Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 139
name: THE BIRMINGHAM (SITE OF THE HILL, 2 WOOD LANE, HANDSWORTH WOOD) TPO 1975
tree-preservation-order: undefined
TPO 139
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.911013 52.515801,-1.910247 52.516647,-1.909222 52.516483,-1.908895 52.517006,-1.909365 52.517293,-1.909675 52.517385,-1.910923 52.516041,-1.911114 52.515815,-1.911013 52.515801)))
point: POINT (-1.909697 52.516816)
notes: The shaded area represents those properties which fall within the outline of a Tree Preservation Order. To precisely identify trees protected by the Order, you can request a copy of the tree preservation order at the following link.
organisation
entry-date: 2025-11-30
start-date
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.