USGSGage.Rd
This class retrieves data for a USGS gage.
get_comid()
Looks up the COMID for this gage
This method looks up the COMID for the gage and sets the comid attribute. It does not return the COMID. It returns this object for chaining. The gage's id, latitude, and longitude attributes must be set before running this. latitude and longitude can be set manually, or by running get_data(). Can be error prone near stream junctions. If you have the means to get a reliable COMID for a gage, do so - in this method, we look up the stream segment by long/lat using nhdPlusTools.