The London planetree pictured below was recently topped, within the last two weeks. Topping is a poor pruning practice leading to structural and physiological problems. This does not look like pollarding and there are no overhead wires with which a full crown would have interfered.
It is a large diameter planetree, apparently healthy; with a full crown, it would provide many psychosocial and ecosystem benefits. For a live look, the tree is located off Marin on Euclid.