HiAccess: High-resolution Accessibility Analysis with High Performance Geographic Information System

Accessibility is an important issue in transport geography, land planning and many other related fields. Accessibility problems become computationally demanding when involving high-resolution requirements. In this demonstration, we present an accessibility analysis toolbox with open source code(1), named HiAccess, based on a high performance Geographic Information System, which promotes the performance of geocomputation by leveraging the power of high performance computing. HiAccess demonstrates the striking performance of measuring high-resolution (using 100m x 100m grids) accessibility of a city (in total over 250k grids, roads with 232k segments, 40 facilities) in 1 second without preprocessing, while ArcGIS takes nearly 1 hour to achieve a less satisfactory result.