"within an area" is correct and usable in written English.
You can use it when referring to a specific geographical area or area of focus. For example, "The changes proposed will have an impact within our local area."
The bill would also give permission for councils within an area to streamline their governance.
What appeared to be a covered body was visible within an area cordoned off by authorities.
Stonehenge was built within an area that was already special to Mesolithic and Neolithic people.
"When geographic names are used, they will not locate a site within an area any smaller than 100 square miles".
He said that rocket-propelled grenades had been fired from within an area the red shirts occupied.
Within an area, the PoAs are chosen according to predefined preferences.
This requires the knowledge of the repeat times of earthquakes within an area.
There are seven test berths within an area of 2 km width in the testing field.
The craters/caverns can be found somewhere within an area of the plates (Fig. 1C0(b)).
The GaAs surface was bombarded uniformly within an area of 25 × 25 μm in the experiments.
Figure 2 Ipacketcket forwarding within an area, and affected protocol layers.
