More often than not, spatial objects are associated with some context, in the form of text, descriptive tags (e.g., points interest, flickr photos), or linked entities semantic graphs Yago2, DBpedia). Hence, location-based retrieval should be extended to consider not only locations but also context objects, especially when retrieved too many and query result is overwhelming. In this article, we...

In this paper, we study the asymptotic theory for spectral analysis of stationary random fields on Z2, including linear and nonlinear fields. Asymptotic properties Fourier coefficients periodograms, limiting distributions coefficients, uniform consistency kernel density estimators are obtained under various mild conditions moments dependence structures. The validity aforementioned results estim...

Abstract Theoretical units of interest often do not align with the spatial at which data are available. This problem is pervasive in political science, particularly subnational empirical research that requires integrating across incompatible geographic (e.g., administrative areas, electoral constituencies, and grid cells). Overcoming this challenge researchers only to scale theoretical units, b...