chch.live the canopy

The canopy

Every street and park tree the council counts, 131,940 of them standing, 2,874 marked veteran, 4,538 carrying a protection the district plan or a consent put there. And the register keeps the other half of the story: 50,861 records for the trees it felled, the ghost canopy, the kerbside gaps the file still remembers.

Standing on the register
131,940
Veterans
2,874
the oldest residents
Protected
4,538
listed or consented
Remembered felled
50,861
the ghost canopy

The notable ones, drawn

AddingtonAidanfieldAkaroaAranuiAvondaleAvonheadAvonsideBeckenhamBelfastBexleyBishopdaleBottle LakeBromleyBrooklandsBroomfieldBryndwrBurnsideBurwoodCasebrookCashmereCass BayChristchurch AirportChristchurch Central CityCliftonCorsair BayCoutts IslandCracroftDallingtonDiamond HarbourDuvauchelleEdgewareFendaltonFerrymeadGovernors BayHalswellHarewoodHeathcote ValleyHei HeiHillmortonHillsboroughHoon HayHornbyHornby SouthHuntsburyIlamIslingtonKaingaKennedys BushLe Bons BayLinwoodLittle RiverLytteltonMairehauMarshlandMcLeans IslandMerivaleMiddletonMoncks BayMount PleasantNew BrightonNorth New BrightonNorthcoteNorthwoodOkains BayOpawaOuruhiaPAPANUIParklandsPhillipstownPigeon BayPort LevyPrebbletonRedcliffsRedwoodRiccartonRichmondRichmond HillRollestonRussleySaint AlbansSaint MartinsScarboroughShirleySockburnSomerfieldSouth New BrightonSouthshoreSpencervilleSpreydonStrowanSumnerSydenhamTai Tapute-onepoto-taylors-mistakeTempletonUpper RiccartonWaimairi BeachWainoniWainuiWalthamWestmorlandWigramWoolstonYaldhurst

The 6,139 records the register marks out, the 2,874 veterans drawn bold, the protected trees fine. The other 125,801 standing trees are a pin apiece in the record; the canopy by suburb sits on each suburb’s page.

What the city is made of

The twenty-five commonest names on the register, the cherries and oaks of the garden city beside the kōwhai, tōtara and tī kōuka that were here first.

Kowhai 5,849
Yoshino Cherry 4,733
Manna Ash 4,403
Pin Oak 4,334
Ribbonwood 4,199
Silver Birch 4,061
Cabbage tree 3,241
English Oak 3,062
Totara 2,655
Ash 2,459
Red maple 2,399
Sweet Gum 2,315
Flowering Cherry 2,213
Tarata / Lemonwood 2,109
Oriental Plane 1,927
Common Lime 1,861
Scarlet Oak 1,757
Kobushi Magnolia 1,673
Upright English Oak 1,367
Kahikatea 1,352
Narrow-leaved Lacebark 1,345
Sycamore 1,327
Fastigated Hornbeam 1,252
Claret Ash 1,251
London Plane 1,208

By the register’s age class

mature 52,384
juvenile 37,820
semi-mature 36,636
veteran 2,874
unknown 2,226

Where the canopy stands

The 101 suburbs the register counts trees in, ranked, Christchurch Central City leads with 12,454 on the file. Every suburb’s own count sits on its page.

The biggest on the books

Questions, answered briefly

What is this?

The council’s tree register, every street and park tree it counts, 131,940 of them standing, filed with species, height and spread. Most are council trees on berms and in parks. The commonest names on the register are kowhai, yoshino cherry, manna ash.

What is a veteran tree?

The register’s own age class, the 2,874 trees marked Veteran are the city’s oldest residents, the big oaks and cedars and macrocarpas that were standing before the streets around them were laid out. The register does not know most trees' true ages, its planting dates bottom out at 1970, so veteran is a judgement of size and form, not a birth certificate.

What does "the ghost canopy" mean?

The register keeps the records of the trees it felled: 50,861 entries marked removed or stump. A removed record is where the file says a tree came down, the kerbside gap, the park that lost its elm. It is the register’s memory, not a promise nothing stands there now: a replacement planted last year would be a new record.

What does protection mean for a tree?

4,538 records carry a protection, a district plan listing, a resource consent condition, a subdivision covenant. A protected tree cannot be felled or heavily pruned without the council’s say; the strongest listings (District Plan Significant) are the city’s landmark trees, many of them on private land.

The record behind this

Christchurch City Council’s open data, the Tree service’s street and park tree inventory. A record is the file’s word on what stands or stood, not a fresh survey; a removed record marks where the file says a tree came down. The canopy by suburb sits on each suburb’s page; a point’s own neighbours are at /before; the parks the big trees stand in are at /parks; and the other tree record, the problems residents file about them, is counted at /problems/trees.

This page as markdown: /trees.md · the record as data: /trees.json · /trees.geojson · on the live map: /map?layer=trees.