Photo review
Field photographs
Loading thumbnails...
Model color relief
Colors distinguish relative surface relief in the model and are paired with hillshade. No validated elevation scale or tidal-datum tie is published here.
Site assets
Photo review
Loading thumbnails...
GPS ledger
Each value belongs to one GPS row; it is not a single elevation for the site. The CSV distinguishes local-datum height from receiver altitude.
| ID | Lat | Lon | Point height | V. accuracy |
|---|---|---|---|---|
| HS109 - saragasso - GCP3 | -21.9556673902625 | -157.879729936169 | 12.72 | 0.093005 |
| HS109 - saragasso - gcp 4 | -21.9558873723858 | -157.879645228697 | 11.82 | 0.08264 |
| HS109 - saragasso - gcp 1 | -21.9556555995767 | -157.879498683818 | 12.64 | 0.07656 |
| HS109 - saragasso - gcp 5 | -21.95548572144 | -157.879346324683 | 12.77 | 0.06708 |
| HS109 - saragasso - gcp 7 | -21.955623093165 | -157.879271379512 | 11.07 | 0.06409 |
| HS109-C | -21.955879190785 | -157.879628563618 | 11.68 | 0.06097 |
| HS109-B | -21.9559516502367 | -157.87959896354 | 6.33 | 0.06208 |
| HS109-A | -21.9559897210767 | -157.879592272362 | 4.34 | 0.06117 |
| HS109-D | -21.9557344394433 | -157.879618161438 | 12.03 | 0.05817 |
| HS109-E | -21.9557013484 | -157.879637272102 | 12.86 | 0.05722 |
| HS109-Z | -21.9557523488633 | -157.879730029995 | 12.86 | 0.05701 |
| HS109-F | -21.9558437132833 | -157.879735253723 | 11.62 | 0.05616 |
| HS109G Coral head at base of cliff, inland of road | -21.95495175403 | -157.88035388045 | 12.87 | 1.82203 |
Samples
| Sample | Type | Time CKT | Position | Photos |
|---|---|---|---|---|
| HS109A | Fossilized coral | 2026-06-01 16:42 | -21.955990, -157.879592 4.337 m |
|
| HS109B | Fossilized coral | 2026-06-01 16:37 | -21.955952, -157.879599 6.330 m |
|
| HS109C | Fossilized coral | 2026-06-01 16:31 | -21.955879, -157.879629 11.678 m |
|
| HS109D | Fossilized coral | 2026-06-01 16:50 | -21.955734, -157.879618 12.030 m |
|
| HS109E | Fossilized coral | 2026-06-01 16:52 | -21.955701, -157.879637 12.861 m |
|
| HS109F | Fossilized coral | 2026-06-01 17:02 | -21.955844, -157.879735 11.619 m |
|
| HS109G | Fossilized coral | 2026-06-01 17:33 | -21.954952, -157.880354 12.871 m |
|
Raster data
The map’s DEM layer is a hillshade visualization. These links provide the source elevation raster and orthophoto as GeoTIFFs for local analysis. The DEM uses the island-specific datum.
SHA-256 checksums are included in the public manifest for reproducibility.
HS109 has photogrammetry map layers, but profile transects have not been defined yet.
Animated geology plate
Mangaia, Cook Islands
Surveyed 2026-06-01
Explore Saragossa’s closely spaced reef ridges and seaward channels at one selected hero stop.
Based on the 1 June 2026 Mangaia field notes and calibrated survey photographs. A shows ridge-and-channel relief. Field notes describe branching framework on ridges and coral growth along channels, but exact fabrics, species, growth position and sample identities are not established at this presentation target. “Deeper-water feel” is an interpretation, not measured paleodepth. No geological age or sea-level elevation is assigned. The low and high flights share only one valid natural tie track; five shared pinned GCPs agree within 3.4–9.4 cm when triangulated separately. Larger unpinned GCP4 offsets of 5–7 pixels remain unedited. Matched photographs and six surface sections showed no broad duplicated ground in the reviewed main exposure; this is not a whole-site accuracy certification. Vegetation and moving water remain uncertain. Gray cut walls, backing and reveal are artificial presentation geometry. Original source geometry, UVs and nine diffuse plus nine normal 8K maps are preserved.
A · Ridge and channel relief: field photograph (opens in a new tab)Explore further to begin the guided tour.