Three BCL members, Dr Ying Long, Dr Kang Wu and Dr Qizhi Mao, have recently finished a study on simulating parcel-level urban expansion for all Chinese cities. We have uploaded the working paper on the BCL website as follows.
"31 Simulating parcel-level urban expansion for all Chinese cities"
Expanded 43,247 parcels during 2012-2017 in the business-as-usual simulation scenario (BAU) for 654 Chinese cities are available online, as The BCL Voice on Future Urban Development of China.
"20 Expanded parcels during 2012-2017 by MVP-CA"
Abstract: Large-scale models are generally associated with big modelling units in space, like counties or super grids (several to dozens km2). Few applied urban models can pursue large-scale extent with fine-level units simultaneously due to data availability and computation load. The framework of automatic identification and characterization parcels developed by Long and Liu (2013) makes such an ideal model possible by establishing existing urban parcels using
road networks and points of interest for a super large area (like a country or a continent). In this study, a mega-vector-parcels cellular automata model (MVP-CA) is developed for simulating urban expansion at the parcel level for all 654 Chinese cities. Existing urban parcels in 2012, for initiating MVP-CA, are generated using multi-levelled road networks and ubiquitous points of interest, followed by simulating parcel-based urban expansion of all cities during 2012-2017. Reflecting national spatial development strategies discussed extensively by academics and decision makers, the baseline scenario and other two simulated urban expansion scenarios have been tested and compared horizontally. As the first fine-scale urban expansion model from the national scope, its academic contributions, practical applications, and potential biases are discussed in this paper as well.