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93
\item{x = "Spatial"}{ sample in the bbox of \code{x} }
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94
\item{x = "Line"}{ sample on a line }
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98
\item{x = "SpatialPolygons"}{ sample in an SpatialPolygons object; sampling
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99
takes place over all Polygons objects present, use subsetting to vary
101
101
\item{x = "SpatialGrid"}{ sample in an SpatialGrid object }
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102
\item{x = "SpatialPixels"}{ sample in an SpatialPixels object }