Nothing
####################################################
# SpatialDataFrame-class #
####################################################
setClassUnion(name = "SpatialDataFrame",
members = c("SpatialIndexDataFrame",
"SpatialPointsDataFrame",
"SpatialPixelsDataFrame",
#"SpatialGridDataFrame",
"SpatialPolygridDataFrame",
"SpatialPolygonsDataFrame",
"SpatialLinesDataFrame"))
is.SpatialDataFrame = function(SpatialDataFrame){
classSDF = class(SpatialDataFrame)
if (is.element(classSDF, c("SpatialIndexDataFrame",
"SpatialPointsDataFrame",
"SpatialPixelsDataFrame",
"SpatialPolygridDataFrame",
"SpatialPolygonsDataFrame",
"SpatialLinesDataFrame"))){
out = TRUE
} else {
out = FALSE
}
return(out)
}
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