Guidance

Probable shallow coal mine workings metadata

Published 9 October 2014

1. Description

1.1 Keywords

Probable Shallow Workings, Coal, Mining, Underground, Energy, Mining Report, Ground Stability

1.2 Abstract

Probable shallow coal mine workings contain locations and estimated extents of probable shallow underground workings for which no recorded plan exists, but where it is likely that workable coal at shallow depths has been mined before records were kept. The data has been estimated from available mining records by qualified mining surveyors.

1.3 Purpose

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

1.4 Supplementary information

Since 1872 there has been a law that requires all coal mine operators to deposit working plans of the mine with the Government following the cessation of operations. Prior to this date the plans were often destroyed or kept in private ownership.

This layer was constructed to show areas where the Coal Authority believe that there is evidence of past coal mine workings but have no formal abandonment plan for those workings, such as an adjacent mine plan may have the annotation ‘Ancient workings’, located by development and/or site investigation, the workings may even be shown on an estate/surface plan.

This dataset does not therefore constitute a complete dataset and omissions of recorded and unrecorded shallow workings do not constitute virgin un-worked ground; standing advice must prevail.

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: ProbableShallowWorkings

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 here.

If you need any additional advice please contact the Customer Service Team on +44 (0) 345 762 6848 or email customerservice@coal.gov.uk.

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, 200 Lichfield Lane, Mansfield, Nottinghamshire NG18 4RG, England. Telephone +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

2. Spatial

2.1 Horizontal coordinate system

Projected coordinate system name: British_National_Grid

Geographic coordinate system name: GCS_OSGB_1936

2.2 Details

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	In projected or local coordinates
West: -2.094319	Left: 393739.658742
East: -2.079946	Right: 394692.250000
North: 53.469310	Top: 396983.649563
South: 53.457808	Bottom: 395705.349900

Vertical

Minimum elevation: 0.000000 Maximum elevation: 0.000000

2.8 ProbableShallowWorkings

ESRI feature type: Simple

Geometry type: Polygon

Topology: FALSE

Feature count: 12474

Spatial Index: TRUE

Linear referencing: TRUE

2.9 SDTS description

Feature class: SDTS feature type, feature count

ProbableWorkings: G-polygon, 12474

3. Attributes

3.1 Details for ProbableShallowWorkings

Type of object: Feature Class

Number of records: 12474

3.2 FID

Alias: FID

Data type: OID

Width: 4

Precision: 0

Scale: 0

Definition: Internal feature number.

Definition Source: ESRI

3.3 Shape

Alias: Shape

Data type: Geometry

Width: 0

Precision: 0

Scale: 0

Definition: Feature geometry.

Definition Source: ESRI

3.4 OBJECTID

Alias: OBJECTID

Data type: Number

Width: 9

3.5 NAME

Alias: NAME

Data type: String

Definition:

The local name for the Coal Mining Reporting Area

Width: 80

3.6 FEATURE_TYPE

Alias: FEATURE_TYPE

Data type: String

Definition: The coal mining feature type

Width: 50

3.7 HYPERLINK

Alias: HYPERLINK

Data type: String

Definition: Web URL for further 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