.gdalWriteFormats: no visible global function definition for
  ‘gdalDrivers’
aiObsEx: no visible global function definition for ‘readGDAL’
aiObsEx: no visible global function definition for ‘txtProgressBar’
aiObsEx: no visible global function definition for ‘setTxtProgressBar’
aiObsMe: no visible global function definition for ‘txtProgressBar’
aiObsMe: no visible global function definition for ‘readGDAL’
aiObsMe: no visible global function definition for ‘setTxtProgressBar’
assessment: no visible global function definition for ‘writeGDAL’
assessment: no visible global function definition for ‘readGDAL’
batchPetHgsm: no visible global function definition for ‘readGDAL’
batchPetHgsm: no visible global function definition for ‘writeGDAL’
editr2dRfile : canReadRgf: no visible global function definition for
  ‘readGDAL’
editr2dRfile: no visible global function definition for ‘write.table’
monitoring: no visible global function definition for ‘writeGDAL’
monitoring: no visible global function definition for ‘readGDAL’
r2dRplot: no visible global function definition for ‘layout’
r2dRplot: no visible global function definition for ‘readGDAL’
r2dRplot: no visible global function definition for ‘image’
r2dRplot: no visible global function definition for ‘title’
r2dRplot: no visible global function definition for ‘density’
r2dRplot: no visible global function definition for ‘hist’
r2dRplot: no visible global function definition for ‘boxplot’
r2dRplot: no visible global function definition for ‘barplot’
r2dRplot: no visible global function definition for ‘layout.show’
r2dRplot: no visible global function definition for ‘spplot’
r2dRplot: no visible global function definition for ‘axis.Date’
r2dRplot: no visible global function definition for ‘rect’
r2dRplot: no visible global function definition for ‘lines’
r2dRplot: no visible global function definition for ‘abline’
rasterStack: no visible global function definition for ‘GDALinfo’
rasterStack: no visible global function definition for ‘txtProgressBar’
rasterStack: no visible global function definition for ‘GDAL.open’
rasterStack: no visible global function definition for ‘GDAL.close’
rasterStack: no visible global function definition for
  ‘setTxtProgressBar’
rasterStack: no visible global function definition for ‘write.table’
readr2dRfile: no visible global function definition for ‘GDALinfo’
regStepDF: no visible global function definition for ‘na.omit’
regStepDF: no visible global function definition for ‘cor’
regStepDF: no visible global function definition for ‘pf’
regStepDF: no visible global function definition for ‘pt’
regStepRaster: no visible global function definition for ‘GDALinfo’
regStepRaster: no visible global function definition for
  ‘txtProgressBar’
regStepRaster: no visible global function definition for ‘write.table’
regStepRaster: no visible global function definition for
  ‘setTxtProgressBar’
regStepRaster: no visible global function definition for ‘read.table’
regStepRaster: no visible global function definition for ‘readGDAL’
regStepRaster: no visible global function definition for ‘writeGDAL’
rgf.plot: no visible global function definition for ‘barplot’
rgf.plot: no visible global function definition for ‘boxplot’
rgf.read: no visible global function definition for ‘read.table’
rgf.summarize: no visible global function definition for
  ‘txtProgressBar’
rgf.summarize: no visible global function definition for ‘readGDAL’
rgf.summarize: no visible global function definition for ‘density’
rgf.summarize: no visible global function definition for ‘boxplot’
rgf.summarize: no visible global function definition for
  ‘setTxtProgressBar’
rgf.summary: no visible global function definition for ‘txtProgressBar’
rgf.summary: no visible global function definition for ‘readGDAL’
rgf.summary: no visible global function definition for
  ‘setTxtProgressBar’
rgf.summary: no visible global function definition for ‘writeGDAL’
rgf.summary: no visible global function definition for ‘GDALinfo’
rgf.summary: no visible global function definition for ‘GDAL.open’
rgf.summary: no visible global function definition for ‘GDAL.close’
rgf.summary: no visible global function definition for ‘rowMedians’
rgf.summary: no visible global function definition for ‘rowRanges’
rgf.summary: no visible global function definition for ‘rowSds’
rgf.summary: no visible global function definition for ‘rowVars’
rgf.summary: no visible global function definition for ‘rowCounts’
rgf.when: no visible global function definition for ‘readGDAL’
rgf.when: no visible global function definition for ‘txtProgressBar’
rgf.when: no visible global function definition for ‘setTxtProgressBar’
rueObsEx: no visible global function definition for ‘readGDAL’
rueObsEx: no visible global function definition for ‘txtProgressBar’
rueObsEx: no visible global function definition for ‘setTxtProgressBar’
rueObsMe: no visible global function definition for ‘txtProgressBar’
rueObsMe: no visible global function definition for ‘readGDAL’
rueObsMe: no visible global function definition for ‘setTxtProgressBar’
showInfo: no visible global function definition for ‘head’
solarRad: no visible global function definition for ‘is.projected’
solarRad: no visible global function definition for ‘coordinates’
solarRad12M: no visible global function definition for ‘writeGDAL’
summarize: no visible global function definition for ‘writeGDAL’
Undefined global functions or variables:
  GDAL.close GDAL.open GDALinfo abline axis.Date barplot boxplot
  coordinates cor density gdalDrivers head hist image is.projected
  layout layout.show lines na.omit pf pt read.table readGDAL rect
  rowCounts rowMedians rowRanges rowSds rowVars setTxtProgressBar
  spplot title txtProgressBar write.table writeGDAL
Consider adding
  importFrom("graphics", "abline", "axis.Date", "barplot", "boxplot",
             "hist", "image", "layout", "layout.show", "lines", "rect",
             "title")
  importFrom("stats", "cor", "density", "na.omit", "pf", "pt")
  importFrom("utils", "head", "read.table", "setTxtProgressBar",
             "txtProgressBar", "write.table")
to your NAMESPACE file.