Found the following significant warnings:
  Rd warning: CompactStratification-class.Rd:19: missing link ‘SpatialPixels-class’
  Rd warning: CompactStratification-class.Rd:21: missing link ‘SpatialPoints-class’
  Rd warning: CompactStratification-class.Rd:33: missing link ‘SpatialPixels-class’
  Rd warning: CompactStratification-class.Rd:34: missing link ‘SpatialPixelsDataFrame-class’
  Rd warning: CompactStratificationEqualArea-class.Rd:16: missing link ‘SpatialPixels-class’
  Rd warning: CompactStratificationEqualArea-class.Rd:18: missing link ‘SpatialPoints-class’
  Rd warning: CompactStratificationPriorPoints-class.Rd:16: missing link ‘SpatialPoints-class’
  Rd warning: CompactStratificationPriorPoints-class.Rd:17: missing link ‘SpatialPixels-class’
  Rd warning: CompactStratificationPriorPoints-class.Rd:19: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPattern-class.Rd:19: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPattern-class.Rd:26: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPatternCentroids-class.Rd:15: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPatternPriorPoints-class.Rd:17: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPatternPurposive-class.Rd:16: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPatternRandom-class.Rd:16: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPatternRandomComposite-class.Rd:19: missing link ‘SpatialPoints-class’
  Rd warning: SamplingPatternRandomComposite-class.Rd:32: missing link ‘SpatialPointsDataFrame-class’
  Rd warning: SamplingPatternRandomSamplingUnits-class.Rd:16: missing link ‘SpatialPoints-class’
  Rd warning: stratify-methods.Rd:26: missing link ‘SpatialPixels-class’
  Rd warning: stratify-methods.Rd:26: missing link ‘SpatialGrid-class’
  Rd warning: stratify-methods.Rd:26: missing link ‘SpatialPolygons-class’
  Rd warning: stratify-methods.Rd:28: missing link ‘SpatialPoints-class’
  Rd warning: stratify-methods.Rd:31: missing link ‘SpatialPolygons-class’
  Rd warning: stratify-methods.Rd:32: missing link ‘SpatialPolygons-class’
See ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/spcosa.Rcheck/00install.out’ for details.