These guidance notes provide guidance on the appearance of maps created from Strategi and on the data itself. They pick out some major aspects of Strategi, as described in the Ordnance Survey's Strategi User Guide, but also highlight several issues that are not adequately explained in the User Guide.
More detail on some aspects of Strategi can be found in the Strategi User Guide which can be downloaded from here. The User Guide also includes details of the use of NTF, DXF, SHP and MID/MIF to supply the data.
Strategi is a regionally based dataset useful for activities such as decision making in planning. It is a geometrically structured 1:250,000 scale vector database that defines the real world geographic objects as point and line features. Each feature consists of geometric and attribute data. Coordinate resolution is 1 metre.
Strategi is used within Digimap to create Regional View maps.
This is a list of all the valid feature codes used within Strategi, in numerical order of feature code. The list contains a description of each feature, its feature type, its feature code and a list of attributes which can be associated with that feature. Please note that the list of attributes is different in several cases from the list of attributes published by Ordnance Survey in their Strategi User Guide. The list here is based on our experience of using the data.
Note that all features listed below have the DE attribute, which details when the feature was last amended.
Features codes, or layer names, in Strategi DXF data are prefixed by the characters "G806". For more information on DXF data download the user guide.
This list of feature codes can also be viewed arranged by category.
Feature code | Description | Type | Attributes | Notes |
---|---|---|---|---|
5107 | Road Distance Marker (Primary & amp; A) | Point | FC, OR | |
5108 | Road Distance Marker (Motorway) | Point | FC, OR | |
5109 | Dual Junction graphic text divider line | Point | FC | |
5110 | Coastline, natural | Line | FC | High Water Mark |
5111 | Coastline, man-made | Line | FC | |
5115 | Sea, below mean high water | Point | FC, RU | |
5120 | Foreshore sand - outer limit | Line | FC | |
5121 | Foreshore sand - area seed | Point | FC, RB | |
5122 | Foreshore non-sand - outer limit | Line | FC | |
5123 | Foreshore non-sand - area seed | Point | FC, RB | |
5140 | Lighthouse, in use | Point | FC, GS, FM | |
5141 | Lightship | Point | FC, GS, FM | |
5142 | Lighthouse, disused | Point | FC, GS, FM | |
5200 | Unspecified node | Point | FC | |
5211 | Primary river - source | Line | FC, FM | |
5212 | Primary river - middle | Line | FC, FM | |
5213 | Primary river - lower | Line | FC, FM | |
5221 | Secondary river - source | Line | FC, FM | |
5222 | Secondary river - middle | Line | FC, FM | |
5230 | Small river | Line | FC | |
5240 | Canal | Line | FC, FM | |
5241 | Canal tunnel | Line | FC, FM | |
5242 | Canal - over other feature | Line | FC, FM | |
5243 | Canal Tunnel (end symbol) | Point | FC, OR | |
5250 | Inland water body - outer limit | Line | FC | |
5251 | Inland water body - area seed | Point | FC, RB | |
5300 | Motorway (under construction) | Line | FC, NU | |
5301 | Motorway (under construction, over other feature) | Line | FC, NU | |
5302 | Primary route, dual carriageway (under construction) | Line | FC, NU | |
5303 | Primary route, dual carriageway (under construction, over) | Line | FC, NU | |
5304 | Primary route, single carriageway (under construction) | Line | FC, NU | |
5305 | Primary route, single carriageway (under construction, over) | Line | FC, NU | |
5306 | A Road, dual carriageway (under construction) | Line | FC, NU | |
5307 | A Road, dual carriageway (under construction, over) | Line | FC, NU | |
5308 | A Road, single carriageway (under construction) | Line | FC, NU | |
5309 | A Road, single carriageway (under construction, over) | Line | FC, NU | |
5310 | Motorway | Line | FC, NU | |
5311 | Motorway - planned | Line | FC, NU | |
5312 | Motorway - over other feature | Line | FC, NU | |
5313 | Motorway tunnel | Line | FC, NU | |
5314 | Road tunnel (end symbol) | Line | FC, OR | |
5320 | Primary route dual carriageway | Line | FC, NU | |
5321 | Primary route dual carriageway - planned | Line | FC, NU | |
5322 | Primary route dual carriageway - over other feature | Line | FC, NU | |
5323 | Primary route single carriageway | Line | FC, NU | |
5324 | Primary route single carriageway - planned | Line | FC, NU | |
5325 | Primary route single carriageway - over other feature | Line | FC, NU | |
5326 | Narrow primary route | Line | FC, NU | |
5327 | Narrow primary route - over other feature | Line | FC, NU | |
5330 | A road dual carriageway | Line | FC, NU | |
5331 | A road dual carriageway - planned | Line | FC, NU | |
5332 | A road dual carriageway - over other feature | Line | FC, NU | |
5333 | A road single carriageway | Line | FC, NU | |
5334 | A road single carriageway - planned | Line | FC, NU | |
5335 | A road single carriageway - over other feature | Line | FC, NU | |
5336 | Narrow A road | Line | FC, NU | |
5337 | Narrow A road- over other feature | Line | FC, NU | |
5340 | B road dual carriageway | Line | FC, NU | |
5342 | B road dual carriageway - over other feature | Line | FC, NU | |
5343 | B road single carriageway | Line | FC, NU | |
5345 | B road single carriageway - over other feature | Line | FC, NU | |
5346 | Narrow Broad | Line | FC, NU | |
5347 | Narrow B road- over other feature | Line | FC, NU | |
5350 | Minor road | Line | FC | |
5351 | Minor road -over other feature | Line | FC | |
5353 | Minor road tunnel | Line | FC, FM | |
5355 | Primary route dual carriageway - roundabout | Point | FC | |
5356 | A road dual carriageway - roundabout | Point | FC | |
5357 | B road dual carriageway - roundabout | Point | FC | |
5358 | A road tunnel | Line | FC, NU | |
5359 | B road tunnel | Line | FC, NU | |
5360 | Service Station - full access | Point | FC, OR, GS, NU, UE, LO, | |
5361 | Service Station - limited access | Point | FC, GS, FM, UE, LO, RJ, RM, RL, RQ, RW, RZ, OR | |
5370 | Motorway junction - full access | Point | GS, FC, NU | |
5371 | Motorway junction - limited access | Point | FC, NU, GS, RJ, RM, RL, RQ, RW, RZ, DE | |
5372 | Motorway junction - under construction | Point | GS, FC, NU | |
5373 | Primary route tunnel | Line | FC, NU | |
5374 | Minor road - roundabout | Point | FC | |
5375 | Primary route single carriageway - roundabout | Point | FC | |
5376 | A road single carriageway - roundabout | Point | FC | |
5377 | B road single carriageway - roundabout | Point | FC | |
5378 | Multi-level junction - under construction | Point | FC, GS | |
5379 | Multi-level junction | Point | FC, GS | |
5380 | Gradient 1 in 7 or steeper | Point | FC, OR, GS | Not shown on minor roads. |
5381 | Roundabout under construction | Point | FC | |
5382 | Toll | Point | FC, OR | |
5384 | Other track or road | Line | FC | |
5385 | Other track or road - over other feature | Line | FC | |
5390 | Vehicular ferry | Line | FC, FE, FF, FI, FP, FR, FT,GS |
|
5393 | Ferry route link | Line | FC, GS, FE, FF, FI, FP, FR, FT |
|
5397 | 100km accentuated grid line | Line | FC | |
5398 | 10km grid line | Line | FC | |
5405 | Minor Road under 4 metres wide | Line | FC | |
5406 | Minor Road under 4 metres wide (over other feature) | Line | FC | |
5407 | Minor Road under 4 metres wide tunnel | Line | FC, FM | |
5408 | Roundabout (minor road under 4 metres wide tunnel) | Line | FC | |
5413 | Town attribute point | Point | CM or UN, FC, FM, LO | |
5416 | Village attribute point | Point | CM or UN, FC, FM, LO | |
5419 | Landmark attribute point | Point | CM or UN, FC, FM, LO | |
5420 | Large urban area - outer limit | Line | FC | |
5421 |
Large urban area - seed |
Point | FC, RB | |
5422 | Small urban area - outer limit | Line | FC | |
5423 | Small urban area - seed | Point | FC, RB | |
5427 | City attribute point | Point | CM or UN, FC, FM, LO | |
5490 | Inland waterbody - inner limit | Line | FC | |
5491 | Forest - inner limit | Line | FC | |
5492 | Large urban area - inner limit | Line | FC | |
5493 | Small urban area - inner limit | Line | FC | |
5494 | Foreshore sand - inner limit | Line | FC | |
5495 | Foreshore non-sand - inner limit | Line | FC | |
5510 | Standard gauge railway | Line | FC | |
5511 | Standard gauge railway - over other feature | Line | FC | |
5512 | Narrow gauge railway | Line | FC | |
5513 | Narrow gauge railway - over other feature | Line | FC | |
5514 | Railway tunnel | Line | FC | |
5515 | Railway tunnel (end symbol) | Point | FC, OR | |
5520 | Railway station | Point | FC, GS, FM | |
5530 | Level crossing on classified road | Point | FC, GS, OR | |
5531 | Level crossing on unclassified road | Point | FC, GS, OR | |
5610 | Forest - outer limit | Line | FC | |
5611 | Forest - area seed | Point | FC, RB | |
5612 | Marsh | Point | FC | |
5620 | Geographical area | Point | FC, FM, RU | Moors, woodland, headland, fens, commons, plains, hills, lakes, lochs and reservoirs and so on. |
5621 | Island area attribute point | Point | FC, FM, RB | |
5710 | National area boundary | Line | FC | |
5715 | National area seed | Point | FC, FM, RU | |
5720 | County boundary | Line | FC | |
5725 | County - area seed | Point | FC, CM, RU | |
5730 | District Boundary | Line | FC | |
5733 | District primary attribute point | Point | FC, DN, CM | |
5734 | Administrative detached attribute point | Point | FC, DN and CM or UN, RB | |
5740 | Unitary Authority Boundary | Line | FC | |
5744 | Unitary Authority primary attribute point | Point | FC, UN | |
5750 | Associated area boundary | Line | FC | |
5805 | Camping and caravanning combined site | Point | FC, GS | |
5806 | Park and ride | Point | FC, GS, UE | |
5810 | Roman road | Line | FC, FM | |
5812 | Antiquity line detail | Line | FC, FM | Dyke, wall and so on |
5815 | Hill-fort | Point | FC, GS, FM | |
5816 | Battlefield | Point | FC, GS, FM | |
5820 | National or forest park boundary | Line | FC | |
5821 | National or forest park area seed | Point | FC, FM, RB | |
5825 | National trail, long distance path | Line | FC, FM | |
5835 | Television or radio mast | Point | FC, GS | |
5837 | Telephone dot | Point | FC | |
5838 | Landmark/antiquity dot | Point | FC, GS, FM | |
5840 | Airport without customs facilities | Point | GS, FC, FM, AO | |
5841 | Airport with customs facilities | Point | AN, GS FC, FM, CM or UN |
|
5843 | Wind powered generator | Point | FC, GS | |
5844 | Windmill | Point | FC, GS | |
5845 | Heliport | Point | AO, FC GS, FM |
|
5847 | Public Telephone | Point | FC | |
5849 | Motoring organisation telephone | Point | FC | |
5851 | Theme park (open to the public) | Point | FC, GS, FM | |
5860 | Abbey, cathedral, priory (open to the public) | Point | FC, GS, FM, OW | |
5861 | Camp site | Point | FC, GS | |
5862 | Caravan site | Point | FC, GS | |
5863 | Golf course | Point | FC, GS | |
5864 | Museum (open to the public) | Point | FC, GS, FM, OW | |
5865 | Picnic site | Point | FC, GS | |
5866 | Tourist information centre (open all year) | Point | FC, GS | |
5867 | Country park (open to the public) | Point | FC, GS, FM | |
5868 | Youth hostel | Point | FC, GS | |
5869 | Nature or forest trail | Point | FC, GS | |
5870 | Zoo (open to the public) | Point | FC, GS, FM | |
5871 | Preserved railway | Point | FC, GS, FM | |
5873 | Craft centre (open to the public) | Point | FC, GS, FM | |
5874 | Wildlife centre (open to the public) | Point | FC, GS, FM | |
5875 | Aquarium (open to the public) | Point | FC, GS, FM | |
5876 | Cave (open to the public) | Point | FC, GS | |
5877 | Castle (open to the public) | Point | FC, GS, FM, OW | |
5878 | Historic house (open to the public) | Point | FC, GS, FM, OW | |
5879 | Motor racing circuit | Point | FC, GS, FM | |
5880 | Nature reserve | Point | FC, GS, FM, OW | |
5881 | Viewpoint (limited) | Point | FC, GS | |
5882 | Viewpoint (360 degrees) | Point | FC, GS | |
5883 | Other tourist attraction (open to the public) | Point | FC, GS, FM, OW | |
5884 | Ski slope | Point | FC, GS | |
5885 | Racecourse | Point | FC, GS, FM | |
5886 | Garden (open to the public) | Point | FC, GS, FM, OW | |
5887 | Ferry boat | Point | FC | |
5888 | Ferry hovercraft | Point | FC | |
5889 | Tourist information centre (seasonal) | Point | FC, GS | |
5890 | Ferry box outline | Point | FC | |
5892 | Ferry catamaran | Point | FC |
Feature code |
Text category description | Notes |
---|---|---|
5006 | Non Primary Route Destination Town | |
5016 | Other Graphic Text | Includes airport without customs facilities, heliport, hotel, oil refinery and so on. |
5020 | Water feature name | River, lake, loch, reservoir, bay, sea, ocean and so on |
5025 | Primary Route Destination City | |
5026 | Non Primary Destination City | |
5031 | Motorway number | |
5032 | Primary route number | |
5033 | A road number | |
5034 | B road number | |
5036 | Motorway Road Distance Marker | |
5037 | Primary & amp; A Road Distance Marker | |
5038 | Toll | |
5039 | Ferry Annotation | |
5040 | Non-primary route village | |
5041 | Primary route destination town | |
5042 | Motorway junction number full access | |
5043 | Motorway junction number limited access | |
5044 | Tourist feature | |
5045 | Long Distance Footpath | |
5046 | National Park / Forest Park name | |
5049 | Primary Road Destination Village | |
5060 | Geographical area names, parks, moors, woodlands, commons, moors, plains | |
5061 | Large hills and ranges | |
5062 | Hills, Islands & amp; Rock features | |
5081 | Roman antiquities (AD43 - AD420) | |
5082 | Non-Roman antiquities |
Attribute codes used above are detailed in the table below. The "possible values" column explains the possible values that the attribute can take. For example, if the AN attribute is present it always has a value of 0,whereas the FM attribute can contain any text.
Code | Description | Possible values | Notes |
---|---|---|---|
AN | Airport, international | 0 | This attribute is not used consistently in the data. |
AO | Airport, other | 0 | This attribute is not used consistently in the data. |
CM | County name | text | Administrative County Name, e.g. Kent County. |
DE | DATE | 0 or date, e.g. 20001128 | The date of last amendment |
DN | District name | text | Administrative area district name, e.g. Thanet District. |
FC | Feature code | 0000-9999 | Contains the numeric feature code of the feature. For example, 5330 for an A road, dual carriageway. |
FE | Ferry access | text | Shows method of vehicular access to ferry, for example roll-on/roll-off. |
FF | Ferry from | text - starts with "Route from:" | Shows ferry departure location. Interchangeable with FT attribute. |
FI | Ferry time | text | Shows normal crossing time in minutes. |
FM | Feature name | text | For example Birmingham, River Severn |
FP | Ferry type | text | Shows the type of ferry, for example ship, catamaran. |
FR | Ferry restrictions | text | For example all year, seasonal. |
FT | Ferry to | text - starts with "Route to:" | Shows ferry destination. Interchangeable with FF attribute. |
GS | GIS | 0 or unique number | Intelligence unique identifier. There can be none (null, or 0), one (e.g. 33596) or more than one number per record (e.g. 4587, 5986, 9758) |
LO | Location | 0 - 5 | Identifies location. Values are:
|
NU | Road number | text | For example M27. |
OR | Orientation | 4 digit number | Used to describe the orientation of a point feature from grid east, anticlockwise in tenths of a degree. If absent the feature is not deemed to have an orientation. |
OW | Owner | text | Property owner, e.g. English Heritage. |
RB | Representative point, for bounded area | 0 | Present only for an area bounded by line features, for example a lake. |
RJ | Restriction North | text | Restricted junction - north bound, e.g. "no access", "no exit". |
RL | Restriction South | text | Restricted junction - southbound, e.g. "no access", "no exit". |
RM | Restriction East | text | Restricted junction - eastbound, e.g. "no access", "no exit". |
RQ | Restriction West | text | Restricted junction - westbound, e.g. "no access to M6 southbound", "no exit". |
RU | Representative point, for an unbounded area | 0 | Present only for an area not bounded by line features, for example South Downs. |
RW | Restriction Clockwise | text | Restricted junction - clockwise, e.g. "no access to A34 northbound". |
RZ | Restriction Anticlockwise | text | Restricted junction - anticlockwise, e.g. "no access", "no exit". |
TX | Cartographic text | text | Contains text intended for cartographic display. |
UE | Usage | 0 - 6 | Indicates status, values:
|
UN | Unitary authority name | text | Unitary authority in which feature is located, for example City of Southampton. Either this attribute or the CM attribute is used. |
In Strategi, human settlements (cities, towns and villages) are divided by importance into a number of categories. In common with other area features, settlements are depicted with a line boundary (Feature Codes 5420, 5422, 5492,5493), and carry a seed point with Feature Code 5421 or 5423. This seed point only has the "representative point bounded" attribute (RB).
In addition, each settlement has a node point (Feature Codes 5413, 5416,5427) which has feature name (FM) and county name (CM, UN) attributes.
One of the settlement categories is "primary route destination". This category includes selected places of major traffic importance, such as cities, towns and major river crossings, as defined by the Department of Transport, Local Government and the Regions (DTLR), formally DETR.
Previous versions of Strategi included satellite node points to represent a settlement where it crosses a tile boundary. Strategi is no longer delivered as tiles by the Ordnance Survey, so these satellite node points are not now present.
Area features in Strategi, such as areas of woodland, water, foreshore and urban development, are portrayed by line features which define the limits of the area in question. Within each area defined by these lines is a seedpoint with a corresponding feature code.
The line features which form the limits of an area feature are given feature codes indicating whether they are the outer limit or inner limit of such a classified area. For example, the outer limit of large urban areas are bounded by a line which has a Feature Code of 5420; "islands" within this outer limit which are not classed as part of the urban area are bounded by a line with a feature code of 5492, representing the inner limit.
Each seed point within an area feature carries an attribute indicating whether the area feature is bounded by line features or not. Most area features (woods, lakes, urban areas etc) are bounded by line features and carry the corresponding RB attribute. Some seed points are not bounded by line features and therefore carry the RU attribute, such as sea areas (Feature Code 5115) and named geographical areas (seed point Feature Code 5620).
Strategi contains cartographic text which is designed for display and plotting, and completely separate attribute text which is designed for text processing and analysis. All text which is included as cartographic text is also transferred as attribute text. Some text which is included as attribute text is not included as cartographic text.
Text is generally positioned horizontal to a grid. The general exception to this rule is that text referring to a linear feature such as a river is positioned at one or more points along the feature to which it refers, aligned along that feature.
A name may be split into two or more pieces of cartographic text to improve display. For example, the name Derwent Water is contained in two pieces of cartographic text; "Derwent" and "Water" which are positioned one above the other.
All cartographic text is associated with a point location, given as x and y National Grid coordinates. The position of the text relative to the given point is indicated by a text position code indicating whether the text should be placed above, below or beside the point and whether it should be centred Porto the left or right. This code allows the text to be positioned correctly in relation to the feature which it refers to. Use of the text position code is described in more detail in the Strategi User Guide.
The font and size in mm of the text is transferred which enables the user to recreate the appearance of the text.
Strategi contains cartographic text which is designed for display and plotting, and completely separate attribute text which is designed for text processing and analysis. All text which is included as cartographic text is also transferred as attribute text. Some text which is included as attribute text is not included as cartographic text.
Names of features are also included in the data as attribute text. This attribute text is transferred as the Feature Name (FM) attribute of the features to which they refer. Occasionally, the value of the Feature Name attribute is apiece of descriptive text rather than a proper name. This is commonly the case for railway stations and hill forts, but is also occasionally true for castles, and other distinctive buildings. For some features (e.g. ferries, districts) attribute text appears not as a Feature Name attribute but as an attribute specific to that feature. These are described below where appropriate.
Line features: only some line features carry a feature name (FM)attribute. The features concerned are:
Point features: only some point features carry a feature name (FM)attribute. The features concerned are:
Feature Name attributes are usually spelt out in full. Common words may be abbreviated, using the following abbreviations:
Abbreviation | Full text |
---|---|
Br | Bridge |
Cas | Castle |
Ho | House |
Junc | Junction |
R | River |
Resr,Resrs | Reservoir,Reservoirs |
St | Saint |
Sta | Station |
Where a line feature representing a road, railway or canal crosses other features on a bridge, it is given a special feature code, indicating "over other feature". There are "over" feature codes for each category of road as well as for railways and canals. Only the uppermost feature is given an "over" feature code. Therefore, the section of a feature which passes above a road (for example) is given a separate feature code to the rest of that feature. The extent of the feature coded as "over" is the full length of the bridge carrying the feature.
All standard gauge railways are included in Strategi. Most of the associated infrastructure of stations, tunnels and level crossings is included. However, for clarity, some minor stations (Feature Code 5520) are omitted. Narrow gauge railways are included where space permits.
Roundabouts are given a feature code that depends on the highest category of road that uses the roundabout. For example, a roundabout where a dual carriageway B road meets a minor road has a Feature Code of 5357(a B road dual carriageway roundabout), whereas a roundabout where that dual carriageway B road meets a primary route has a Feature Code of 5375 (a primary route roundabout). For A roads, B roads and primary routes the feature codes distinguish between roundabouts on single and dual carriageways.
A multi-level junction (Feature Codes 5378, 5379) is a road junction where roads cross each other using bridges and underpasses instead of intersections. These Feature Codes are used on all classes of roads, except motorways. Motorway junctions have their own Feature Codes (5370-5372) and use these Feature Codes, not those for multi-level junctions. Where a multi-level junction includes a roundabout, it will have the Feature Code of a multi-level junction, not the Feature Code of a roundabout.
The category of a road can be deduced independently from two pieces of information: the Feature Code, and the Number (NU) attribute. The NU attribute contains the text of the name of the road (for example "B3047", or "A27(M)"). Occasionally, these two pieces of information disagree. In these cases, the Feature Code is more consistently correct.
Vehicular ferry routes are shown as lines with a Feature Code of 5390. These lines end where they reach the coastline.
Feature Code 5393 (ferry route link) is applied to a line which connects the road network with the point at which a ferry reaches the coastline. This provides connectivity between road and ferry networks to facilitate transport network analysis.
The attributes of the ferry route link are identical to the ferry route to which they are related.
Unspecified nodes (Feature Code 5200) are used to record topological information. They do not have any attributes. They are positioned at end points and junctions of line features.