Geopoints functions

This is the list of all the functions related to Geopoints data.

`abs()`	Computes the absolute value
`acos()`	Computes the arc cosine
`append()`	Appends the given data to file
`asin()`	Computes the arc sine
`atan()`	Computes the arc tangent
`columns()`	Returns column names from a `Geopoints` or `Odb`
`cos()`	Computes the cosine
`create_geo()`	Creates a new set of `Geopoints`
`create_geo_set()`	Creates a new `Geopoints` set
`dates()`	Returns the dates from a `Geopoints`
`db_info()`	Returns the database description from a `Geopoints`
`distance()`	Computes the distances in a `Fieldset` or `Geopoints` to a reference point
`div()`	Computes the integer part of a divison
`exp()`	Computes the exponential
`file()`	Returns a file handler for the specified filename
`geo_to_grib()`	Converts `Geopoints` data to GRIB
`geo_to_kml()`	Converts `Geopoints` data to KML
`geosort()`	Sorts a `Geopoints` North to South and West to East
`grib_to_geo()`	Converts GRIB data into `Geopoints`
`intbits()`	Returns ranges of bits
`latitudes()`	Returns the latitudes of a `Fieldset` or `Geopoints`
`levels()`	Returns the levels from a `Geopoints`
`log()`	Computes the natural logarithm
`log10()`	Computes the base 10 logarithm
`longitudes()`	Returns the longitudes from a `Fieldset` or `Geopoints`
`mask()`	Generates masks for a `Fieldset` or `Geopoints`
`max()`	Maximum
`mean()`	Returns the mean of the values in a `Fieldset` or `Geopoints`
`merge()`	Merges 2 sets of `Fieldset` or `Geopoints`
`metadata()`	Returns metadata from a `Geopoints`
`min()`	Minimum
`mod()`	Computes the integer remainder of a divison
`offset()`	Offsets the locations of `Geopoints`
`polar_vector()`	Combines two 1-parameter `Geopoints` variables into polar vector style
`read()`	Reads the given file and returns a variable of the appropriate type
`remove_duplicates()`	Removes duplicates from a `Geopoints`
`remove_missing_latlons()`	Removing missing lat/lons form a `Geopoints`
`remove_missing_values()`	Removes missing values from a `Geopoints`
`set_dates()`	Sets the date column in the `Geopoints` variable.
`set_latitudes()`	Sets the latitudes in a `Fieldset` or `Geopoints`
`set_levels()`	Sets the level column in a `Geopoints`
`set_longitudes()`	Sets the longitudes in a `Fieldset` or `Geopoints`
`set_metadata()`	Sets a `Geopoints` metadata from a definition
`set_stnids()`	Sets the stnid column in a `Geopoints`
`set_times()`	Sets the time column in a `Geopoints`
`set_value2s()`	Sets the value2 column in a `Geopoints`
`set_values()`	Sets the values in a `Fieldset` or `Geopoints`
`sgn()`	Computes the sign
`sin()`	Computes the sine
`sqrt()`	Computes the square root
`stnids()`	Returns thes tation ids from a `Geopoints`
`subsample()`	Filters the points of the first `Geopoints` that exist in the second one
`sum()`	Computes the sum of the values in a `Fieldset` or `Geopoints`
`tan()`	Computes the tangent
`times()`	Returns the times from a `Geopoints`
`to_dataframe()`	Converts a `Geopoints` or `Odb` to a Pandas dataframe
`value2s()`	Returns the 2nd values column from a `Geopoints`
`value_columns()`	Returns a list of value column names for a `Geopoints`
`values()`	Returns the values from a data object
`write()`	Writes/appends the given data to file
`xy_vector()`	Combines two 1-parameter `Geopoints` variables into u/v vector style