Thanks Nick - yes indeed, I can understand why the few existing building outline polygons may have to be dumped, but why instead choose a potentially confusing representation (5x5 m box that could overlap several adjacent "buildings" as mapped on MasterMap, and suggests an extent) over a clear unambiguous one (a point)? The point shows immediately that no attempt is being made to define extent or curtilage, while still tying the listed status to a structure mapped on MasterMap. And it is much easier to create/edit.
I can see this causing plenty of confusion in real-world casework, so it would be useful to know the thought processes behind the decision, and whether there is any room for discussion or change.
Yours
Crispin
________________________________
From: Issues related to Historic Environment Records on behalf of Nick Boldrini
Sent: Mon 23/08/2010 09:01
To: [log in to unmask]
Subject: Re: Statement on Spatial Depictions of Heritage Assets - message on behalf of English Heritage Heritage Protection Department
I was assuming Crispin was asking more whats the point of swapping from one arbitrary representation ( a point) to another (a 5 x 5 area) at all, not querying why it was 5 x 5.
And if that's not what he meant, I would like to know the answer! Seems like a waste of resources.
From: Issues related to Historic Environment Records [mailto:[log in to unmask]] On Behalf Of David Evans
Sent: 23 August 2010 08:52
To: [log in to unmask]
Subject: Re: Statement on Spatial Depictions of Heritage Assets - message on behalf of English Heritage Heritage Protection Department
5m x 5m is actually quite large, think barn , chest tomb, milestone, finger post.
David Evans
Historic Environment Record Officer
Planning and Environment
Planning, Transportation & Strategic Environment
PO Box 2081
The Council Offices, Castle Street
Thornbury
South Gloucestershire
BS35 9BP
Phone: 01454 863649
fax: 01454 864473
________________________________
From: Issues related to Historic Environment Records [mailto:[log in to unmask]] On Behalf Of Crispin Flower
Sent: 20 August 2010 16:59
To: [log in to unmask]
Subject: Re: Statement on Spatial Depictions of Heritage Assets - message on behalf of English Heritage Heritage Protection Department
Hi Bruce
Are we allowed to ask "why..." ? (to the tiny polygons bit).
Yours
Crispin
From: Issues related to Historic Environment Records [mailto:[log in to unmask]] On Behalf Of HOWARD, Bruce
Sent: 20 August 2010 16:46
To: [log in to unmask]
Subject: Statement on Spatial Depictions of Heritage Assets - message on behalf of English Heritage Heritage Protection Department
Dear List member,
Please see below a statement issued on behalf of English Heritage's Heritage Protection Department:
"Statement on Spatial Depictions of Heritage Assets
English Heritage is in the process of undertaking a programme of work designed to reform the way in which the currently separate designation systems of Listing, Scheduling, Protected Wrecks and the two Registers of Parks and Gardens and Battlefields are created, managed and stored.
A new database is being created called the Unified Designation System (UDS), which will not only support the new unified business process but it will also contain all the individual designation records and make these available via the online Heritage List for England. Each record will contain both a textual description together with a mapped indication of the location of the asset. The UDS and the Heritage List for England will also contain World Heritage Site records. The UDS is planned to go live in early 2011.
Currently the various types of designation are spatially depicted by a mixture of points, polygons and multi-part polygons. Each is stored as a separate dataset in the current Geographical Information System (GIS). To ease software development and future maintenance the decision has been taken to move all these depictions to a single dataset in the new system.
To enable this to happen it has been agreed to convert all Listed Building entries currently depicted as points into tiny polygons of size 5m x 5m. There are, however, a number of Listed Buildings which are already depicted as larger-scale polygons, some with multiple parts. It is not possible to migrate these across to the new system as they do not have any statutory validity and they might also be mistakenly taken to indicate curtilage. It has therefore been decided that these depictions will also be converted into tiny polygons.
The polygons with multiple parts will be gradually converted over the coming months, with the remaining larger-scale polygons and the points converted all together when the new system goes live.
For Scheduled Monuments, Protected Wrecks, Registered Battlefields and Registered Parks and Gardens the polygons will remain as the spatial definition of the designated area.
The different asset types will continue to be available to all users as separate datasets via the NMR Data Download Area."
Regards
Bruce
***********************************************************************************
Bruce Howard
Heritage Information Partnerships Supervisor (HER Liaison)
English Heritage
National Monuments Record
Kemble Drive
Swindon
SN2 2GZ
Tel: 01793 41 4880 Fax: 01793 414444
e-mail: [log in to unmask]
mobile: 07979 241 770
Online guidance for Historic Environment Records: www.ifp-plus.info <http://www.ifp-plus.info/>
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P Please consider the environment - do you really need to print this email?
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