Conversion of Symbols from OS Data
The following is a list of suggested tags for symbols shown on old OS mapping such as the New Popular Edition mapping, (available as a background layer in JOSM and Potlatch)
The advice given below is also generally applicable to Seventh Series maps.
- 1 Points of Interest
- 2 Notes on conversion of specfic datatypes
Points of Interest
- Church -> amenity=church building=church if able to idnetify.
- Pipeline (surface) -> man_made=pipeline
- Guide Post->
- Mile Post->
- Mile stone->
- Boundary Stone->
- Boundary Post->
- Youth Hostel ->
- antquity-> historic=* appropriate to charcter of antiqiuity
- Telephone kiosk -> amenity=phone
- Glasshouses -> building=glasshouse
- Benchmark -> man_made=survey_pointsurvey_point=benchmark
- Buildings -> building=* appropriate to character of use. NB Ground survey is strongly recomended to confirm existence.
- Pump ->
- Well -> man_made=well - Note wells are frequently removed/cease to be water source.
- Post Offices ->
- Pubs -> amenity=pub - Will be typically marked as P.H or B.H, Ground survey is strongly recomended, as many pubs shown on 1st Series no longer trade.
- lake-> natural=water
- bridge-> Tag bridge=yes on relevant way.
- tidal limit ->
- hwm ->
- lwm ->
- cliff natural=cliff
- fording point -> highway=ford on way crossing the river.
- ferry -> route=ferry
- sand/dune -> natural=sand ( See also natural=beach )
- triangulation ref -> man_made=survey_point
- open pit->
- power line-> power=line for the line
- power line-> power=tower for the towers
- pipeline-> man_made=pipeline oneway=yes
- Hi Voltage power lines -> power=line
- Pylons -> power=tower
- glasshouse-> building=glasshouse
- bus station -> amenity=bus_station
- youth hostel -> tourism=hostel
- national trust ->
- Radio transmission tower -> man_made=tower
- Church -> amenity=place_of_worship religion=christian
- with spire amenity=place_of_worship religion=christian spire=yes
- with tower -> amenity=place_of_worship religion=christian tower=yes
- Windpump -> man_made=windpump
- Windmill -> man_made=windmill disused=*
- Lighthouse -> man_made=lighthouse, See also lifecycle tags.
- phone box -> amenity=telephone operator=*
- Post office -> amenity=post_office
- Public House-> amenity=pub ; NB. See also Lifecycle tags, Many pubs in the UK have closed in recent years, and a ground survey to confirm the current status of many of the pubs marked on earlier surveys and mapping is very highly recomended.
- Mile stone ->
- Mile post ->
- town hall -> building=* on the building outline. use name=* or place=* as appropriate
- club house -> building=* on the building outline. Use name=* or place=* as appropriate
- roman site -> historic=archaeological_site
- antiquity -> historic=archaeological_site
- battlefield -> historic=battlefield
Notes on conversion of specfic datatypes
Roads marked on NPE, can be mapped through appropriate use of highway=*. Typically Trunk routes map to the trunk, other A roads to primary and B roads to secondary tags respectively.
In terms of tertiary roads (i.e non B roads) and unclassified minor roads there is ongoing discussion on how to tag these. Although highway=road exists, it should be used as a last resort, not a catch-all.
Be careful about numbering the Roads from older maps (like NPE).
Footpaths and tracks
DO NOT trace footpaths and minor tracks from old maps, because:
- In respect of the NPE maps the rights of way shown are not defintive.
- Footpaths and minor tracks can vary considerably over the 60-70 years since the survey on which these are based was undertaken. (in some cases longer)
For railways and stations that are still active use railway=* as appropriate.
Generally appropriate conversions for railway infrastructure
- railway (tunnel) -> railway=* tunnel=yes on relevant way
- railway (viaduct) -> railway=* bridge=yes on relevant way
- railway (open station) -> railway=station
- railway (principal station) -> railway=station on way - use building=railway_station as appropriate for the station building itself.
- railway level crossing -> railway=level crossing or railway=crossing depending on character.
- railway (embankment) -> railway=* embankment=yes on appropriate way
- railway (cutting) -> railway=* cutting=yes on appropriate way.
- railway (bridges) -> bridge=yes on relevant way for over/under bridge.
- railway (narrow gauge) -> railway=narrow_gauge
- railway (mineral) -> railway=* as appropriate to the character of the line.
Former rail infrastructure
For the line/route of disused railways, use railway=disused (tracks still exist albeit overgrown) or railway=abandoned(tracks lifted) as appropriate. railway=abandoned will render at zoom14-18 in mapnik
To record previous railway usage, tag as railway:historic=* alongside current use.
For disused/closed stations use railway:historic=station or railway:historic=station_site unless you can confirm that the station is STILL extant in terms of buildings on the ground. railway=station in combination with disused=yes will also render in mapnik.
In general waterways shown on NPE can be mapped to items covered by the waterway=* tag.
In terms of waterways, which since NPE have become disused or abandoned, the following is recommended. (It should be noted however that a 'disused' waterway such as a canal may not necessarily be impassable or unnavigable, although attempts at navigation are not encouraged.)
- Canals and waterways no longer in use for boats, but mostly intact and 'wet'- waterway=* as appropriate, with additional tags indicating disused status and lack of access.
- Canals and waterways no longer in use for boats, largely 'dry' or merely 'damp' and substantially impassable, waterway=abandoned.
- canal -> waterway=canal
- aqueduct-> waterway=canal bridge=yes
- lock-> waterway=lock_gate or lock=*(on way)
Waterway:historic=* can also be used to record past waterway use, provided there is evidence of the former use still extant (confirmed bu survey.)
On new efforts (preferably confirmed by survey), Lifecycle prefix should in most cases be used.
Bridges, tunnels, cuttings and embankments
There is currently a discussion under way concerning causeways, and on cuttings with respect to minor tracks and paths.
Although these conversions are given, it is generally advised to use more recent aerial photography (such as Bing), or ground survey to determine the most recent land use.
- Parkland ->
- woodland -> landuse=forest unless can be shown to be natural=wood
- brushwood ->
- orchard -> landuse=orchard
- Heathland -> natural=heath
- Moorland -> natural=moor
- Furze ->
- Marsh -> natural=wetlandwetland=marsh
- Reeds-> natural=wetlandwetland=reed
- Quarry-> landuse=quarry
- wood -> landuse=forest See notes for tag for exact usage.
- wood-> natural=wood
- orchard -> (landuse=orchard (see also landuse=forest}
- marsh -> natural=wetland wetland=marsh
- rough pasture landuse=farm (See also other Landuse=*) see also natural=heath
- parkland ->
Land parcel boundaries
DO NOT MAP from Old OS.
Land 'parcelling' in the UK is complex, and as such the exact parcelling of land shown on the OS map only reflects the situation as shown at the date of the map concerned. Mapping land parcels is better done by reference to more recent sources (OS Opendata) or to arieal photos (Bing).
DO NOT MAP from Old OS.
There are have been at least 3 major restructurings (and plenty of minor boudnary changes) of Local Government since the production of the maps concerned, and the availability of current OS OpenData Boundary Line data, makes mapping of boundaries from older maps redundant.