diff --git a/DESCRIPTION b/DESCRIPTION
index 42995b1..d500b0b 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -7,8 +7,8 @@ LazyLoad: yes
 Author: Jonathan Asher Greenberg and Matteo Mattiuzzi
 Description: Wrappers for the Geospatial Data Abstraction Library (GDAL)
     Utilities.
-Version: 2.0.3.2
-Date: 2020-01-15
+Version: 2.0.3.3
+Date: 2020-05-24
 Depends:
     R (>= 2.14.0)
 Imports:
@@ -20,4 +20,4 @@ Imports:
 SystemRequirements: GDAL binaries
 BugReports: https://github.com/gearslaboratory/gdalUtils/issues
 Encoding: UTF-8
-RoxygenNote: 7.0.2
+RoxygenNote: 7.1.0
diff --git a/R/gdal_cmd_builder.R b/R/gdal_cmd_builder.R
index 6df6edb..5c4bea2 100644
--- a/R/gdal_cmd_builder.R
+++ b/R/gdal_cmd_builder.R
@@ -8,7 +8,8 @@
 #' @param parameter_order Character. The order of the parameters for the GDAL command.
 #' @param parameter_noflags Character. Parameters which do not have a flag.
 #' @param parameter_doubledash Character. Parameters which should have a double dash "--".
-#' @param parameter_noquotes Character. Parameters which should not be wrapped in quotes (vector parameters only, at present).
+#' @param parameter_named Named character. Parameters which have a double dash flag and are in key value format (e.g. '--config GDAL_CACHEMAX "30\%"')
+#' @param parameter_noquotes Character. Parameters which should not be wrapped in quotes (vector parameters only, at present). This option supersedes `parameter_named`.
 #' @param gdal_installation_id Numeric. The ID of the GDAL installation to use.  Defaults to 1.
 #' @param python_util Logical. Is the utility a python utility?  Default = FALSE.
 #' @param verbose Logical. Enable verbose execution? Default is FALSE.  
@@ -59,6 +60,10 @@
 #' 			"ot","of","mask","expand","a_srs",
 #' 			"b","mo","co",
 #' 			"src_dataset","dst_dataset")
+#' 			
+#' parameter_named <- c(
+#'      "config"
+#' )
 #' 
 #' parameter_noflags <- c("src_dataset","dst_dataset")
 #' 
@@ -67,7 +72,8 @@
 #' 	src_dataset = "input.tif",
 #' 	dst_dataset = "output.envi",
 #' 	of = "ENVI",
-#' 	strict = TRUE
+#' 	strict = TRUE, 
+#' 	config = c(GDAL_CACHEMAX = "30%")
 #' )
 #' 
 #' cmd <- gdal_cmd_builder(
@@ -75,22 +81,24 @@
 #' 			parameter_variables=parameter_variables,
 #' 			parameter_values=parameter_values,
 #' 			parameter_order=parameter_order,
-#' 			parameter_noflags=parameter_noflags)
+#' 			parameter_noflags=parameter_noflags,
+#' 			parameter_named = parameter_named)
 #' 
 #' cmd
 #' system(cmd,intern=TRUE) 
 #' }
 #' @export
 
-#TODO: additional commands
+#TODO: additional commands
 #TODO: work without parameters (executable only)
 #TODO: command aliases (e.g. for commands with a hyphen, 
-#	since R doesn't allow that in variable naming).
+#	since R doesn't allow that in variable naming).
 
 gdal_cmd_builder <- function(executable,parameter_variables=c(),
 		parameter_values=c(),parameter_order=c(),parameter_noflags=c(),
 		parameter_doubledash=c(),
 		parameter_noquotes=c(),
+		parameter_named = c(),
 		gdal_installation_id=1,
 		python_util=FALSE,
 		verbose=FALSE)
@@ -300,7 +308,7 @@ gdal_cmd_builder <- function(executable,parameter_variables=c(),
 		if(length(parameter_variables_repeatable_defined)>0)
 		{
 			parameter_variables_repeatable_strings <- sapply(parameter_variables_repeatable_defined,
-					function(X,parameter_values,parameter_doubledash)
+					function(X,parameter_values,parameter_doubledash, parameter_named)
 					{
 #						if(X == "gcp") browser()
 						
@@ -314,7 +322,16 @@ gdal_cmd_builder <- function(executable,parameter_variables=c(),
 								flag=paste("--",X," ",sep="")	
 							} else
 							{
-								flag=paste("-",X," ",sep="")
+							  if (X %in% parameter_named) {
+							    # this was introduced for options like 
+							    # '--config GDAL_CACHEMAX "30%"'. It is possible that there
+							    # are also single-dashed named options. Then this must be 
+							    # adapted.
+							    flag = paste0("--", X, " ")
+							  } else
+							  {
+							    flag=paste("-",X," ",sep="")
+							  }
 							}
 						}
 						
@@ -327,14 +344,23 @@ gdal_cmd_builder <- function(executable,parameter_variables=c(),
 									collapse=" ")			
 						} else
 						{	
-							parameter_variables_repeatable_string <- paste(
-									paste(flag,
-											qm(parameter_values[[which(names(parameter_values)==X)]]),
-											sep=""),
-									collapse=" ")
+						  if (X %in% parameter_named) 
+						  {
+						    parameter_variables_repeatable_string <- paste(
+						      paste(flag, 
+						            (names(parameter_values[[which(names(parameter_values)==X)]])),
+						            qm(parameter_values[[which(names(parameter_values)==X)]])), 
+						      collapse = " ")
+						  } else {
+						    parameter_variables_repeatable_string <- paste(
+						      paste(flag,
+						            qm(parameter_values[[which(names(parameter_values)==X)]]),
+						            sep=""),
+						      collapse=" ")
+						  }
 						}
 						return(parameter_variables_repeatable_string)
-					},parameter_values=parameter_values,parameter_doubledash=parameter_doubledash)			
+					},parameter_values=parameter_values,parameter_doubledash=parameter_doubledash, parameter_named=parameter_named)			
 		} else
 		{
 			parameter_variables_repeatable_strings <- NULL
@@ -403,4 +429,4 @@ gdal_cmd_builder <- function(executable,parameter_variables=c(),
 	
 	return(cmd)
 	
-}
\ No newline at end of file
+}
diff --git a/R/gdal_contour.R b/R/gdal_contour.R
index e826ae3..234acd7 100644
--- a/R/gdal_contour.R
+++ b/R/gdal_contour.R
@@ -17,7 +17,7 @@
 #' @param fl Character. Name one or more "fixed levels" to extract.
 #' @param nln Character. Provide a name for the output vector layer. Defaults to "contour". 
 #' @param output_Vector Logical. Return output dst_filename as a Spatial* object.  Currently only works with f="ESRI Shapefile".
-#' @param config Character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.
+#' @param config Named character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.
 #' @param ignore.full_scan Logical. If FALSE, perform a brute-force scan if other installs are not found.  Default is TRUE.
 #' @param verbose Logical. Enable verbose execution? Default is FALSE.  
 
@@ -119,7 +119,9 @@ gdal_contour <- function(
 	
 	parameter_noquotes <- unlist(parameter_variables$vector)
 	
-	parameter_doubledash <- c("config")
+	parameter_doubledash <- c()
+
+        parameter_named <- c("config")
 	
 	executable <- "gdal_contour"
 	
@@ -131,6 +133,7 @@ gdal_contour <- function(
 			parameter_noflags=parameter_noflags,
 			parameter_noquotes=parameter_noquotes,
 			parameter_doubledash=parameter_doubledash,
+                        parameter_named = parameter_named,
 			#		gdal_installation_id=gdal_chooseInstallation(hasDrivers=of))
 			gdal_installation_id=gdal_chooseInstallation())
 	
diff --git a/R/gdal_grid.R b/R/gdal_grid.R
index 2c3deca..c05cdee 100644
--- a/R/gdal_grid.R
+++ b/R/gdal_grid.R
@@ -24,7 +24,7 @@
 #' @param sql Character. "select_statement". An SQL statement to be evaluated against the datasource to produce a virtual layer of features to be processed.
 #' @param co Character. "NAME=VALUE". Passes a creation option to the output format driver. Multiple -co options may be listed. See format specific documentation for legal creation options for each format.
 #' @param q Logical. Suppress progress monitor and other non-error output.
-#' @param config Character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.
+#' @param config Named character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.
 #' @param output_Raster Logical. Return output dst_filename as a RasterBrick?
 #' @param ignore.full_scan Logical. If FALSE, perform a brute-force scan if other installs are not found.  Default is TRUE.
 #' @param verbose Logical. Enable verbose execution? Default is FALSE.  
@@ -333,7 +333,9 @@ gdal_grid <- function(
 	
 	parameter_noquotes <- unlist(parameter_variables$vector)
 	
-	parameter_doubledash <- c("config")
+	parameter_doubledash <- c()
+
+        parameter_named <- c("config")
 	
 	executable <- "gdal_grid"
 	
@@ -345,6 +347,7 @@ gdal_grid <- function(
 			parameter_noflags=parameter_noflags,
 			parameter_noquotes=parameter_noquotes,
 			parameter_doubledash=parameter_doubledash,
+                        parameter_named = parameter_named,
 			#		gdal_installation_id=gdal_chooseInstallation(hasDrivers=of))
 			gdal_installation_id=gdal_chooseInstallation())
 	
diff --git a/R/gdal_translate.R b/R/gdal_translate.R
index 1751c13..c7ad955 100644
--- a/R/gdal_translate.R
+++ b/R/gdal_translate.R
@@ -33,7 +33,7 @@
 #' @param norat Logical. (GDAL >= 1.11) Do not copy source RAT into destination dataset.
 #' @param oo Character. NAME=VALUE. (starting with GDAL 2.0) Dataset open option (format specific)
 #' @param sd_index Numeric. If the file is an HDF4 or HDF5 file, which subdataset should be returned (1 to the number of subdatasets)?  If this flag is used, src_dataset should be the filename of the multipart file.  This parameter only works if the subdataset names follow the SUBDATASET_n_NAME convention.
-#' @param config Character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.
+#' @param config Named character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.
 #' @param output_Raster Logical. Return output dst_dataset as a RasterBrick?
 #' @param ignore.full_scan Logical. If FALSE, perform a brute-force scan if other installs are not found.  Default is TRUE.
 #' @param verbose Logical. Enable verbose execution? Default is FALSE.  
@@ -182,7 +182,9 @@ gdal_translate <- function(src_dataset,dst_dataset,ot,strict,of="GTiff",
 	
 	parameter_noquotes <- c(unlist(parameter_variables$vector),"gcp","scale")
 	
-	parameter_doubledash <- c("config")
+	parameter_doubledash <- c()
+	
+	parameter_named <- c("config")
 	
 	executable <- "gdal_translate"
 #	browser()
@@ -194,6 +196,7 @@ gdal_translate <- function(src_dataset,dst_dataset,ot,strict,of="GTiff",
 			parameter_noflags=parameter_noflags,
 			parameter_noquotes=parameter_noquotes,
 			parameter_doubledash=parameter_doubledash,
+			parameter_named = parameter_named,
 			gdal_installation_id=gdal_chooseInstallation(hasDrivers=of))
 	
 	if(verbose) message(paste("GDAL command being used:",cmd))
diff --git a/R/gdalinfo.R b/R/gdalinfo.R
index 3389656..9a8f3ae 100644
--- a/R/gdalinfo.R
+++ b/R/gdalinfo.R
@@ -22,7 +22,7 @@
 #' @param formats Logical. List all raster formats supported by this GDAL build (read-only and read-write) and exit. The format support is indicated as follows: 'ro' is read-only driver; 'rw' is read or write (ie. supports CreateCopy); 'rw+' is read, write and update (ie. supports Create). A 'v' is appended for formats supporting virtual IO (/vsimem, /vsigzip, /vsizip, etc). A 's' is appended for formats supporting subdatasets. Note: The valid formats for the output of gdalwarp are formats that support the Create() method (marked as rw+), not just the CreateCopy() method.
 #' @param format Character. List detailed information about a single format driver. The format should be the short name reported in the --formats list, such as GTiff.
 #' @param optfile Character. Read the named file and substitute the contents into the commandline options list. Lines beginning with # will be ignored. Multi-word arguments may be kept together with double quotes.
-#' @param config Character. Sets the named configuration keyword to the given value, as opposed to setting them as environment variables. Some common configuration keywords are GDAL_CACHEMAX (memory used internally for caching in megabytes) and GDAL_DATA (path of the GDAL "data" directory). Individual drivers may be influenced by other configuration options.
+#' @param config Named character. Sets the named configuration keyword to the given value, as opposed to setting them as environment variables. Some common configuration keywords are GDAL_CACHEMAX (memory used internally for caching in megabytes) and GDAL_DATA (path of the GDAL "data" directory). Individual drivers may be influenced by other configuration options.
 #' @param debug Character. Control what debugging messages are emitted. A value of ON will enable all debug messages. A value of OFF will disable all debug messages. Another value will select only debug messages containing that string in the debug prefix code.
 ## @param additional_commands Character. Additional commands to pass directly to gdalinfo.
 #' @param raw_output Logical. Dump the raw output of the gdalinfo (default=TRUE). If not, attempt to return a clean list (not all parameters will be retained, at present). 
@@ -92,9 +92,9 @@ gdalinfo <- function(datasetname,json,mm,stats,
 					varnames <- c("sd")),
 			character = list(
 					varnames <- c("mdd","datasetname",
-							"format","optfile","config","debug","oo")),
+							"format","optfile","debug","oo")),
 			repeatable = list(
-					varnames <- NULL)
+					varnames <- c("config"))
 	)
 	
 	parameter_order <- c(
@@ -105,7 +105,9 @@ gdalinfo <- function(datasetname,json,mm,stats,
 	
 	parameter_noflags <- c("datasetname")
 	
-	parameter_doubledash <- c("version","formats","format","optfile","config","debug")
+	parameter_doubledash <- c("version","formats","format","optfile","debug")
+	
+	parameter_named <- c("config")
 	
 	executable <- "gdalinfo"
 	# End gdalinfo setup
@@ -116,7 +118,8 @@ gdalinfo <- function(datasetname,json,mm,stats,
 			parameter_values=parameter_values,
 			parameter_order=parameter_order,
 			parameter_noflags=parameter_noflags,
-			parameter_doubledash=parameter_doubledash)
+			parameter_doubledash=parameter_doubledash,
+			parameter_named = parameter_named)
 	
 	if(verbose) message(paste("GDAL command being used:",cmd))
 	
diff --git a/man/gdal_cmd_builder.Rd b/man/gdal_cmd_builder.Rd
index 3b764ca..9ef58b3 100644
--- a/man/gdal_cmd_builder.Rd
+++ b/man/gdal_cmd_builder.Rd
@@ -12,6 +12,7 @@ gdal_cmd_builder(
   parameter_noflags = c(),
   parameter_doubledash = c(),
   parameter_noquotes = c(),
+  parameter_named = c(),
   gdal_installation_id = 1,
   python_util = FALSE,
   verbose = FALSE
@@ -32,6 +33,8 @@ gdal_cmd_builder(
 
 \item{parameter_noquotes}{Character. Parameters which should not be wrapped in quotes (vector parameters only, at present).}
 
+\item{parameter_named}{Named character. Paramters which have a double dash flag and are in key value format (e.g. '--config GDAL_CACHEMAX "30\%"')}
+
 \item{gdal_installation_id}{Numeric. The ID of the GDAL installation to use.  Defaults to 1.}
 
 \item{python_util}{Logical. Is the utility a python utility?  Default = FALSE.}
@@ -89,6 +92,10 @@ parameter_order <- c(
 			"ot","of","mask","expand","a_srs",
 			"b","mo","co",
 			"src_dataset","dst_dataset")
+			
+parameter_named <- c(
+     "config"
+)
 
 parameter_noflags <- c("src_dataset","dst_dataset")
 
@@ -97,7 +104,8 @@ parameter_values = list(
 	src_dataset = "input.tif",
 	dst_dataset = "output.envi",
 	of = "ENVI",
-	strict = TRUE
+	strict = TRUE, 
+	config = c(GDAL_CACHEMAX = "30\%")
 )
 
 cmd <- gdal_cmd_builder(
@@ -105,7 +113,8 @@ cmd <- gdal_cmd_builder(
 			parameter_variables=parameter_variables,
 			parameter_values=parameter_values,
 			parameter_order=parameter_order,
-			parameter_noflags=parameter_noflags)
+			parameter_noflags=parameter_noflags,
+			parameter_named = parameter_named)
 
 cmd
 system(cmd,intern=TRUE) 
diff --git a/man/gdal_contour.Rd b/man/gdal_contour.Rd
index cb46a7b..f00b21f 100644
--- a/man/gdal_contour.Rd
+++ b/man/gdal_contour.Rd
@@ -56,7 +56,7 @@ gdal_contour(
 
 \item{output_Vector}{Logical. Return output dst_filename as a Spatial* object.  Currently only works with f="ESRI Shapefile".}
 
-\item{config}{Character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.}
+\item{config}{Named character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.}
 
 \item{ignore.full_scan}{Logical. If FALSE, perform a brute-force scan if other installs are not found.  Default is TRUE.}
 
diff --git a/man/gdal_grid.Rd b/man/gdal_grid.Rd
index 9aa2b35..64ec70a 100644
--- a/man/gdal_grid.Rd
+++ b/man/gdal_grid.Rd
@@ -78,7 +78,7 @@ gdal_grid(
 
 \item{q}{Logical. Suppress progress monitor and other non-error output.}
 
-\item{config}{Character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.}
+\item{config}{Named character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.}
 
 \item{output_Raster}{Logical. Return output dst_filename as a RasterBrick?}
 
diff --git a/man/gdal_translate.Rd b/man/gdal_translate.Rd
index 6cd1e59..fcbd265 100644
--- a/man/gdal_translate.Rd
+++ b/man/gdal_translate.Rd
@@ -106,7 +106,7 @@ gdal_translate(
 
 \item{sd_index}{Numeric. If the file is an HDF4 or HDF5 file, which subdataset should be returned (1 to the number of subdatasets)?  If this flag is used, src_dataset should be the filename of the multipart file.  This parameter only works if the subdataset names follow the SUBDATASET_n_NAME convention.}
 
-\item{config}{Character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.}
+\item{config}{Named character. Sets runtime configuration options for GDAL.  See https://trac.osgeo.org/gdal/wiki/ConfigOptions for more information.}
 
 \item{output_Raster}{Logical. Return output dst_dataset as a RasterBrick?}
 
diff --git a/man/gdalinfo.Rd b/man/gdalinfo.Rd
index 7db8e71..4f498f2 100644
--- a/man/gdalinfo.Rd
+++ b/man/gdalinfo.Rd
@@ -73,7 +73,7 @@ gdalinfo(
 
 \item{optfile}{Character. Read the named file and substitute the contents into the commandline options list. Lines beginning with # will be ignored. Multi-word arguments may be kept together with double quotes.}
 
-\item{config}{Character. Sets the named configuration keyword to the given value, as opposed to setting them as environment variables. Some common configuration keywords are GDAL_CACHEMAX (memory used internally for caching in megabytes) and GDAL_DATA (path of the GDAL "data" directory). Individual drivers may be influenced by other configuration options.}
+\item{config}{Named character. Sets the named configuration keyword to the given value, as opposed to setting them as environment variables. Some common configuration keywords are GDAL_CACHEMAX (memory used internally for caching in megabytes) and GDAL_DATA (path of the GDAL "data" directory). Individual drivers may be influenced by other configuration options.}
 
 \item{debug}{Character. Control what debugging messages are emitted. A value of ON will enable all debug messages. A value of OFF will disable all debug messages. Another value will select only debug messages containing that string in the debug prefix code.}