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COOK ISLANDS 2026
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Regional context

Atiu

Atiu

HS103 Oravaru

Surveyed 2026-05-27

Map layers

Site assets

Daily logs

May 27, 2026

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

Photos

Photo review

Field photographs

277 photos

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GPS ledger

Coordinates and point heights

CSV

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.

IDLatLonPoint heightV. accuracy
HS103 Cooks Landing -19.98978922 -158.141551217333 3.59 0.162
GCP -19.99068784537 -158.141777699203 4.15 0.08796
GCP -19.9905167300567 -158.14160283753 2.25 0.0858
GCP -19.9903287002183 -158.141695359108 2.36 0.07616
HS103A -19.9901554382083 -158.141571379592 1.58 0.09319
Near HS103B -19.989918416635 -158.141560380012 2.38 0.19079
Remeasure HS103B -19.9899183454833 -158.141560451058 2.34 0.17655
GCP3 float -19.9896501910283 -158.14161496145 1.78 0.19027
GCP3 float -19.9896503822367 -158.141615138455 1.78 0.18312
ATIU-20260527-HISEAS-050 -19.989650453485 -158.141615296803 1.81 0.17321
HA103C -19.9896433385083 -158.141563978362 2.86 0.16867
ATIU-20260527-HISEAS-052 -19.9896436142767 -158.141563674535 2.86 0.16547
ATIU-20260527-HISEAS-053 -19.9896232763667 -158.141458423113 2.43 0.50134
GCP5 -19.989623162703 -158.141455945169 2.01 0.979642

Samples

Sample list

SampleTypeTime CKTPositionPhotos
HS103A Fossilized coral 2026-05-27 10:54 -19.990155, -158.141571
1.583 m
HS103B Fossilized coral 2026-05-27 11:05 -19.989918, -158.141560
2.378 m
HS103C Fossilized coral ,
HS103D Fossilized coral ,

Raster data

Download site rasters

Manifest

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.

Raw DEM GeoTIFF HS103_dem.tif · 13.1 MiB EPSG:4326 · Float32 · 1 band
Download
Orthophoto GeoTIFF HS103_orthophoto_rgba.tif · 69.8 MiB EPSG:4326 · Byte · 4 bands
Download

SHA-256 checksums are included in the public manifest for reproducibility.

Topographic profiles pending

HS103 has photogrammetry map layers, but profile transects have not been defined yet.

Animated geology plate

HS103: Oravaru / Cook’s Landing

Atiu, Cook Islands

Surveyed 2026-05-27

HS103: Oravaru / Cook’s Landing

Explore the lower coral framework and an irregular reef surface with adjacent sand at Oravaru / Cook’s Landing.

Field notes

Based on the 27 May 2026 Atiu field observations, calibrated drone photographs and matched field photographs. H1 shows lower coral framework; H5 shows irregular reef relief and adjacent sand. The photographs provide fine detail beyond the model texture. Ages, event origin and sea-level implications are not established here. Focus positions are approximate presentation coordinates. The rectangular block, upper canopy cut and grey closure are artificial display geometry; the original source model is preserved.

H1 · Lower coral framework: field photograph (opens in a new tab) H5 · Irregular reef–sand contact: field photograph (opens in a new tab)
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Cook Islands 2026

Southern Cook Islands
May to June 2026

Daily Logs Sites Data Downloads Samples Tidal Datums Report Progress Legacy Archive

The Cook Islands 2026 field campaign is part of HISEAS, funded by the U.S. National Science Foundation (NSF), EAR 24-20482 (2024–2029).