Many of the variables that determine the delivered cost of woody biomass have spatial attributes. Transportation distance is often cited as a critical constraint on the financial feasibility of biomass utilization but in a heterogeneous landscape the distribution, quality, ownership, management and accessibility of forestland also have spatial dimensions that influence biomass supply. The following section discusses the tools and approaches that are used to perform spatial analysis of feedstock supply to inform logistics. Though the techniques can be complex, their broad purpose is to help estimate how much biomass can be supplied to a specific facility at a given cost.