Hi Nick,
We used to have points, lines and polys then we just polygonised everything so we could cut down on the number of layers we had to deal with. The first two were done automatically by buffering lines and points. It does mean roads and railways are just long thin polys but they're easy enough to edit and reduces the number of shape files we need to export for searches. Events are digitised as trench plans / survey areas and monuments just the most suitable poly for the 'thing' using our professional judgement. Circles for stuff we can't accurately locate - the bigger the circle the more rubbish the location!

Tim


Sent with BlackBerry Work (www.blackberry.com)
From: Nick Boldrini <[log in to unmask]>
Sent: 11 Feb 2019 16:41
To: [log in to unmask]
Subject: Creating Polygons

Hi folks

 

We have started work on polygonising our records, and having had a bit of a play need to come up with some sort of policy/manual so we have consistency. The playing phase has thrown up some things to consider, and previous experience means I am aware of some others.

 

I am aware of various guidance on this (eg MIDAS etc) , but has anyone actually written a manual on what they polygonise (and as importantly what they don’t) and why they made those distinctions, they would be willing to share so I can benefit from previous experience/pinch all your good ideas?

 

I have some ideas and it seems there is no perfect solution, there will always be trade offs, but it would be useful to get anyone elses views on this, even if its just via email if you don’t have a formal document

 

tar

 

 

best wishes

 

Nick Boldrini

Historic Environment Record Officer

Archaeology Section

Heritage, Landscapes and Design Team

Planning Service

Regeneration and Local Services

Durham County Council

County Hall

Durham

DH1 5UQ

Direct: 03000 267008

Switchboard: 03000 26 0000

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http://www.durham.gov.uk/archaeology

 

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