GIS software, OS OpenData, INSPIRE polygons and UK map viewers. 5 tools, in our suggested starting order (how we order).
ordnancesurvey.co.uk
Free (verified)
Ordnance Survey's free datasets for Great Britain (mapping, boundaries, terrain, rivers, postcodes) under the Open Government Licence.
Best for Surveyors needing free GB base data.
Cost Free under OGL (stated on page).
Visit siteSource · checked 15 Oct 2026
use-land-property-data.service.gov.uk
Free (verified)
Indicative positions of registered freehold titles in England and Wales, updated monthly, GML.
Best for Land surveyors checking indicative title extents.
Cost Free under OGL (GOV.UK guidance).
Visit siteSource · checked 15 Oct 2026
gridmarks.co.uk
Free (verified)
Free UK survey map: grid references, E/N and lat/long marks, spreadsheet import, offline council-area maps.
Best for UK surveyors marking and revisiting site locations.
Cost 'Free · no login' stated on site; site notes a possible future Pro plan.
Visit siteSource · checked 15 Oct 2026
osdatahub.os.uk
Free tier (verified)
Ordnance Survey's portal for data downloads and APIs; OpenData, Premium and Public Sector plans.
Best for Surveyors and developers using OS data.
Cost OpenData plan free; Premium plan includes £1,000 of free API transactions a month (stated on page).
Visit siteSource · checked 15 Oct 2026
qgis.org
Free (verified)
Free and open-source desktop GIS.
Best for Anyone working with UK spatial data.
Cost Free and open source, GNU GPLv2 (stated on site).
Visit siteSource · checked 15 Oct 2026
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