Spatial crowdsourcing is an extension of general crowdsourcing. Specifically, in spatial crowdsourcing, crowd or workers need to physically move to a particular place associated with a spatial task. In different branch areas of computer science, this new topic has different names, such as spatial crowdsourcing, mobile crowdsourcing and participatory sensing. Here is a reading list about this topic. I will update it aperiodically.
Sadilek A, Krumm J, Horvitz E. Crowdphysics: Planned and opportunistic crowdsourcing for physical tasks[J]. SEA, 2013, 21(10,424): 125,620.
Chen C, Cheng S F, Lau H C, et al. Towards City-scale Mobile Crowdsourcing: Task Recommendations under Trajectory Uncertainties[J].
Boutsis I, Kalogeraki V. On task assignment for real-time reliable crowdsourcing[C]//Distributed Computing Systems (ICDCS), 2014 IEEE 34th International Conference on. IEEE, 2014: 1-10.
Alt F, Shirazi A S, Schmidt A, et al. Location-based crowdsourcing: extending crowdsourcing to the real world[C]//Proceedings of the 6th Nordic Conference on Human-Computer Interaction: Extending Boundaries. ACM, 2010: 13-22.
Kanhere S S. Participatory sensing: Crowdsourcing data from mobile smartphones in urban spaces[C]//Mobile Data Management (MDM), 2011 12th IEEE International Conference on. IEEE, 2011, 2: 3-6.
Kazemi L, Shahabi C. Geocrowd: enabling query answering with spatial crowdsourcing[C]//Proceedings of the 20th International Conference on Advances in Geographic Information Systems. ACM, 2012: 189-198.
Musthag M, Ganesan D. Labor dynamics in a mobile micro-task market[C]//Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. ACM, 2013: 641-650.
Rula J P, Navda V, Bustamante F E, et al. No one-size fits all: Towards a principled approach for incentives in mobile crowdsourcing[C]//Proceedings of the 15th Workshop on Mobile Computing Systems and Applications. ACM, 2014: 3.
Yang D, Xue G, Fang X, et al. Crowdsourcing to smartphones: incentive mechanism design for mobile phone sensing[C]//Proceedings of the 18th annual international conference on Mobile computing and networking. ACM, 2012: 173-184.