This map is a single HTML file that runs entirely in your browser. There is no back end operated by its publisher, no account, no login, no analytics, no advertising and no profiling. Nothing you do on the map is recorded by the publisher.
None. The page sets no cookies of its own and writes nothing to
localStorage, sessionStorage or IndexedDB. Closing the page leaves no trace
of your session. Your browser may cache map images in its ordinary HTTP cache, which you control
through your browser settings.
To draw the map, your browser requests files directly from the organisations listed below. Each request reveals your IP address, your browser's user agent, and which part of the map you are looking at. The publisher of this file does not see any of it.
wmts1-4.geoportail.lu): LiDAR relief tiles and aerial photos for Luxembourg.geoservices.wallonie.be):
LiDAR relief images and aerial photos for Wallonia, and elevation lookups.api.open-meteo.com): elevation lookups for Luxembourg.nominatim.openstreetmap.org): address search.
Only contacted when what you type is neither a coordinate nor one of the towns stored in this
file, and then it receives the exact text you typed.cdnjs.cloudflare.com): the Leaflet mapping library.fonts.googleapis.com, fonts.gstatic.com):
the IBM Plex typefaces.When your pointer rests over the map, the exact coordinate under it is sent to one external service so the altitude can be looked up: Open-Meteo inside Luxembourg, SPW inside Wallonia. This is a precise geographic coordinate, though it is a point on the map rather than your own location. The My location button asks your browser for your position only when you press it, and nothing is sent unless you do. The position itself never leaves your device; the map simply shows it and loads the usual tiles around it. Switching off the readout is not currently possible; if that matters to you, work offline from a cached view or remove the elevation lookup from the file.
Place names and the territory outlines are embedded in the file itself. Displaying them sends no request to anyone.
Because the publisher holds no data about you, there is nothing to access, correct or erase. For data held by the services above, contact them directly and consult their own privacy notices.
Questions about this file: phoenix550@icloud.com
This tool compares LiDAR shaded relief with aerial imagery over Luxembourg and Wallonia. Using it means accepting the terms below and the licence conditions of each data source.
The map displays material owned by others. Their terms govern what you may do with it, and they differ from one layer to the next.
The figures shown are measured values from the sources, not estimates, but several have limits worth knowing before you rely on them.
This tool is for viewing and interpretation. Do not use it for navigation, for determining property or administrative boundaries, for engineering decisions, or for any purpose where an error could cause harm or loss.
That layer is drawn from tags entered by OpenStreetMap contributors. It is not a survey and carries no guarantee: a site marked as a ruin may have been demolished, rebuilt or reoccupied years ago, and many real ones are not tagged at all. The relief shows that a structure exists, never whether it is in use, safe, or open to visitors.
A marker on this map is not permission to go there. Nearly all of these sites sit on land someone owns, and entering without the owner's agreement is trespass in both Luxembourg and Belgium. Some are fenced, monitored, or closed by order. Derelict buildings, mine shafts and wartime structures also carry real physical risk, including unstable floors, asbestos, flooding and unexploded ordnance. Get permission first, and check whether the site is protected or restricted before you plan a visit.
The file is provided as is, without warranty of any kind. Availability depends on services operated by third parties and may stop at any time without notice. To the extent permitted by law, the publisher accepts no liability for any loss arising from its use.
Governed by the law of [jurisdiction], with disputes subject to the courts of [jurisdiction].
The page stores nothing on your device. It sets no cookies of its own and uses no
localStorage, sessionStorage or IndexedDB.
One of the services the map loads images from does set a cookie in your browser:
| Name | Set by | Purpose | Lifetime |
|---|---|---|---|
| BIGipServer~PRODUCTION~PO_GEOSERVICES_SSL | geoservices.wallonie.be (SPW) | Keeps a browser session on the same server behind a load balancer | Session, cleared when the browser closes |
It is flagged HttpOnly and Secure, carries no identifier that tracks
you across sites, and exists only to route requests. The other services used by the map
(geoportail.lu, Open-Meteo, Cloudflare and Google Fonts) set no cookies when the map
requests tiles, fonts or scripts.
Under the ePrivacy Directive, consent is required before storing information on a user's device unless that storage is strictly necessary to deliver a service the user asked for. A load balancing session cookie is one of the cases the Article 29 Working Party listed as exempt in its Opinion 04/2012 on cookie consent exemption. Since the map itself stores nothing and the only cookie present is that technical one, a consent banner is not required as the tool currently works.
That conclusion depends on the file staying as it is. Adding analytics, embedding a social or
video widget, or saving preferences to localStorage would introduce storage that is
not strictly necessary, and consent would then be required before it is set. This policy describes
the file's behaviour; it is not legal advice, and a lawyer should review it before you publish the
tool for others.
| Layer | Provider | Captured | Resolution |
|---|---|---|---|
| Luxembourg DTM and DSM | ACT, geoportail.lu | February 2019 | 50 cm raster |
| Wallonia DTM and DSM | SPW, geoportail.wallonie.be | 2021-2022 | 50 cm raster |
| Wallonia DTM, older | SPW, geoportail.wallonie.be | 2013-2014 | 50 cm raster |
| Aerial photos, Luxembourg | ACT, geoportail.lu | 2001, 2025 | varies by year |
| Aerial photos, Wallonia | SPW, geoportail.wallonie.be | 1971, 2001-2003, 2023, 2026 | varies by year |
| Altitude, Luxembourg | Open-Meteo, Copernicus DEM GLO-90 | 2021 release | 90 m |
| Altitude, Wallonia | SPW terrain model query | 2021-2022 | 50 cm |
| Place names | OpenStreetMap contributors | 2026-09-20 | 4,583 places |
| Territory outlines | OpenStreetMap contributors | 2026-09-20 | simplified to ~22 m |
| Building footprints, Luxembourg | ACT cadastre, geoportail.lu | current | from zoom 15 |
| Building footprints, Wallonia | SPW PICC, geoportail.wallonie.be | current | from zoom 15 |
| Ruins and abandoned sites | OpenStreetMap contributors | 2026-09-20 | 8,478 points |
| Bike trails | OpenStreetMap contributors | 2026-09-20 | 23,764 lines |
| Address search | Nominatim, OpenStreetMap | live | fallback only |
The Luxembourg survey was flown in February 2019 at 15 points per square metre, with a stated horizontal accuracy of plus or minus 3 cm and vertical accuracy of plus or minus 6 cm. The terrain model uses only returns classified as ground; the surface model uses all returns except power lines and noise. Both are published on a 50 cm grid in LUREF, EPSG:2169.
The Wallonia terrain model is published at 0.5 m resolution from LiDAR acquisitions carried out in 2021 and 2022, with an earlier 2013-2014 campaign kept available for comparison.
The file carries 4,583 populated places, 710 in Luxembourg and 3,873 in Wallonia, filtered to points falling inside the two territories. Only settlement types are included: city, town, village, suburb, borough, quarter and hamlet. No road or street data is present in the file, at any zoom.
Selecting "Above ground" as the relief layer does not fetch a fourth dataset. Your browser loads the terrain and surface hillshades for each tile and subtracts one from the other, so anything standing on the ground lights up and bare ground goes dark. Buildings read as solid blocks with straight edges; trees read as round, textured clumps.
Two limits are worth knowing. Neither provider publishes raw elevation over the web, so this differences two shaded renders rather than two elevation models, which makes it a good visual guide and not a measurement. And under closed canopy the canopy itself is above ground, so the whole scene saturates and the view stops being informative. For a roofless ruin under trees the plain terrain model is the better layer, because the walls survive in it while the canopy does not.
The file carries 8,478 tagged points inside the two territories: 1,348 ruins, 2,341 marked abandoned, 3,153 marked disused, 1,026 bunkers, 471 brownfield sites and 139 mine shafts. OpenStreetMap often holds several overlapping nodes for one site, so points of the same kind within 35 m of each other have been collapsed, which removed 1,570 duplicates. Disused and brownfield are switched off by default because those tags mostly cover closed shops and cleared land rather than standing structures. The data comes from OpenStreetMap and is only as current as its contributors have made it.
None. Every service used here is reachable without a key or token, so there is no credential in this file and nothing to keep secret. If you later add a service that requires a key, note that a key placed in a browser page is readable by anyone who opens it, and it will need a server side proxy or a domain restricted key instead.