, NP illustrates the diffuse sprawling development and the fragmentation of rural
areas. NP is simply the total number of patches and is a measure of landscape configuration
and is closely related to spatial scale of analysis and to the extent of the landscape.
Therefore, this metric is more meaningful for comparing the same landscape or landscape
with similar size and characteristics. NP and PD reveal the landscape fragmentation process
[Botequilha Leitão et al., 2006] and they serve as good fragmentation and heterogeneity
indices when used to compare the same landscape in different time periods. On the other
hand, PD facilitates comparisons among the sub-plots defined in terms of fragmentation
caused by urbanization process.
The Largest Patch Index (LPI) indicates the percentage of class accounted for by largest
patch and is a simple measure of the dominance of a LC type.
Contagion (CONTAG) measures the degree to which patch types (class) are distributed in a
clumpy manner instead to being dispersed in many smaller fragments. In other words, this
metric is a measure of landscape configuration and texture and refers to the tendency of
classes to be spatially aggregated. CONTAG provides an objective means for quantifying the
spatial pattern differences between landscapes [Botequilha Leitão et al., 2006]. Therefore,
this index is meaningful in order to compare spatial and temporal dynamics in the same
landscape in different times. CONTAG approaches 0 when the patch types are maximally
disaggregated, 100 when they are maximally aggregated [McGarigal and Marks, 1995;
Botequilha Leitão et al., 2006].
component; Patch Density (PD), NP (Number of Patches) for subdivision and spatial
configuration of the landscape.
NP is a simple measure of the extent of subdivision or fragmentation of the patch type. In
particular, NP illustrates the diffuse sprawling development and the fragmentation of rural
areas. NP is simply the total number of patches and is a measure of landscape configuration
and is closely related to spatial scale of analysis and to the extent of the landscape.
Therefore, this metric is more meaningful for comparing the same landscape or landscape
with similar size and characteristics. NP and PD reveal the landscape fragmentation process
[Botequilha Leitão et al., 2006] and they serve as good fragmentation and heterogeneity
indices when used to compare the same landscape in different time periods. On the other
hand, PD facilitates comparisons among the sub-plots defined in terms of fragmentation
caused by urbanization process.
The Largest Patch Index (LPI) indicates the percentage of class accounted for by largest
patch and is a simple measure of the dominance of a LC type.
Contagion (CONTAG) measures the degree to which patch types (class) are distributed in a
clumpy manner instead to being dispersed in many smaller fragments. In other words, this
metric is a measure of landscape configuration and texture and refers to the tendency of
classes to be spatially aggregated. CONTAG provides an objective means for quantifying the
spatial pattern differences between landscapes [Botequilha Leitão et al., 2006]. Therefore,
this index is meaningful in order to compare spatial and temporal dynamics in the same
landscape in different times. CONTAG approaches 0 when the patch types are maximally
disaggregated, 100 when they are maximally aggregated [McGarigal and Marks, 1995;
Botequilha Leitão et al., 2006].
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