Validation - A process by which entries placed in records in an attribute data file, are checked to ensure that their values fall within the bounds expected of them and that their distribution makes sense.
Category: - GIS

Variable - A quantity or attribute in a model that can take on different values at different times
Category: - Risk

Variance - The total amount of disagreement between numbers. Variance is the sum of all values with their means subtracted and then squared, divided by the number of values less one.
Category: - GIS

Variation - The amount of change or difference from expected results
Category: - Risk

Vector - A map data structure using the point or node and the connecting segment as the basic building block for representing geographic features.
Category: - GIS

Veering - A clockwise change in wind direction; for example, from east to west through south. The opposite of a backing.
Category: - Maritime

Vertical Keel - A row of vertical plates extending along the center of the flat plate keel. It sometimes is called the center keelson.
Category: - Maritime

Very Large Crude Carriers - (VLCC) Tankers between 200,000 and 300,000 dwt.
Category: - Maritime

Vessel - Any displacement or non-displacement vehicle that uses water as a means of navigation. "bateau"
Category: - GIS

Vessel path generation - The modelling of vessel traffic paths between geographic locations
Category: - GIS