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| surveying reference network (MeggieBlack) | |||
| Survey Control Network (In geodesy and surveying a control network or simply control, is a set of reference-points of known geospatial coordinates. Kenny Gray) | |||
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| surveying reference network (MeggieBlack) | |||
| Survey Control Network (In geodesy and surveying a control network or simply control, is a set of reference-points of known geospatial coordinates. Kenny Gray) | |||