Auckland Mayor Phil Goff says full consultation was made with iwi and mana whenua as protesters occupy the pā site of Mataharehare where an Erebus memorial is planned.
Occupants who oppose the memorial at Auckland's Dove-Myer Robinson Park have put up signs at the Parnell site.
But Goff said "full consultation was made with Ngāti Whātua Ōrākei" over the memorial, which would pay tribute to the 237 passengers and 20 crew killed when an Air New Zealand flight crashed into Mt Erebus in Antarctica in 1979.
"Their marae is very close to the site and the iwi is in full support," Goff told RNZ.
"They have been consistently in support of the memorial on that site."
He says the protesting group, led by Māori leader Dame Rangimarie Naida Glavish, have a personal view but do not speak for Ngāti Whātua Ōrākei.
Glavish, also of Ngāti Whātua descent, says the site is culturally significant.
Glavish arrived at the occupied site just after 2pm yesterday where she sat in silence under the giant 180-year-old pōhutukawa tree, which is close to the memorial construction.
"It felt like I was sitting in the arms of my ancestors of 180-plus years ago that walked this whenua. This is Mataharehare, it is a pā," she told RNZ.
Goff says an "overwhelming majority" support the establishment of the memorial. But a Colmar Brunton poll of Waitematā and Auckland of Erebus Memorial in Mataharehare suggests otherwise.