For local detail surveys, tacheometers are commonly employed although the old-fashioned rectangular technique using angle prism and steel tape is still an inexpensive alternative.
2.
While considering many locations, it made detail surveys of only two places : Ekeberg, located southeast of the city center, and Fornebu, to the southwest.
3.
While considering many locations, it made detail surveys of only two places : Ekeberg, located south-east of the city center, and Fornebu, to the south-west.
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