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Barry Cornelius

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GeoJSON files containing the public rights of way of City of Portsmouth

The council of City of Portsmouth provide a web page from where you can download an ESRI shape file that contains details of their public rights of way. The council also provides maps showing their public rights of way in PDF files that are available from this web page. It may be that their maps use more up-to-date information.

An authority's Definitive Map is the authoritative source of their rights of way. The details of the public rights of way network contained in an authority's data are for information only, and are an interpretation of the Definitive Map, not the Definitive Map itself, and should not be relied on for determining the position or alignment of any public right of way. For legal purposes, an authority's data does not replace their Definitive Map. And changes may have been made to the Definitive Map that are not included in their data. The authority's data contains Ordnance Survey data © Crown copyright and database right 2013. Attempting to view this data with more detail than 1:10000 may produce an inaccurate rendering of the route of a public right of way.

Although this web page says No licence specified, I've received an e-mail from the council saying that their data is released with the Open Government Licence. So it's possible for other people to use their data.

Elsewhere on this web site, there is a web page about how this web site provides the public rights of way of City of Portsmouth in KML format. That web page explains how I've augmented the basic KML with additional information.

I've converted this augmented KML into GeoJSON. Besides giving the longitudes and latitudes of the route of a public right of way, each entry in the GeoJSON also has a name and a description.
The name will be something like:
There are three parts to the name: "PO" (meaning "City of Portsmouth"), the id of the parish/community and the id of the path within the parish/community.
The description will be something like:
Fo|PO:1|0.07|Eldon Street Footpath@51|-1.09060|50.79229|-1.09060|50.79229|464193,99585|464193,99585
This gives other information about the public right of way. There is a two letter code giving its type (e.g., Fo means Footpath), a unique name, the length in miles, any additional information obtained from the data supplied by the authority (or none), the longitude of its first point, the latitude of its first point, the longitude of its last point, the latitude of its last point, the eastings and northings of its first point and the eastings and northings of its last point.

The following GeoJSON files are available:
GeoJSON file for footpaths in City of Portsmouth;
GeoJSON file for bridleways in City of Portsmouth;
GeoJSON file for restricted byways in City of Portsmouth;
GeoJSON file for byways open to all traffic in City of Portsmouth.

Because some of these GeoJSON files are large, the GeoJSON is also available in a large number of smaller files. Each smaller file has information about public rights of way that are in a square that is 0.1 degrees longitude wide and 0.1 degrees latitude high. For example, the file 10W507Fo.json contains details about the Footpaths that are partly/wholly in the square that is west and north of -1.0 degrees longitude and 50.7 degrees latitude.
Here is a link to a zip file containing all the smaller GeoJSON files for City of Portsmouth.

The latitude values for City of Portsmouth range from 50.78 to 50.85. And the longitude values range from -1.11 to -1.02.