This is the 159th most frequent Turkish word.
merkezli
Centered, based, or focused.
In this sentence, 'merkezli' describes 'haber kaynakları' (news sources), specifying their operation or focus is centered in Turkey.
Türkiye merkezli haber kaynaklarına güveniyorum.
I rely on news sources based in Turkey.
Here, 'merkezli' modifies 'şirket' (company), indicating its base or origin.
İstanbul merkezli bir şirket kurdular.
They established a company based in Istanbul.
In this context, 'merkezli' refers to the location or structure of the building, indicating it is positioned centrally.