Māori language by region (map)

I recently visited Christchurch and have been trying to get a translation for 'Te Pou Herenga Waka' which appears beside the totem outside Christchurch Council Offices. Can you help please?
Many thanks

Thank goodness for those who retained 'te reo Māori' in their iwi areas. Kia ora koutou ngā kuia ngā koroua, ngā mea kaha ki te pupuri i te mauri o 'te reo'. No reira, it is obvious by the information of the map, that where there is a huge population of Māori, the language flourishes. This is not to say that everything is fine, because it is not. Our people now need to move into a mode of 'rapua te mea ngaro', - 'look for what is lost'. With the help of the Māori speaking academics, the native speakers, trained and educated teachers of Māori, we can uplift the statistics to a level higher every year. Thanks to those tireless workers in Parliament today and yesterday, who believed in the kaupapa of retention of our cultural history and language as a people.

some people dident like to speak maori and if they did a long time ago they would ge punished