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tiennm99
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Dong Nai, Binh Duong, Thanh Hoa and Quang Nam join the tree, and Long An gains Ben Luc and Can Giuoc, taking coverage from 5 provinces to 9 and the panorama index from 425k locations to 493k. A province outline is now simplified no more loosely than the leaves it is the union of. It is not only drawn: the district assignment clips each province's panoramas against it, and at the old tolerance the outline bulged past its own districts, crediting every panorama in that band to a district it does not sit in. That band held 571 panoramas across the tree, 2.53% of Binh Duong's. Unioning adjacent districts also leaves hairline sliver rings along shared borders, some of only three points, which turf.simplify refuses to clean. Those are dropped before the outline is simplified.