What is mean sea level in survey?

It is also used in aviation, where some heights are recorded and reported with respect to mean sea level (MSL) (contrast with flight level), and in the atmospheric sciences, and land surveying. An alternative is to base height measurements on an ellipsoid of the entire Earth, which is what systems such as GPS do. read more

Mean Sea Level (MSL) is a tidal datum which is computed by the Center for Operational Oceanographic Products and Services (CO-OPS), as part of the National Tidal Datum Epoch (NTDE) based on data collected over a 19-year tide cycle. read more

With the mean sea level on Indian coasts expected to rise by up to 80 cm by year 2100, the Environment Ministry is initiating a study to record the impact of black elemental carbon, emitted due to the combustion of fossil fuels, on the amount of glacial melt in the Indian Himalayas. read more

Sea level, or 'mean sea level' as it is sometimes known, the average height of ocean's. Nov 2013 is there a mean sea level taken at some point on the earth that everything else survey grade gps takes into account geoid. read more