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Public Rights of Way Progress

County Parishes RoWs LTotal Ldesignation Lprow_ref GIS Update
Cambridgeshire 234 4101 3222 km 1409 km 43% 796 km 24% 2019‑04‑12 5m
Cornwall 213 6576 4425 km 479 km 10% 7 km 0% 2019‑08‑31 3w
Derbyshire 278 9845 5211 km 4033 km 77% 401 km 7% 2019‑06‑18 3m
Devon 426 6590 5007 km 3584 km 71% 3454 km 68% 2019‑06‑21 3m
East Riding of Yorkshire 171 1838 1624 km 702 km 43% 35 km 2% 2018‑02‑02 19m
East Sussex 107 7865 3184 km 1065 km 33% 302 km 9% 2019‑04‑06 5m
Essex 314 9957 6400 km 1354 km 21% 324 km 5% 2019‑05‑17 4m
Gloucestershire 266 10008 5510 km 1502 km 27% 193 km 3% 2018‑08‑01 13m
Hampshire 273 7295 4596 km 3890 km 84% 472 km 10% 2018‑12‑18 9m
Herefordshire 246 4556 3479 km 1120 km 32% 457 km 13% 2018‑07‑02 14m
Hertfordshire 137 5502 3154 km 2279 km 72% 1668 km 52% 2018‑11‑21 10m
Isle of Wight 20 1438 856 km 862 km 100% 861 km 100% 2017‑07‑21 2y
Kent 62 9706 6883 km 2299 km 33% 1092 km 15% 2017‑11‑01 22m
Norfolk 546 5799 3850 km 3266 km 84% 3258 km 84% 2019‑06‑13 3m
Oxfordshire 322 5988 4232 km 2063 km 48% 639 km 15% 2019‑02‑21 7m
Somerset 341 9810 6147 km 5659 km 92% 5567 km 90% 2019‑07‑29 7w
Suffolk 484 10427 5736 km 2240 km 39% 2011 km 35% 2019‑07‑09 2m
Warwickshire 18 3318 2839 km 1966 km 69% 950 km 33% 2019‑06‑21 3m
Worcestershire 198 15692 4590 km 2341 km 51% 1396 km 30% 2018‑07‑13 14m

Note that the "Ldesignation" lengths are only approximate (and will normally be an over-estimate) as the tool does not check precise parishes for ways with a designation tag but no prow_ref tag. Consequently, it includes any OSM ways of this type that fall within the rectangular boundaing box of each parish, rather than just those that are contained within the parish boundaries.

About this tool

This tool takes information about Public Rights of Way from four sources and flags up possible errors / omissions / things to check. Currently only a handful of counties are available, but hopefully more will be added in due course. The data sources are:

  1. Official GIS data from County Councils. Many councils now have digital versions of the legal 'Definitive Map' document they are obliged to maintain. Many have made their data files available fir re-use under a suitable licence (see my open data page). Vector routes, path numbers, designations, lengths and bounding boxes can be extracted automatically from data files. I've started using the files from Barry Cornelius's rowmaps for this, as Barry has already done the hard work in converting the myriad of different formats from the councils into a standard KML format. Updates to this data depend on how frequently the corresponding council provides updates. I would like to have new data for ecah county at least once a year, but this isn't always available.
  2. Volunteer-Mapped data from OpenStreetMap. Path numbers, designations, lengths, bounding boxes, last update details, etc. can be extracted automatically on a parish by parish basis using the XAPI. The tool will extract all ways with a prow_ref=* tag within the parish's bounding box. The data from OSM is updated on a rolling basis with each parish getting an update roughly once every couple of weeks. There is a button at the bottom of each parish page to request a quicker update — which will usually be within half-an-hour.
  3. Definitive Statements. These are written documents providing textural descriptions of each Public Right of Way. Some councils have only paper records, but many now have digital versions. Sometimes these are unstructured formatted text documents (and so data needs to be manually extracted) but other councils have databases or spreadsheets (which allow automatic extraction of route numbers and statuses.
  4. Manual classification of OSM completion level. This would be entered by tool users, after comparing the official data with the current mapping in OSM.

I've got scripts to do the extraction from first two sources set up, but I currently have to initiate the updates manually. I can do the third and fourth behind the scenes, but eventually the plan is to have a public Web interface.

With the data the tool can then flag up issues such as:

The tool is currently under development, so various key bits of functionality are not implemented yet. For details see the Known Issues and To Do List.

Suggested uses for OSM Mapping

However, please do not use the PRoW GIS data alone to map routes in OSM. The data may not be completely accurate or well-aligned, and it is important that we capture the physical presence and accessibility of routes on the ground too. Simply copying the Council's GIS data into OSM adds very little to the map. Correctly mapping a path with the condition of the surface, adjacent hedges, gates and stiles is much more useful. See also my advice for routes not following the definitive line.

Adding new authorities

I intend to add more areas as and when I have time to do so. The main constraints though are having access to the data and it being available for re-use under a suitable licence for use in OpenStreetMap. The basic requirements are:

For my own use (and for anyone else who's interested) I've written a set of import instructions outlining the process of adding a new county to the tool.

It is also useful if the authority makes available its Definitive Statements, List of Streets and a list of Traffic Regulation Orders affecting Public Rights of Way. See my Council PRoW Open Data page for an incomplete list of what is available from each authority.