public GeographicMap(DividedRange longitudes, DividedRange latitudes)
{
this.longitudes = longitudes;
this.latitudes = latitudes;
values = new T[latitudes.Count, longitudes.Count];
}
public HistoricalGeographicMap(GeographicMap <T>[] maps, DividedRange time)
{
this.maps = maps;
this.time = time;
}