Marine GIS Data ModelÝÝÝÝÝÝÝÝÝÝÝÝÝÝÝÝÝÝÝ sampling
	Marine data is collected through a wide range of: ¸ ÝMethods ¸ ÝInstruments ¸ ÝTime scales ¸ ÝPeriodicity ¸ ÝPrecision ¸ ÝAccuracy