Error in re-building vignettes:
  ...
Loading required package: XML

Attaching package: ‘XML’

The following object is masked from ‘package:tools’:

    toHTML

Loading required package: RCurl
Loading required package: bitops
Loading required package: sp
rgdal: version: 1.2-20, (SVN revision 725)
 Geospatial Data Abstraction Library extensions to R successfully loaded
 Loaded GDAL runtime: GDAL 2.2.4, released 2018/03/19
 Path to GDAL shared files: /usr/share/gdal/2.2
 GDAL binary built with GEOS: TRUE 
 Loaded PROJ.4 runtime: Rel. 5.0.1, April 1st, 2018, [PJ_VERSION: 501]
 Path to PROJ.4 shared files: (autodetected)
 Linking to sp version: 1.2-7 
Checking rgeos availability: FALSE
 	Note: when rgeos is not available, polygon geometry 	computations in maptools depend on gpclib,
 	which has a restricted licence. It is disabled by default;
 	to enable gpclib, type gpclibPermit()
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for VISIBILITY
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering VISIBILITY to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for WEATHER_CODE
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering WEATHER_CODE to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for voltage
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering voltage to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for electric_current
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering electric_current to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for TEMPERATURE
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering TEMPERATURE to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for phyto
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering phyto to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for China
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering China to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for VISIBILITY
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering VISIBILITY to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for WEATHER_CODE
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering WEATHER_CODE to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for voltage
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering voltage to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for electric_current
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering electric_current to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for TEMPERATURE
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering TEMPERATURE to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for phyto
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering phyto to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in .boundedBy(obj, bbox) :
  No valid bounding box found for China
Warning in as.SosObservationOffering.SpatialPolygons(from) :
  Cannot coerce offering China to SpatialPolygons -- no CRS given.
Warning in .local(x, y, ...) : Cannot plot NULL offering!
Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in as.SensorML.SpatialPointsDataFrame(from) :
  [as.SensorML.SpatialPointsDataFrame] No CRS from sensor description (using sosGetCRS(...), using default.
Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in as.SensorML.SpatialPointsDataFrame(from) :
  [as.SensorML.SpatialPointsDataFrame] No CRS from sensor description (using sosGetCRS(...), using default.
Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in as.SensorML.SpatialPointsDataFrame(from) :
  [as.SensorML.SpatialPointsDataFrame] No CRS from sensor description (using sosGetCRS(...), using default.
Warning in value[[3L]](cond) :
  [sosGetCRS] error was detected, probably the EPSG code 4979 is not recognized (returning NULL):Error in CRS(.initString): no arguments in initialization list

Warning in as.SensorML.SpatialPointsDataFrame(from) :
  [as.SensorML.SpatialPointsDataFrame] No CRS from sensor description (using sosGetCRS(...), using default.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'longitude' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'latitude' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'longitude' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'latitude' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'longitude' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'latitude' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'longitude' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'latitude' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'easting' to 'x'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'northing' to 'y'.
Warning in .local(obj, ...) :
  Changed coordinate name for 'altitude' to 'z'.

Error: processing vignette ‘sos4R.Rnw’ failed with diagnostics:
 chunk 62 (label = getObs0b) 
Error in as.list.default(X) : 
  no method for coercing this S4 class to a vector
Execution halted