ABSTRACT
Introduction Resource trade is an important basis for contemporary economic structure in the world. Linear facilities are the physical manifestation of this reality, providing for the transportation of resources from the source of supply to centres of demand (e.g. transmission lines and pipelines) and the very basis for transportation itself (e.g. highways and railways). Linear facilities exist as networks, usually on a regional scale and tend to be a highly visible, tangible and intrusive component of the landscape.
