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Publicado el: 2018-02-13
Tiempo de estudio aproximado: 0 - .25 h
Incluye sonido: yes
Áreas temáticas
Geospatial
Descripción:
Aimed at surveyors and GIS professionals, this video explains the difference between active and passive control methods in surveying, and the strengths and weaknesses of each. Passive control is the traditional method of referencing positions to physical benchmarks that have known locations. Active control references positions to one or more Continuously Operating Reference Stations (CORS). These stations use continuous contact with global navigation satellite systems (GNSS/GPS) to provide a highly accurate and updated position.
Objetivos:
- Define passive and active control
- Describe strengths and weaknesses of using passive vs. active control
Palabras clave
NOAA, National Geodetic Survey, NGS, geodetic control, surveying, National Spatial Reference System, NSRS, passive control marks, Global Positioning System, GPS, Global Navigation Satellite Systems, GNSS, continuously operating reference stations, CORS