fortify problem with sp namespace

[seancarmody]

This may be a bit obscure, but I have found a problem using fortify for a SpatialPolygonsDataFrame when sp has not been loaded. While that may seem an unlikely scenario, it came up for me when trying to plot map data which loaded from files created using save. Here is an artificial reproducible example of the error

bx <- rgeos::readWKT("POLYGON ((112.5 -44, 112.5 -9, 154 -9, 154 -44, + 112.5 -44))")
bx <- as(bx, "SpatialPolygonsDataFrame")
fortify(bx, region="dummy")
# Error in fortify.SpatialPolygonsDataFrame(bx, region = "dummy") : 
#  could not find function "polygons"

If I run library(sp) first the error goes away, but should fortify use sp::polygons rather than polygons to avoid the error altogether?

[hadley]

This sounds like a great feature/horrible bug, but unfortunately we don't currently have the development bandwidth to support it/fix it. If you'd like to submit a pull request that implements this feature/fixes this bug, please follow the instructions in the development vignette.

[seancarmody]

Pull request submitted.