geomerge.merge: Performing dataset merger [Auxiliary Function]

Description

Auxiliary function that performs the actual integration of the target frame with specified input data. The routine proceeds on dataset at a time.

Usage

geomerge.merge(data,data.name,target,standard.CRS,outdata,wghts,
		time, time.lag,spat.lag,zonal.fun,assignment,
		population.data,point.agg, t_unit,silent,optional.inputs)

Value

Returns an object of class data.frame that contains all information from merger to target to be added to target@data in the main geomerge function. The documentation in geomerge provides a detailed overview over the columns returned and their naming conventions

Arguments

data: input dataset. See Details in geomerge.
data.name: name of input dataset
target: SpatialPolygonsDataFrame representing desired units of analysis. See Details in geomerge.
standard.CRS: Defines the CRS used. Default used in geomerge is WGS84.
outdata: data.frame containing integrated data relative to the SpatialPolygonsDataFrame target.
wghts: spatial weights calculated by link{geomerge.neighbor}.
time: specification of temporal window for temporal binning of point data by c(start_date, end_date, interval_length). Default = NA. See Details in geomerge.
time.lag: Boolean indicating whether or not first and second order temporal lag values of all variables are returned. Default = TRUE.
spat.lag: Boolean indicating whether or not first and second order spatial lag values of all variables are returned. Default = TRUE.
zonal.fun: object of class function applied to values of SpatRaster when generating zonal statistics for each target polygon. Default = sum. See Details in geomerge.
assignment: identification of either population- or area-weighting assignment rules when handling SpatialPolygonsDataFrame joins to target. Default = "area.assign". See Details in geomerge.
population.data: specifies data used for weighting if a population-based assignment rule is selected. See Details in geomerge.
point.agg: specification of aggregation format for data of type SpatialPointsDataFrame. Default = "cnt". See Details in geomerge.
t_unit: temporal unit used for dynamic point aggregation. Default = "days".
silent: Boolean switch to suppress any (non-critical) warnings and messages. Default = FALSE.
optional.inputs: Any optional inputs compatible with the extract function in terra.

Author

Karsten Donnay and Andrew M. Linke.

Details

For details on different input parameters, please refer to the detailed documentation in geomerge.

References

Andrew M. Linke, Karsten Donnay. (2017). "Scale Variability Misclassification: The Impact of Spatial Resolution on Effect Estimates in the Geographic Analysis of Foreign Aid and Conflict." Paper presented at the International Studies Association Annual Meeting, February 22-25 2017, Baltimore.