Casablanca’s Medina Buildings Monitored During Tunnel Construction
SPECTRA GEOSPATIAL

Casablanca, Morrocco; February 2020, Vibrations during the construction of a new 1,890-meter tunnel adjacent to Casablanca’s Old Medina, the 250-year-old section of the famed Moroccan city, challenged the stability of its historically important buildings.

To monitor in real time the effects on the Medina’s aging buildings and to confrm that the construction work meets all engineering standards and guidelines, ETAFAT, a geospatial information acquisition and processing company, used the Nikon XF Total Station to perform more than 100 daily inspections. The ETAFAT team relied on optical targets placed on building facades whose coordinates were determined by forced centering to complete the inspections. According to ETAFAT engineers, the Nikon XF 1″ with its fast autofocus function, saved considerable feld time.

The Nikon XF enabled very fast collection of highly accurate observations throughout the monitoring and control of the planimetric and altimetric locations of the structure.

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