Title: Stratified Heterogeneity Measure, Dominant Driving Force
Authors@R: c(person("Chengdong", "Xu", email = "xucd@Lreis.ac.cn", role = c("aut", "cre")),person("Jinfeng", "Wang", email = "wangjf@Lreis.ac.cn", role = c("aut")),person("Yue", "Hou" , role = "ctb"),person("Qian", "Yin", role = "ctb"))
Description: Spatial stratified heterogeneity (SSH), referring to the within strata are more similar than the between strata, a model with global parameters would be confounded if input data is SSH. Note that the "spatial" here can be either geospatial or the space in mathematical meaning. Geographical detector is a novel tool to investigate SSH: (1) measure and find SSH of a variable Y; (2) test the power of determinant X of a dependent variable Y according to the consistency between their spatial distributions; and (3) investigate the interaction between two explanatory variables X1 and X2 to a dependent variable Y (Wang et al 2014 <doi:10.1080/13658810802443457>, Wang, Zhang, and Fu 2016 <doi:10.1016/j.ecolind.2016.02.052>).

Title: Definition of Geographic Dimensions
Description: The geographic dimension plays a fundamental role
in multidimensional systems. To define a geographic dimension
in a star schema, we need a table with attributes corresponding
to the levels of the dimension. Additionally, we will also need
one or more geographic layers to represent the data using this
dimension. The goal of this package is to support the definition
of geographic dimensions from layers of geographic information
related to each other. It makes it easy to define relationships
between layers and obtain the necessary data from them.
Imports: dplyr, readr, tibble, tidyr, tidyselect, generics, sf,

Title: Fast, Dependency-Free Geodesic Distance Calculations
comment="Original author of included code for geodesic distances"))
Description: Dependency-free, ultra fast calculation of geodesic distances.
Includes the reference nanometre-accuracy geodesic distances of Karney
as Haversine and Vincenty distances. Default distance measure is the "Mapbox
cheap ruler" which is generally more accurate than Haversine or Vincenty for
distances out to a few hundred kilometres, and is considerably faster. The
main function accepts one or two inputs in almost any generic rectangular
form, and returns either matrices of pairwise distances, or vectors of
Charles F.F Karney [cph] (Original author of included code for geodesic