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Meridian™ 2

Technical Information

Sample data | User guide

Meridian 2 is supplied in two separate themes - communication and topographic - or as a combined set. Meridian 2 is supplied on CD ROM only and is available in the following : national coverage, England, Scotland and Wales.

The boundary and coastline information is included in both the communication and topographic themes.

The road network in Meridian 2 is a derived and simplified network which has been produced from the Roads database. The simplified data provides a good entry level road network with the advantage of low data volumes to reduce processing time.

Communication theme: contains a fully attributed derived and simplified road network with motorways, A and B roads and some minor roads, with DTLR names and numbers. It also includes railways and the administrative area and coastline.

Topographic theme: contains the administrative areas and coastline, developed land use areas (DLUAs), settlement names, hydrology, woodlands.

Gridded height is supplied with all of the above themes on a seperate disc.

NTF and DXF tile size is 10km by 10km, which gives 2856 tiles for national coverage. MID/MIF and Shape file formats will only be available as seamless files. The MID/MIF and Shape file formats will also have explicit polygons.

 

 

Specification

Meridian™ 2

Coverage

Great Britain, (England, Scotland and Wales)

Availability

Order by;

National Extent (GB)

Country Extent (England, Scotland or Wales)

Data source

Meridian 2 product is derived from mid- and small-scale databases. The data capture sources are:

·                Road sourced from the ROADS database and enhanced annually.

·                Railways sourced from the mid-scales database created in 1995.

·                County, district and London borough unitary authorities are sourced from Boundary-Line™, which was created in 1996 enhanced in 2001.

·                Coastline sourced from the 1:50 000 scale database created in 1999.

·                Settlements, hydrology and woodlands are sourced from the small‑scale database created in 1996.

·                Gridded height is derived from Land-Form PANORAMA® at the scale of 1:50 000 created in 1987.

 

Data structure

Vector.

Scale

Meridian 2 is supplied in a nominal 1:50 000 scale.

 

Recommended minimum to maximum scale range for viewing is 1:25 000 to 1:70 000 scale.

 

It is best viewed between 1:30 000 and 1:45 000 scale

 

Transfer format
  • BS 7567 NTF (v2.0) Level 3
  • DXF™ (AutoCAD® release 12 compatible)
  • ESRI™ Shapefile
  • MapInfo® MID/MIF

Tile size

10 km x 10km (Supply in NTF and DXF only).

 

Please note that the ESRI Shapefile and MapInfo MID/MIF file formats are only available as seamless files, not tiles.

Number of tiles in Great Britain

Great Britain

England

Scotland

Wales

2856

1499

1128

286

Communication
theme
Storage
volumes(Mb)

NTF

408

330

53

32

DXF

98.2

75.7

18.3

7.8

Shapefile

693

658

141

60.9

MID/MIF

576

453

89.1

42.5

Topographic
theme
Storage
volumes(Mb)

NTF

113

58

51

11

DXF

5.5

33.2

18.9

5.25

Shapefile

232

135.3

81

21

MID/MIF

149

85.5

53.7

53.7

Communication
& topographic
themes
Storage
volumes(Mb)

NTF

510

380

97

39

DXF

137.8

99.6

28.25

11.4

Shapefile

996.3

763.6

170

61.1

MID/MIF

665

511

114

51.3

Supply media

CD

Coordinate precision

At least 1 metre

Update interval
  • Available as resupply
  • Updates are available once every twelve months,
  • Usually released in January.
  • COU is not available

Styling

There is no symbol set for this product.

Geometry types
  • Line
  • Point
  • Annotation (text)
  • Polygons:
    • NTF and DXF – polygons are implicit, that is there is appropriate information within the data for a GIS to create polygons.
    • ESRI Shapefile and MapInfo MID/MIF – polygons are explicit, that is polygons are already created in the data with no further GIS processing required.

Coordinate reference system

British National Grid (OSGB36)

 

ESRI is a registered trademark of ESRI (UK). MapInfo is a registered trademark of MapInfo. AutoCAD is a registered trademark and DXF a trademark of Autodesk Incorporated.

Sample data

The following archives of Meridian 2 data are available for download:

meridian2shp.exe

Contents: tiles SS78, SS79, SS88, SS89
File names: ss78.E00, ss79.E00, ss88.E00, ss89.E00
Format: SHP
File size: 4.72 Mb

meridian2midmif.exe

Contents: tiles SS78, SS79, SS88, SS89
File names: ss78.MIF, ss79.MIF, ss88.MIF, ss89.MIF
Format: MID/MIF
File size: 3.08 Mb

meridian2ntf.exe

Contents: tiles SS78, SS79, SS88, SS89
File names: ss78.ntf, ss79.ntf, ss88.ntf, ss89.ntf
Format: NTF
File size: 4.36 Mb

meridian2dxf.exe

Contents: tiles SS78, SS79, SS88, SS89
File names: ss77.DXF, ss79.DXF, ss88.DXF, ss89.DXF
Format: DXF
File size: 4.21 Mb

Meridian2heightNTF.exe

Contents: tiles SS78, SS79, SS88, SS89
File names: ss78.ntf, ss79.ntf, ss88.ntf, ss89.ntf
Format: NTF
File size: 3.45 Mb

Meridian2heightshp.zip

Contents: tiles SS78, SS79, SS88, SS89
File names: ss78.shp, ss79.shp, ss88.shp, ss89.shp
Format: shp
File size: 87kb

Meridian2heightmif.exe

Contents: tiles SS78, SS79, SS88, SS89
File names: ss78.MIF, ss79.MIF, ss88.MIF, ss89.MIF
Format: MID/MIF
File size: 3.24 Mb

If you haven't downloaded or used sample data before, we recommend that you read our guidance notes.

More...

User guide

The user guide contains information on the technical specification and product specification for Meridian 2 to help you understand how to use the data.

PDF file Meridian 2 user guide (800 Kb)

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