Guidance

Mine Entry Zone of Influence Metadata

Published 9 October 2014

1. Description

1.1 Keywords

Mine Entry, Coal Mining, Zone of Influence, Underground, Mining Report, Ground Stability

1.2 Abstract

A Mine Entry with Potential Zone of Influence is the area of the ground that might be affected if subsidence of the mine entry was to occur.

1.3 Purpose

Mining and geographical data held on the National Coal Mining Database.

1.4 Supplementary Information

Each mine entry has a zone of influence buffer around the mine entry calculated from the same algorithm used in producing a ‘Mine Entry Interpretive Report’. The Zone of Influence (ZOI) highlights the area on the surface that could potentially be affected in the unlikely event a collapse was to occur. The calculation takes into account the size of the mine entry entrance, the geological ‘drift’ deposits for the area and the original source from which the mine entry was captured.

The layer shows a mathematical area, which may be affected and does not attempt to take into account the varying local geological conditions that may affect this. Where the calculated ZOI is less than 20m then a default value of 20m is used.

The National Coal Mining Database, which is based on the records held at The Coal Authority offices in Mansfield, Nottinghamshire, is updated on a regular basis. This dataset has been extracted from this dynamic database on the date stated below and therefore represents a snapshot in time.

1.5 Status of the data

Extract of data from the National Coal Mining Database Data update frequency: As needed

1.6 Time period for which the data is relevant

Date and time: 14/08/2014

Description: Dataset export from the National Coal Mining Database

1.7 Publication Information

Who created the data: The Coal Authority

Date and time: 26/09/2014

1.8 Data storage and access information

File name: MineEntryZOI

Type of data: vector digital data

Data processing environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.0(Build 2800)

1.9 Constraints on accessing and using the data

Access and use constraints: This data, service or application is provided free of charge under the terms and conditions of the Open Government Licence.

The full terms and conditions of the Open Government Licence can be viewed at: http://www.nationalarchives.gov.uk/doc/open-government-licence/

If you need any additional advice please contact the Customer Service Team on +44 (0) 345 762 6848 or at [email protected]

1.10 Details about this document

Contents last updated: 26/09/2014

1.11 Who completed this document

Louise Tipper, Information Management, The Coal Authority mailing and physical address: 200 Lichfield Lane Mansfield Nottinghamshire NG18 4RD England Phone: +44 (0) 345 762 6848

1.12 Standards used to create this document

Standard name: FGDC Content Standards for Digital Geospatial Metadata

Standard version: FGDC-STD-001-1998

Time convention used in this document: local time

Metadata profiles defining additonal information ESRI Metadata Profile: http://www.esri.com/metadata/esriprof80.html

2. Spatial Information

2.1 Horizontal coordinate system

Projected coordinate system name: British_National_Grid

Geographic coordinate system name: GCS_OSGB_1936

2.2 Map Projection Name: Transverse Mercator

Scale Factor at Central Meridian: 0.999601

Longitude of Central Meridian: -2.000000

Latitude of Projection Origin: 49.000000

False Easting: 400000.000000

False Northing: -100000.000000

2.3 Planar Coordinate Information

Planar Distance Units: meters

Coordinate Encoding Method: coordinate pair

2.4 Coordinate Representation

Abscissa Resolution: 0.000000

Ordinate Resolution: 0.000000

2.5 Geodetic Model

Horizontal Datum Name: D_OSGB_1936

Ellipsoid Name: Airy_1830

Semi-major Axis: 6377563.396000

Denominator of Flattening Ratio: 299.324965

2.6 Altitude System Definition

Resolution: 0.000100

Encoding Method: Explicit elevation coordinate included with horizontal coordinates

2.7 Bounding coordinates

Horizontal In decimal degrees

West: -5.973728

East: 1.952598

North: 58.029351

South: 50.977168

In projected or local coordinates Left: 165007.000000

Right: 633740.000000

Top: 904433.880000

Bottom: 125147.990000

Spatial data description Vector data information ESRI description

2.8 MineEntryZOI

ESRI feature type: Simple

Geometry type: Polygon

Topology: FALSE

Feature count: 171995

Spatial Index: TRUE

Linear referencing: FALSE

2.9 SDTS description

Feature class: SDTS feature type, feature count

MineEntryZOI: G-polygon, 171995

3. Attributes

3.1 Details for MineEntryZOI

Type of object: Feature Class

Number of records: 171995

3.2 Attributes

3.3 FID

Alias: FID

Data type: OID

Width: 4

Precision: 0

Scale: 0

Definition: Internal feature number.

Definition Source: ESRI

3.4 Shape

Alias: Shape

Data type: Geometry

Width: 0

Precision: 0

Scale: 0

Definition: Feature geometry.

Definition Source: ESRI

3.5 OBJECTID

Alias: OBJECTID

Data type: Number

Width: 9

3.6 FEATURE_TYPE

Alias: FEATURE_TYPE

Data type: String

Definition: The coal mining feature type

Width: 50

Alias: HYPERLINK

Data type: String

Definition: Web URL for further data information

Width: 50

3.8 SHAPE_Length

Alias: SHAPE_Length

Data type: Float

Width: 19

Number of decimals: 11

3.9 SHAPE_Area

Alias: SHAPE_Area

Data type: Float

Width: 19

Number of decimals: 11

Definition: Area of feature in internal units squared.

Definition Source: ESRI