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An object of class 'SpatialPolygonsDataFrame' that was created from a shapefile detailing boundaries of the level 3 ecoregion borders of Oregon.
The format is: Formal class 'SpatialPointsDataFrame' [package "sp"].
data(OrEcoLevel3) spplot(OrEcoLevel3, zcol="US_L3NAME", col.regions=rainbow(9, s=0.75))
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