TYPES OF WEATHER OBSERVATION SOURCES
LAND SURFACE- ASOS/AWOS MARINE SURFACE- C-MAN SOUNDING- RADIOSONDE/DOPPLER AIRCRAFT- AIREP/PIREP SATELLITE
ISOBAR
LINES OF CONSTANT PRESSURE
CONTOUR LINES
LINES OF CONSTANT ELAVATION
ISOTHERM
LINES OF EQUAL PRESSURE
ISOTACH
LINES OF EQUAL WIND SPEED
ISOHUME
LINES OF EQUAL HUMIDITY
ISODROSOTHERM
LINES OF EQUAL DEWPOINT