The phrase "at its perimeter" is correct and usable in written English.
It can be used when referring to the outer boundary or edge of a physical object or area.
Example: "The fence was built at its perimeter to secure the property."
Alternatives: "along its boundary" or "on its edge".
When I revisited the hospital last year and walked its grounds, I observed that building, with guard towers and razor wire at its perimeter, and assumed it still performed the same functions it had for decades before.
It has large equestrian properties at its perimeter and 19th-century buildings at its center.
Like a traditional vignette, the whole image fades out at its perimeter, into the surrounding margin of blank canvas.
Experts are now examining trees at its perimeter to see whether any long roots are threatening its stability.
At the crest of a nearby hill, still more revelers warmed themselves by a bonfire inside a giant hedge circle as musicians dueled softly at its perimeter.
For decades, the city had quietly subsidised growth at its perimeter this way, to the tune of tens of millions of dollars.
The Japan Trench at its northern perimeter is separated from the Kurile Trench by a ridge at southern Hokkaido toward the southeast (Figure 1), and at its southern perimeter, the trench is separated from the Izu-Bonin Trench by a ridge extending eastward from Cape Inubo in central Japan (Dietz [1954]).
WHAT YOU'LL FIND This neighborhood with its center at City Hall Park and its perimeter hugging the edges of Chinatown, TriBeCa and the financial district has about 20,000 residents — double the number of a decade ago, according to the Downtown Alliance, the local business improvement district.
Like a wedding marquee battling with a stiff breeze, the structure billows and eddies, swooping down to meet the ground at three points along its perimeter, before shooting up again in improbable gymnastic leaps.
The 2.5m wide panels twist through 90 degrees from top to ground level to allow spectators to pass between them in to the stadium at any point on its perimeter.
China also levies a huge tax on imports – 24% – but a new free-trade zone in Shanghai may facilitate trade, and a number of art galleries are looking at setting up within its perimeter.
