1. A geographical region or territory that is being systematically examined, measured, or investigated
The area under survey includes three counties and spans approximately 500 square miles.
A área em levantamento inclui três condados e abrange aproximadamente 500 milhas quadradas.
2. In surveying and mapping, a parcel of land being measured and documented for official records
The engineers marked the boundaries of the area under survey before beginning the topographical study.
Os engenheiros marcaram os limites da área em levantamento antes de iniciar o estudo topográfico.