Computing geographical access to services: the design of an open-source multimodal client-server solution

This study describes the design and implementation of a web-based solution for computing geographic accessibility, using open-source elements. The computation of accessibility scores incorporates the use of multiple modes of transportation and can be adapted to any form of service provision that can be represented as geographic points. The solution provided aims to extend previous attempts at measuring multi-modal accessibility by integrating a new approach of generating required variables to perform these calculations in a fully open source, open data environment. The infrastructure of this solution is described, demonstrating how the transport distances are generated and applied within the FCA calculation.