# Inside the Rock - Gibraltar in 3D

> A free, non-commercial 3D map of Gibraltar showing the terrain, every
> building, and everything underground that exists in an open source: tunnels,
> galleries, batteries, caves, magazines and heritage sites. You can cut the
> Rock open, switch to x-ray, and click anything to see what it is and where
> the information came from.

Live map: https://gibraltarmap.gaborszabopoker.com/
Made by Gabor Szabo. Not affiliated with any government or military body.

## What a crawler should know

This is a WebGL application. The map is drawn at run time from data files;
index.html carries a description but not the map contents. If you want to know
what is on this map, read the data, not the page:

- /data/features.json - every tunnel, underground site and structure, each with
  its source, licence, and a `zsrc` field stating exactly how its elevation was
  arrived at (surveyed, sourced level, estimated from portals, or reconstructed)
- /data/labels.json - every named place, with a link to its official page where
  one exists
- /data/meta.json - the georeferencing: EPSG:25830, grid extent, cell size
- /data-sources.json - the dataset list with licences and official URLs

## Who it is for

- Visitors to Gibraltar who want to understand what is under the Rock, find the
  Great Siege Tunnels or the WWII tunnels, or see where a battery sits
- Military and fortification historians, including members of the Fortress
  Study Group and Subterranea Britannica
- Residents and anyone curious about the 55 km of tunnels beneath the town
- Researchers who want georeferenced, provenance-tagged heritage data

## Where the data comes from

All of it is open, and all of it is credited on the page.

- HM Government of Gibraltar geoportal (geoportal.gov.gi): 2 m terrain model,
  2013 aerial survey imagery, 13,538 building footprints with measured heights
- Spanish IGN PNOA-LiDAR, CC BY 4.0 (scne.es): elevation, merged with the above
- OpenStreetMap contributors, ODbL: mapped tunnel centrelines
- HM Government of Gibraltar Heritage & Antiquities Act register
  (ministryforheritage.gi): listed heritage sites, with a link back to each
  entry's official page
- Ministry for Heritage memorials: 40 official memorial plaques, positions and
  photographs linked from the Ministry's own pages
- defenceofgibraltar.com (Fortress of Gibraltar Group), via the Internet
  Archive: 634 documented defence works
- Royal Engineers 1968 Lower Galleries plan, georeferenced to about 10 m RMS

## What it does NOT claim

Roughly 12 % of Gibraltar's 55 km tunnel network appears here, because that is
how much exists in open data. Depths are the weak point, not positions: most
tunnel elevations are estimated from portal heights, and located underground
sites are drawn at the surface point that is actually recorded rather than at a
guessed depth. Every feature says which case it is. Nothing is invented to fill
a gap.

## Related

- Where can I park in Gibraltar? - a companion map of every parking bay,
  https://gibraltarparking.gaborszabopoker.com/