Volume 11, Number 2, July 2019 Join SIGSPATIAL NOW   Foreword i-ii Message from the EditorAndreas Züfle  1 Section 1: Special Issue on Visions and Challenges Introduction to this Special Issue Andreas Züfle 2-4 GeoAI at ACM SIGSPATIAL: Progress, Challenges, and Future DirectionsYingjie Hu, Song Gao, Dalton Lunga, Wenwen Li, Shawn Newsam, Budhendra Bhaduri 5-15 Batman […]