Home LiDAR map Gwynedd Porthmadog
LiDAR map of Porthmadog
Waystone shows the bare-earth LiDAR of Porthmadog, a community in Gwynedd, at one metre per pixel. The heritage records hold 98 recorded places here: 53 Coflein records, 33 listed buildings, 9 places recorded in Wikidata, 3 scheduled monuments. On the LiDAR, most of the ground in the community lies between about 1 m and 78 m above sea level; its highest point is about 262 m. By their register titles, its scheduled monuments include 1 Roman site.
Porthmadog on the LiDAR. Bare-earth LiDAR, drawn in your browser by the RVT toolbox (the Relief Visualization Toolbox, ZRC SAZU). It opens on Combined VAT; the panel holds all seventeen of its methods, each with its settings. LiDAR: Natural Resources Wales and Welsh Government, 1 m DTM, Open Government Licence. More about this map
The Ordnance Survey six-inch map of Porthmadog, 1888–1913. The Ordnance Survey’s six-inch-to-the-mile map, second edition, surveyed between 1888 and 1913 and held by the National Library of Scotland, laid over today’s map with the paper colour removed, so the field boundaries, place names and antiquities the surveyors drew sit on the ground. More about this map
Roman roads near Porthmadog. The Roman road network compiled by the Roman Roads Research Association (Digital Britannia), with each road’s grade of evidence, and the Roman forts, camps and towns along them. More about this map
See Porthmadog with everything Waystone has
The full map lays the LiDAR under the Ordnance Survey's six-inch maps of 1843–1913, the Roman road network and the 98 recorded places in the community, with search, the sun dial, the ground probe and the cross-section tool, for all of England and Wales. Free, with nothing to install.
- County
- Gwynedd, Wales
- Area
- 16.2 km²
- Recorded places
- 98
- Height (LiDAR)
- Mostly 1–78 m above sea level; highest 262 m
- ONS code
- W04000097
Scheduled monuments and other designated sites
- Moel y Gest CampScheduled monument
- Enclosed Hut Group in Parc-y-BorthScheduled monument
- Roman Bath-House, TremadocScheduled monument
Listed buildings
- Capel Peniel
- Market Hall
- Ty Nanney
- Tremadog Manufactory
- Plas Tan-yr-allt
- Church of St Mary
- Gateway to the Church of Saint Mary
- The Cob
- Slate Wharf
- Harbour yard walls and gates to Greaves Wharf
- Church of the Most Holy Redeemer
- The Oakleys
- Harbour Restaurant and house
- Harbourside Clinic and apartments
- Portmeirion Pottery and Gifts
- Shelley memorial in garden at Plas Tan-yr-allt
- Gelli Faia
- Plas Penbwll
- Church of St John
- The Sail Loft
- Ty Toronto
- Madoc Yacht Club
- Former slate warehouse on Oakleys Wharf
- Former outbuilding of Plas Ynys Tywyn
- Bee-hive Establishment
- Madocks memorial fountain in The Park
- Masonic Hall
- Shop and Dunn & Ellis Accountants
- Bridge over drainage ditch at entrance
- Former Tremadoc Tramway bridge over drainage ditch
and 3 more on the map.
Other recorded places
- Moel-y-Gest, Round HutCoflein record
- Supermarine Spitfire V W3700Coflein record
- Porthmadog Harbour New Wharf; Snowdon WharfCoflein record
- Porthmadog War MemorialCoflein record
- Welsh Highland Heritage Railway, PorthmadogCoflein record
- Porthmadog TownCoflein record
- Inscribed Stone at St Michael and All Angels'Coflein record
- Porthmadog Railway Station: Goods ShedCoflein record
- Porthmadoc Gas WorksCoflein record
- Round HutCoflein record
- Llanerch, Round HutCoflein record
- Y Glog, Hut CircleCoflein record
- Pillbox, Glan-yr-Afon, Morfa BychanCoflein record
- Tremadog Roman Corn-DrierCoflein record
- Morfa BychanCoflein record
- Silurian Iron Ore MineCoflein record
- Mortuary Chapels, PorthmadogCoflein record
- Deserted Farmstead, Mount PleasantCoflein record
Nearest places with their own page
- Criccieth Castle6.0 km west
- Harlech Castle8.0 km south
- Bryn Cader Faner9.6 km east
Neighbouring parishes
Reading the LiDAR
The terrain model has trees, crops and buildings removed, so banks, ditches, mounds, old field systems and hollow ways show as relief. Many are modern or natural: check the records and the old Ordnance Survey map in the app. How to read a LiDAR map. Scheduled monuments are protected by law; use public rights of way.
Sources
- LiDAR: Natural Resources Wales and Welsh Government, 1 m DTM, Open Government Licence.
- Heights: Waystone, from the same LiDAR sampled about every 12 m inside the boundary; 'most of the ground' is the middle 80% of those heights; metres above Ordnance Datum Newlyn.
- Parish boundary: Office for National Statistics, Parishes and Non Civil Parished Areas (December 2024), Open Government Licence. Contains OS data © Crown copyright and database right 2025.
- Recorded places: the national heritage records (Historic England, Cadw, Coflein and others) as held by Waystone.
- Coflein, Royal Commission on the Ancient and Historical Monuments of Wales, Open Government Licence.
Last updated 2026-10-16.