Fragstats and landscape metrics
Sponsored Links
This presentation is the property of its rightful owner.
1 / 43

Fragstats and Landscape Metrics PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

Fragstats and Landscape Metrics. Bill Dijak Wildlife Biologist/GIS Specialist USDA Forest Service Room 309. Map Projection. UTM, Universal Transverse Mercator. Datum, NAD1927, NAD1983, WGS1984. Missouri use NAD1983, Zone 15, Unit meters. Two forms of GIS data.

Download Presentation

Fragstats and Landscape Metrics

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Fragstats and Landscape Metrics

Bill Dijak

Wildlife Biologist/GIS Specialist USDA Forest Service

Room 309

Map Projection

  • UTM, Universal Transverse Mercator.

  • Datum, NAD1927, NAD1983, WGS1984.

  • Missouri use NAD1983, Zone 15, Unit meters.

Two forms of GIS data

  • Vector data, points lines and polygons usually stored as a shapefile (.shp).

  • Raster data stored as square raster cells or pixels.

  • Each raster cell has a numerical value representing a landscape characteristic and resolution which is the length of the side of the raster cell.

  • ESRI rasters are often referred to as grids.

Examples of Raster Data

  • Gap landcover (MORAP)

  • Landsat satellite imagery

  • Digital elevation models (DEM)

  • Digital raster graphics (DRG)

  • Landform

Fragstats 3.3



Fragstats 3.3

  • Click Fragstats and select Set Run Parameters.

Class Properties File

Class ID, Class Name, Status, Is Background








Patch Metrics

  • Provide metric information for each and every patch found in the landscape

  • Generate an Enormous amount of information.

  • Are useful for generating information for specific locations on the landscape such as nest locations or point count locations.

  • Example: An area-sensitive species selects patches of forest of some minimum size.

Fragstats: Select Patch Metrics

Weighting tables can be created in Excel

But must be saved as CSV files






Rows represent the focal class, columns

the “with” class

Fragstats: Select Class metrics

Fragstats: Select Landscape Metrics

File: Save as

  • Saves all your parameter settings to one file _______.frg

  • Can be opened and reused using

  • File: Open

Fragstats: Execute

Executes program using the

parameter files and generates

comma delimited files




These files can be imported into excel.


So, what metrics do I need?

  • It depends on what landscape charateristics you believe are impacting your species of intererst.

  • Most landscape scale wildlife studies are concerned with the amount and spatial characteristics of habitat.

  • Amount is is determined using pland in the class parameter settings

Nest predation example

  • Patch area (Area)

  • Patch shape (Shape)

  • Patch core area index% (CAI)

  • Class edge density (ED)

  • Class habitat percentage (Pland)

  • Class aggregation Index (AI)

Area Sensitive Interior Species

  • Patch area (Area)

  • Patch area standard deviation (Area_CSD)

  • Class habitat percentage (Pland)

  • Class mean patch area (Area_MN)

  • Class patch area variation (Area_SD)

  • Class total core area (TCA)

  • Class core area percent of landscape (CPLAND)

Population Viability (Extinction and Recolinization)

  • Class habitat percentage (PLAND)

  • Class number of patches (NP)

  • Class largest patch index (LPI)

  • Class mean euclidean nearest neighbor distance (ENN_MN)

  • Class variation in euclidean nearest neighbor distance (ENN_SD)

  • Class Connectance Index (CONNECT)


  • Email: [email protected]

  • Do not send email to my email unless you want to wait a few days for a response.

  • Login