circlesSize: no visible global function definition for ‘bbox’
circlesSize: no visible global function definition for ‘cm’
circlesSize: no visible global function definition for ‘xinch’
discretVar: no visible global function definition for ‘classIntervals’
discretVar: no visible global function definition for ‘brewer.pal’
frameAutoSize: no visible global function definition for ‘bbox’
lgdDisplayCircles: no visible global function definition for ‘par’
lgdDisplayCircles: no visible global function definition for ‘strwidth’
lgdDisplayCircles: no visible global function definition for
  ‘strheight’
lgdDisplayCircles: no visible global function definition for ‘text’
lgdDisplayCircles: no visible global function definition for ‘symbols’
lgdDisplayCircles: no visible global function definition for ‘segments’
lgdDisplayDistr: no visible global function definition for ‘par’
lgdDisplayDistr: no visible global function definition for ‘strwidth’
lgdDisplayDistr: no visible global function definition for ‘strheight’
lgdDisplayDistr: no visible global function definition for ‘text’
lgdDisplayDistr: no visible global function definition for ‘rect’
lgdDisplayQualit: no visible global function definition for ‘par’
lgdDisplayQualit: no visible global function definition for ‘strwidth’
lgdDisplayQualit: no visible global function definition for ‘strheight’
lgdDisplayQualit: no visible global function definition for ‘text’
lgdDisplayQualit: no visible global function definition for ‘rect’
mapChoroTypo: no visible global function definition for
  ‘readShapeSpatial’
mapChoroTypo: no visible global function definition for ‘par’
mapChoroTypo: no visible global function definition for ‘layout’
mapChoroTypo: no visible global function definition for ‘lcm’
mapChoroTypo: no visible global function definition for ‘plot.new’
mapChoroTypo: no visible global function definition for ‘text’
mapChoroTypo: no visible global function definition for ‘segments’
mapChoropleth: no visible global function definition for
  ‘readShapeSpatial’
mapChoropleth: no visible global function definition for ‘par’
mapChoropleth: no visible global function definition for ‘layout’
mapChoropleth: no visible global function definition for ‘lcm’
mapChoropleth: no visible global function definition for ‘plot.new’
mapChoropleth: no visible global function definition for ‘text’
mapChoropleth: no visible global function definition for ‘segments’
mapCircles: no visible global function definition for
  ‘readShapeSpatial’
mapCircles: no visible global function definition for ‘coordinates’
mapCircles: no visible global function definition for ‘par’
mapCircles: no visible global function definition for ‘layout’
mapCircles: no visible global function definition for ‘lcm’
mapCircles: no visible global function definition for ‘plot.new’
mapCircles: no visible global function definition for ‘text’
mapCircles: no visible global function definition for ‘segments’
mapCircles: no visible global function definition for ‘symbols’
mapCirclesChoro: no visible global function definition for
  ‘readShapeSpatial’
mapCirclesChoro: no visible global function definition for
  ‘coordinates’
mapCirclesChoro: no visible global function definition for ‘par’
mapCirclesChoro: no visible global function definition for ‘layout’
mapCirclesChoro: no visible global function definition for ‘lcm’
mapCirclesChoro: no visible global function definition for ‘plot.new’
mapCirclesChoro: no visible global function definition for ‘text’
mapCirclesChoro: no visible global function definition for ‘segments’
mapCirclesChoro: no visible global function definition for ‘symbols’
mapCirclesTypo: no visible global function definition for
  ‘readShapeSpatial’
mapCirclesTypo: no visible global function definition for ‘coordinates’
mapCirclesTypo: no visible global function definition for ‘par’
mapCirclesTypo: no visible global function definition for ‘layout’
mapCirclesTypo: no visible global function definition for ‘lcm’
mapCirclesTypo: no visible global function definition for ‘plot.new’
mapCirclesTypo: no visible global function definition for ‘text’
mapCirclesTypo: no visible global function definition for ‘segments’
mapCirclesTypo: no visible global function definition for ‘symbols’
northArrowDisplay: no visible global function definition for ‘locator’
northArrowDisplay: no visible global function definition for
  ‘SpatialPolygonsRescale’
northArrowDisplay: no visible global function definition for
  ‘layout.north.arrow’
scalebarDisplay: no visible global function definition for ‘locator’
scalebarDisplay: no visible global function definition for
  ‘SpatialPolygonsRescale’
scalebarDisplay: no visible global function definition for
  ‘layout.scale.bar’
scalebarDisplay: no visible global function definition for ‘text’
typo: no visible global function definition for ‘brewer.pal’
Undefined global functions or variables:
  SpatialPolygonsRescale bbox brewer.pal classIntervals cm coordinates
  layout layout.north.arrow layout.scale.bar lcm locator par plot.new
  readShapeSpatial rect segments strheight strwidth symbols text xinch
Consider adding
  importFrom("grDevices", "cm")
  importFrom("graphics", "layout", "lcm", "locator", "par", "plot.new",
             "rect", "segments", "strheight", "strwidth", "symbols",
             "text", "xinch")
to your NAMESPACE file.