Portsmouth Water - Google Earth 3-D tile quality by site

Photorealistic-tile coverage across the 24 Portsmouth Water twin sites · generated 28 Jul 2026

These are the 24 Portsmouth Water sites recently added to the Critec Digital Twin. Each is a one-time local bake of Google Photorealistic 3-D Tiles. This report grades how good Google's imagery actually is at each location, from super-high-definition photogrammetry down to flat, draped aerial imagery with no real 3-D structure.

How the tiles were captured: each site's baked tileset was rendered in isolation (away from the twin UI) using the same 3d-tiles-renderer + reorientation the twin uses, on this host's real GPU (AMD Radeon 680M), framed to an oblique aerial view and left to fully stream in before the shot.
Key point about LOD: every baked site reaches Google's finest tile level - a geometric error of ~2.0 m everywhere (measured across every tileset). So the LOD floor is uniform; what actually varies is how much real 3-D detail Google captured there. Towns and large works get rich photogrammetry; open farmland gets only a flat image draped on the ground. That difference is what the grades below measure.

Quality spans the full range across this estate: a town-centre pumping station reaches full High-LOD photogrammetry, most villages and works sit in the middle, and several rural boosters and boreholes are on open farmland that Google only covers as flat, near-featureless imagery.

Distribution

■ High LOD: 1■ Good: 5■ Medium: 11■ Low: 4■ Flat / minimal: 3
High LODDense, crisp photogrammetry - buildings, tanks, vehicles and roofs are sharply 3-D. Google's best coverage.
GoodSolid photogrammetry; structures clearly 3-D, textures a touch softer than the best sites.
MediumMixed - structures recognisable but softer, with large areas of flat open ground (pasture / fields).
LowMostly soft / near-flat; buildings indistinct, dominated by fields and woodland with little clear 3-D.
Flat / minimalNear-featureless aerial imagery draped on flat ground - open farmland with no real 3-D structure. The 'none / flat' end.

All sites, ranked

Best tile quality first. "Tiles" = number / size of baked .glb mesh tiles; "finest" = smallest geometric error in the tileset; "across" = rendered site extent.

#SiteClientGradeTiles MBTilesFinestAcross
1Havant Pumping StationPortsmouth WaterHigh LOD544612.0 m529 m
2River Itchen (Low Lift PS)Portsmouth WaterGood755272.0 m674 m
3River Itchen WTWPortsmouth WaterGood654872.0 m657 m
4Maindell WTW/ Street End Booster ChlorinationPortsmouth WaterGood483762.0 m539 m
5Bedhampton 2 Pumping StationPortsmouth WaterGood323032.0 m489 m
6Bedhampton 1 Pumping StationPortsmouth WaterGood202072.0 m395 m
7Farlington WTWPortsmouth WaterMedium635252.0 m884 m
8West Meon BoostersPortsmouth WaterMedium444632.0 m679 m
9Lovedean W.T.W/Clanfield-Catherington BoostersPortsmouth WaterMedium373852.0 m567 m
10West Street WTWPortsmouth WaterMedium364502.0 m571 m
11Fishbourne WTWPortsmouth WaterMedium304002.0 m580 m
12Soberton WTW/Firdown BoostersPortsmouth WaterMedium232302.0 m395 m
13Newtown Remote BoreholePortsmouth WaterMedium222482.0 m416 m
14Northbrook W.T.W/Street End Booster ChlorinationPortsmouth WaterMedium182052.0 m396 m
15Worlds End WTWPortsmouth WaterMedium162182.0 m396 m
16Aldingbourne WTWPortsmouth WaterMedium133442.0 m583 m
17Lower Upham Remote BoreholePortsmouth WaterMedium122212.0 m392 m
18Walderton WTW/Walderton BoostersPortsmouth WaterLow192862.0 m497 m
19Eastergate W.T.W/Norehill BoostersPortsmouth WaterLow42842.0 m585 m
20Westergate WTWPortsmouth WaterLow42802.0 m585 m
21Slindon WTW/Whiteways BoostersPortsmouth WaterLow31932.0 m422 m
22Funtington W.T.W/Lavant BoostersPortsmouth WaterFlat / minimal192262.0 m416 m
23Lavant W.T.W/Highdown BoostersPortsmouth WaterFlat / minimal131752.0 m418 m
24Brickkiln WTW Appledown BoostersPortsmouth WaterFlat / minimal101542.0 m416 m

Site gallery

High LOD1 site

Dense, crisp photogrammetry - buildings, tanks, vehicles and roofs are sharply 3-D. Google's best coverage.

Havant Pumping Station
Havant Pumping Station
Portsmouth Water · High LOD
Dense Havant townscape - terraced houses, streets and industrial units fully 3-D.
54 MB tiles461 tilesfinest 2.0 m~529 m across
Good5 sites

Solid photogrammetry; structures clearly 3-D, textures a touch softer than the best sites.

River Itchen (Low Lift PS)
River Itchen (Low Lift PS)
Portsmouth Water · Good
Suburban streets, a retail shed and a solar farm clearly modelled beside the M27.
75 MB tiles527 tilesfinest 2.0 m~674 m across
River Itchen WTW
River Itchen WTW
Portsmouth Water · Good
Works buildings, solar roofs and tanks well resolved; the surrounding water-meadow is softer.
65 MB tiles487 tilesfinest 2.0 m~657 m across
Maindell WTW/ Street End Booster Chlorination
Maindell WTW/ Street End Booster Chlorination
Portsmouth Water · Good
Industrial-estate warehouses, a scrapyard and the A-road all sharply modelled.
48 MB tiles376 tilesfinest 2.0 m~539 m across
Bedhampton 2 Pumping Station
Bedhampton 2 Pumping Station
Portsmouth Water · Good
Warblington village, a castle ruin and solar array clear; grazing land softer.
32 MB tiles303 tilesfinest 2.0 m~489 m across
Bedhampton 1 Pumping Station
Bedhampton 1 Pumping Station
Portsmouth Water · Good
Village housing, railway and a solar array crisply captured; open pasture around.
20 MB tiles207 tilesfinest 2.0 m~395 m across
Medium11 sites

Mixed - structures recognisable but softer, with large areas of flat open ground (pasture / fields).

Farlington WTW
Farlington WTW
Portsmouth Water · Medium
Suburban terraces well resolved; large playing-field / common areas render flat.
63 MB tiles525 tilesfinest 2.0 m~884 m across
West Meon Boosters
West Meon Boosters
Portsmouth Water · Medium
Country estate with formal gardens and pools well detailed; fields flat.
44 MB tiles463 tilesfinest 2.0 m~679 m across
Lovedean W.T.W/Clanfield-Catherington Boosters
Lovedean W.T.W/Clanfield-Catherington Boosters
Portsmouth Water · Medium
Village and farm buildings 3-D; a large dark cropped field renders flat.
37 MB tiles385 tilesfinest 2.0 m~567 m across
West Street WTW
West Street WTW
Portsmouth Water · Medium
Village housing and a horse gallop resolved; large pasture / fields render flat.
36 MB tiles450 tilesfinest 2.0 m~571 m across
Fishbourne WTW
Fishbourne WTW
Portsmouth Water · Medium
Village housing and units resolved; a large tram-lined crop field renders flat.
30 MB tiles400 tilesfinest 2.0 m~580 m across
Soberton WTW/Firdown Boosters
Soberton WTW/Firdown Boosters
Portsmouth Water · Medium
Estate house, tennis court and farm buildings 3-D; surrounding fields flat.
23 MB tiles230 tilesfinest 2.0 m~395 m across
Newtown Remote Borehole
Newtown Remote Borehole
Portsmouth Water · Medium
Village edge, church and farm buildings modelled amid flat pasture.
22 MB tiles248 tilesfinest 2.0 m~416 m across
Northbrook W.T.W/Street End Booster Chlorination
Northbrook W.T.W/Street End Booster Chlorination
Portsmouth Water · Medium
Village houses modelled; a big solar farm reads as flat panel rows.
18 MB tiles205 tilesfinest 2.0 m~396 m across
Worlds End WTW
Worlds End WTW
Portsmouth Water · Medium
Rural village - houses, farms and allotments readable, foliage a little blobby.
16 MB tiles218 tilesfinest 2.0 m~396 m across
Aldingbourne WTW
Aldingbourne WTW
Portsmouth Water · Medium
Glasshouses, farm buildings and a village edge modelled; cropped fields flat.
13 MB tiles344 tilesfinest 2.0 m~583 m across
Lower Upham Remote Borehole
Lower Upham Remote Borehole
Portsmouth Water · Medium
Farmstead and hedgerow trees have real volume; open pasture is softer.
12 MB tiles221 tilesfinest 2.0 m~392 m across
Low4 sites

Mostly soft / near-flat; buildings indistinct, dominated by fields and woodland with little clear 3-D.

Walderton WTW/Walderton Boosters
Walderton WTW/Walderton Boosters
Portsmouth Water · Low
A small hamlet is visible but soft; dominated by flat ploughed fields.
19 MB tiles286 tilesfinest 2.0 m~497 m across
Eastergate W.T.W/Norehill Boosters
Eastergate W.T.W/Norehill Boosters
Portsmouth Water · Low
Suburban housing present but noticeably soft / low-res; gallops and fields flat.
4 MB tiles284 tilesfinest 2.0 m~585 m across
Westergate WTW
Westergate WTW
Portsmouth Water · Low
Mostly woodland and flat fields; buildings indistinct and the imagery soft.
4 MB tiles280 tilesfinest 2.0 m~585 m across
Slindon WTW/Whiteways Boosters
Slindon WTW/Whiteways Boosters
Portsmouth Water · Low
A single small building beside a large flat crop field with treed margins.
3 MB tiles193 tilesfinest 2.0 m~422 m across
Flat / minimal3 sites

Near-featureless aerial imagery draped on flat ground - open farmland with no real 3-D structure. The 'none / flat' end.

Funtington W.T.W/Lavant Boosters
Funtington W.T.W/Lavant Boosters
Portsmouth Water · Flat / minimal
Predominantly flat tram-lined crop fields; only a small building and a house cluster carry any 3-D.
19 MB tiles226 tilesfinest 2.0 m~416 m across
Lavant W.T.W/Highdown Boosters
Lavant W.T.W/Highdown Boosters
Portsmouth Water · Flat / minimal
Flat brown and green fields with tramlines; a tiny farm building is the only structure - effectively 2-D.
13 MB tiles175 tilesfinest 2.0 m~418 m across
Brickkiln WTW Appledown Boosters
Brickkiln WTW Appledown Boosters
Portsmouth Water · Flat / minimal
Almost entirely flat ploughed / crop fields with one small farm building at a junction.
10 MB tiles154 tilesfinest 2.0 m~416 m across
Generated from the live baked tilesets under CRITEC-AIO/public/demo/<site>-3dtiles/. Grades are a visual judgement of Google's photogrammetry richness; the underlying LOD floor (~2 m geometric error) is identical at every site. Screenshots rendered on a real GPU with the twin's own tile pipeline, no live Google calls.