Volume 12, Number 3, November 2020 Join SIGSPATIAL NOW Forward and Table of Contents i-iii Introduction to this Special IssueAndreas Züfle  1-2 Section 1: ACM SIGSPATIAL 2020 Conference Report The 28th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2020)Chang-Tien Lu, Fusheng Wang, Goce Trajcevski, Yan Huang, Shawn Newsam, Li Xiong […]