.add_variables          Add Columns to Handle Summarize
.api_error              Handles API Errors
.check_flags            Check Flags Columns
.daily_request          Request Daily Summaries
.daily_url              Create Request URL for Daily Summaries
.drop_flags             Drop Flags Columns
.elevation_url          The GHCNd Station URL with Elevation
.extract_flag           Extract GHCNd Flags
.flags                  GHCNd Flags
.inventory_url          The GHCNd Inventory URL
.max                    Calculate Maximum
.mean                   Calculate Mean
.min                    Calculate Minimum
.missing_variables      Check Which Variables Are Absent
.s3_annual              Annual Class Constructor
.s3_anomaly             Anomaly Constructor
.s3_daily               Daily Class Constructor
.s3_monthly             Monthly Class Constructor
.s3_quarterly           Annual Quarter Constructor
.sum                    Calculate Sum
CA003076680             Daily data for Station CA003076680
USC00010655             Daily data for Station USC00010655
annual                  Calculate Annual Timseries
annual_coverage         Calculate Annual Coverage
anomaly                 Temperature Anomaly
as_daily                Cast Table to Daily
country_codes           Countries ISO Codes
coverage                Calculate Coverage of Daily Summaries
daily                   Download Daily Summaries
download_inventory      Download GHCNd Inventory File
elevation_stations      Get GHCNd Station Elevation
filter_stations         Spatial Filtering of Stations
get_countries           Download multiple countries' shapefiles from
                        geoBoundaries
get_country             Download country shapefile from geoBoundaries
monthly                 Calculate Monthly Summaries
monthly_coverage        Calculate Monthly Coverage
period_coverage         Calculate Period Coverage
plot.ghcn_annual        Plot GHCNd Timeseries
plot.ghcn_anomaly       Plot GHCN Timeseries
plot.ghcn_daily         Plot GHCNd Timeseries
plot.ghcn_monthly       Plot GHCNd Timeseries
plot.ghcn_quarterly     Plot GHCNd Timeseries
quarterly               Calculate Quarterly Timseries
remove_flagged          Remove Flagged Recrods
stations                Get GHCNd Inventory
