these web pages
KML 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.
I have transformed the ESRI shape file into a KML file.
I have converted this KML file into the basic format that is used by this web site for all authorities. For each public right of way, this basic format has the name of the authority (City of Portsmouth), a unique number within the authority for the public right of way, the name or number of the parish/community, the name or number of the public right of way, the type of the public right of way (i.e., footpath, bridleway, ...) and any additional information about the public right of way that I've obtained from the data supplied by the authority. Here is a link to the converted KML file for City of Portsmouth.
This KML file has been augmented with additional information. For each public right of way, the augmented format also includes its length (in miles), the longitude and latitude of its first point, the longitude and latitude of its last point, the eastings and northings of its first point and the eastings and northings of its last point. Here is a link to the augmented KML file for City of Portsmouth.
This web site also provides information about the public rights of way of City of Portsmouth in GeoJSON format.