Geospatial Habitat Assessment Tool: GeoHAT
A soup to nuts multi-criteria decision support tool for habitat patch prioritization.
GeoHAT is a geoprocessing workspace that assembles the geospatial database for given analysis extent (either user defined or from a selected sub-basin) that enables calculation of several habitat patch attributes. Data are derived from publicly available data in the US (NLCD, NHD, SSURGO), and habitat can be extracted from NLCD classes or provided by the user.
Habitat patches can be prioritized on a combination of key patch attributes groups:
- Patch size/shape
- Patch connectivty to other patches
- Patch connectivity to protected areas
- Patch vulnerability
- Patch biodiversity (actual and potential)
Each patch attribute group, in turn, has its own criteria for evalation. For example, patch size/shape can be based on patch area, core area, shape index, mean distance to edge - or any weighted combination thereof. The choices should be reflect your decision objective hierarchy and can lead to different results.
- Create a habitat raster
Extracts a specific land use class from NLCD raster to create a habitat/NoData output.
- Create habitat patch raster
Gives a unique id to each contiguous set of habitat cells, with the option of cleaning the boundaries of these clusters and of removing clusters below a specified area.
- Create patch based rasters
- Calculate patch geometry attributes
- Calculate patch connectivity attributes
- Create a composite raster of patch attributes
- Compute a weighted overlay of patch attributes?