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Changes in Earth's volume
Earth volume dimensions are related to extraction and global changes - earthquakes, volcano eruptions and glacier thaw. Earth volume and size changes are investigated by high-class geodesy specialists. Data for change records are received both globally and locally from satellite pictures and terrain models.
Earth change assessment is essential in everyday survey process when survey is attached to a particular coordinate system. Metrum carries out instrumental surveys and uses distance research methods to find out changes in order to produce 3D terrain models