Creates a state level map of flood analysis output by USGS gage. Gages are color coded based on maximum flood magnitude (for flood threshold = "Q2"). If the flood threshold is "NWS", points are binary coded based on flood occurrence (e.g. yes/no).
map_gage(flood_stats, date = "")
Data frame of flood analysis results, by gage.
Date of data mapped to be printed at the top of the image. This argument is used by the `time_series_map` function.
A map of USGS gages color coded by maximum flood magnitude.