One way to interpret the OmniScape outputs is to first create the Regional Flow Potential map (see in report) by running Omniscape with a value of 1 for the resistance surface, and using the normal source surface, then dividing Regional Flow Potential by current flow to create the Normalized Flow Potential intermediate layer. The result is then a continuously valued surface that is then classified into different classes to yield the classified Normalized Current Flow. To do the classifications, we used the approach described in McRae et al. (2016), with assistance from Aaron Jones, with the standard set of five flow classes – channeled, intensified, diffuse: high, diffuse: low, and impeded. Distinctions between classes were identified based upon logical distinctions between classes on the landscape and expert knowledge of the region.
McRae, B. H., K. Popper, A. Jones, M. Schindel, S. Buttrick, K. Hall, R. S. Unnasch, and J. Platt. 2016. “Conserving Nature’s Stage: Mapping Omnidirectional Connectivity for Resilient Terrestrial Landscapes in the Pacific Northwest.” Portland, Oregon: The Nature Conservancy. https://conservationgateway.org/ConservationByGeography/NorthAmerica/UnitedStates/oregon/science/Documents/McRae_et_al_2016_PNW_CNS_Connectivity.pdf.
More details are in the report:
Gallo, J.A., E.C. Butts, T.A. Miewald, K.A. Foster. 2019. Comparing and Combining Omniscape and Linkage Mapper Connectivity Analyses in Western Washington. Published by: Conservation Biology Institute. Corvallis, OR, https://doi.org/10.6084/m9.figshare.8120924
Original file name: Classified Normalized Current Flow
We provide advanced conservation science, technology, and planning to empower our partners in solving the world’s critical ecological challenges