The output table will be saved as a dBase IV (.dbf) file and will be saved to the location predetermined by the user. The user will be prompted to name the output table and set it's location before the analysis will run. 附注1
Patch Analyst Statistic Summary Statistic Statistic
Applicable on Name
Abbreviation
ShapeLayer (Theme)
Area Metrics
Class Area
Total Landscape Area
Percentage of Landscape (%) Largest Patch Index (%)
Patch Density & Size Metrics No. of Patches Mean Patch Size Median Patch Size
Patch Size Coefficient of Variance Patch Size Standard Deviation Patch Richness
Patch Richness Density
Edge Metrics Total Edge Edge Density
Applicable on
Raster (Grid) Layer
(Theme)
CA Y Y TLA Y Y ZLAND N Y LPI N Y NumP Y Y MPS Y Y MedPS Y N PSCoV Y Y PSSD Y Y PR PRD TE Y Y ED Y Y
Mean Patch Edge MPE Y Y Contrasted Weighted Edge Density CWED N Y Shape Metrics Mean Shape Index MSI Y Y Area Weighted Mean Shape Index AWMSI Y Y Mean Perimeter-Area Ratio MPAR Y N Mean Patch Fractal Dimension MPFD Y Y Area Weighted Mean Patch Fractal Dimension AWMPFD Y Y Landscape Shape Index LSI N Y Double Log Fractal Dimension DLFD N Y Diversity & Interspersion Metrics Mean Nearest Neighbour Distance MNN Y Y Mean Proximity Index MPI Y Y Interspersion Juxtaposition Index IJI Y Y Shannon's Diversity Index* SDI Y Y Shannon's Evenness Index* SEI Y Y Simpson's Diversity Index* SIDI N Y Simpson's Evenness Index SIEI N Y Modified Simpson's Diversity Index MSIDI N Y Core Area Metrics Total Core Area TCA ** Y Mean Core Area MCA ** Y Core Area Standard Deviation CASD ** Y Core Area Coefficient of Variance CACOV ** Y Core Area Density CAD ** Y Total Core Area Index TCAI ** Y Core Area percent of Land (%) C_LAND N Y Number of Core Areas NCA N Y Mean Corea Area per patch (ha) MCA1 N Y Patch Core Area Standard Deviation (ha) CASD1 N Y Patch Core Area Coefficient of Variation (%) CACV1 N Y Mean Core Area Index MCAI N Y
Notes
All core area metrics are per disjunct cores. * applicable only at the landscape level
** core area metrics are directly applicable for raster (grid) layers (themes). For vector layers (themes) create a core area layer (theme). 附注2
Metric Definitions (from McGarigal and Marks, 1994 and McGarigal and Marks, 1995) Class Area (CA)
Sum of areas of all patches belonging to a given class. Example: Conifer Class Area (CA) = 359047.844+......+65819.984 CA = 69.6626 hectares
If the map units are not specified (i.e., Data Frame properties; see Set map units) and \selected in the \dialog box, then the resulting statistics will be reported in native map units (vector layers (themes) only).
In the example; CA = 696626.012 (map units). This is the case for most statistics.
Landscape Area (TLA)
Sum of areas of all patches in the landscape.
Example: Landscape Area (TLA) = 46872.719 + 359047.844 +... + 62423.574
TLA = 184.11 hectares
Percentage of Landscape (ZLAND)
When analyzing by class, ZLAND is the percentage of the total landscape made up of the corresponding class (patch type). Number of Patches (NumP)
Total number of patches in the landscape if \by Landscape\is selected, or Number of Patches for each individual class, if \
Example: Class Level: Number of Patches (NumP) Mixedwood = 5, Conifer = 4, Deciduous = 5 Landscape Level: Number of Patches (NumP) = 14
Patch Richness (PR)
PR is the number of different patch types within the landcape's boundary.
Patch Richness Density (PRD)
PRD is equal to PR divided by the total area of the landscape (metres squared) multiplied by 10,000 and then 100 (to convert to hundreds of hectares).
Largest Patch Index (LPI)
The LPI is equal to the percent of the total landscape that is made up by the largest patch.
When the entire landscape is made up of a single patch, the LPI will equal 100. As the size of the largest patch decreases, the LPI approaches 0.
Mean Patch Size (MPS) Average patch size.
Example: Mean Patch Size of Conifer Patches (Class Level) MPS = (359047.844 + 139531.484 ...+ 65819.984)/4 MPS = 17.42 hectares
Example: Mean Patch Size of Patches (Landscape Level) MPS = (46872.719 + 359047.844 + ... + 62432.574)/14 MPS = 13.15 hectares
Median Patch Size (MedPS)
The middle patch size, or 50th percentile.
Example: Median Patch size of Conifer Patches (Class Level) MedPS = 13.22 hectares
Example: Median Patch size of all patches (Landscape Level) MedPS = 7.59 hectares
Patch Size Standard Deviation (PSSD) Standard Deviation of patch areas.
Example: Patch Size Standard Deviation of Conifer Patches (Class Level)
PSSD = 11.05 hectares
Example: Patch Size Standard Deviation of all patches (Landscape Level)
PSSD = 9.51 hectares
Patch Size Coefficient of Variance (PSCoV)