Many models for spatial and spatio-temporal data assume that "near things are more related than distant things," which is known as the first law of geography. While geography may be important, it may not be all-important, for at least two reasons. First, technology helps bridge distance, so that regions separated by large distances may be more similar than would be expected based on geographical distance. Second, geographical, political, and social divisions can make neighboring regions dissimilar. We develop a flexible Bayesian approach for learning from spatial data which units are close in an unobserved socio-demographic space and hence which units are similar. As a by-product, the Bayesian approach helps quantify the relative importance of socio-demographic space relative to geographical space. To demonstrate the proposed approach, we present simulations along with an application to county-level data on median household income in the U.S. state of Florida.
翻译:许多空间和时空数据模型假设"近处事物比远处事物更相关",这被称为地理学第一定律。尽管地理因素可能重要,但至少基于两个原因它并非绝对重要:第一,技术有助于弥合距离,使得相隔遥远距离的区域可能比基于地理距离预期的更为相似;第二,地理、政治和社会分隔可能使邻近区域差异显著。我们开发了一种灵活的贝叶斯方法,用于从空间数据中学习哪些单元在未观测的社会人口空间中接近,从而识别哪些单元具有相似性。作为副产品,该贝叶斯方法有助于量化社会人口空间相对于地理空间的相对重要性。为展示所提出方法,我们通过模拟实验以及针对美国佛罗里达州县级家庭收入中位数数据的应用实例进行了验证。