Historic England

Conservation area

There is a problem

• start-date column must be in YYYY-MM-DD format

Gyde House

• reference: 8923
• name: Gyde House
• geometry: MULTIPOLYGON (((-2.195008 51.792028,-2.194961 51.791999,-2.194838 51.791987,-2.194630 51.791989,-2.194635 51.791923,-2.194625 51.791848,-2.194339 51.791511,-2.193567 51.790650,-2.193308 51.790580,-2.193392 51.790476,-2.193177 51.790402,-2.192960 51.790309,-2.191726 51.789728,-2.191663 51.789815,-2.191635 51.789821,-2.191550 51.789917,-2.191476 51.789975,-2.191387 51.790143,-2.191073 51.790568,-2.190806 51.790915,-2.190584 51.791181,-2.190600 51.791190,-2.190596 51.791195,-2.190748 51.791275,-2.191364 51.791580,-2.192434 51.792074,-2.192384 51.792150,-2.192332 51.792252,-2.192325 51.792294,-2.192893 51.792416,-2.193030 51.792452,-2.193189 51.792517,-2.193256 51.792533,-2.193451 51.792561,-2.193847 51.792556,-2.194903 51.792361,-2.194938 51.792332,-2.195008 51.792028)))
• point: POINT (-2.192736 51.791299)
• notes: No Appraisal document. No documents
• entry-date: 2025-04-01
• start-date:

  start-date must be a real date

How to fix this issue

Your dataset is missing the start-date column.

The Conservation area guidance explains how to fix the issue:

start-date

The date the validity of the record starts, written in YYYY-MM-DD format. Usually, this will be the same as the designation date. If anything about the conservation area has changed, for example, the boundary, it should be the date of that change.

Example:

1984-04-25

With dates, some data is better than no data, so:

• 1984 is fine
• 1984-04 is better
• 1984-04-25 is brilliant

How to improve Historic England’s data

1. Fix the errors indicated
2. Use the check service to make sure the data meets the standard
3. Publish the updated data on the endpoint URL