Coral Cover: Halmahera 2026

Shaded value = in the CV mean (shade deepens with cover) Gray italic = shown for comparison but left out of the CV mean: the gold standard (the reference value) and the manually annotated in CoralNet CoralNet benchmark annotations (reference values, not models), Coralscapes (not trusted), and any value that reuses the reference's own data n = frames behind the value — = not run or not applicable (see each region's notes) Site names and method names link out (new tab)

Coral Cover: Halmahera 2026

22 sites · 3,593 photos

No gold standard.

Site	Date	Headline (site page)	Claude	DINOv3	Coralscapes v1	Coralscapes v2	CoralSCOP	Mean ± SD of CV	Range
Failonga	2026-08-09	33%Claude	33^a,en=201	31^a,bn=201	55^a,cn=201	58^a,cn=201	32^a,dn=201	32 ± 0.6	31–33
Maitara North	2026-08-09	33%Claude	33^a,en=171	34^a,bn=171	49^a,cn=171	51^a,cn=171	26^a,dn=171	31 ± 4.1	26–34
AM Point 2	2026-08-09	40%Claude	40^a,en=223	33^a,bn=223	57^a,cn=223	61^a,cn=223	28^a,dn=223	34 ± 6.2	28–40
Pretty Shallow	2026-08-10	32%Claude	32^a,en=105	32^a,bn=105	54^a,cn=105	56^a,cn=105	30^a,dn=105	31 ± 1.1	30–32
Kusu Drift	2026-08-10	26%Claude	26^a,en=143	28^a,bn=143	51^a,cn=143	56^a,cn=143	34^a,dn=143	29 ± 4.1	26–34
Pulau Sebatang	2026-08-10	41%Claude	41^a,en=265	34^a,bn=265	65^a,cn=265	67^a,cn=265	36^a,dn=265	37 ± 3.9	34–41
Tower Corner	2026-08-11	34%Claude	34^a,en=242	35^a,bn=242	55^a,cn=242	58^a,cn=242	34^a,dn=242	35 ± 0.7	34–35
Sali Bay-Batu Mangga	2026-08-11	25%Claude	25^a,en=361	32^a,bn=361	52^a,cn=361	53^a,cn=361	31^a,dn=361	29 ± 3.9	25–32
Tanjung Naraka	2026-08-12	30%Claude	30^a,en=136	30^a,bn=136	54^a,cn=136	55^a,cn=136	35^a,dn=136	32 ± 3.2	30–35
Tanjung Dehebra	2026-08-12	25%Claude	25^a,en=103	28^a,bn=103	52^a,cn=103	54^a,cn=103	34^a,dn=103	29 ± 4.8	25–34
Kusu Ridge	2026-08-12	45%Claude	45^a,en=249	43^a,bn=249	64^a,cn=249	66^a,cn=249	28^a,dn=249	39 ± 9.5	28–45
Jerot	2026-08-13	23%Claude	23^a,en=172	28^a,bn=172	55^a,cn=172	57^a,cn=172	42^a,dn=172	31 ± 9.7	23–42
Proco	2026-08-13	32%Claude	32^a,en=227	32^a,bn=227	51^a,cn=227	54^a,cn=227	34^a,dn=227	33 ± 1.1	32–34
Kusu Drift (round 2)	2026-08-13	43%Claude	43^a,en=105	32^a,bn=105	61^a,cn=105	65^a,cn=105	38^a,dn=105	38 ± 5.6	32–43
Merida Cavern	2026-08-14	27%Claude	27^a,en=125	24^a,bn=125	38^a,cn=125	41^a,cn=125	31^a,dn=125	28 ± 3.6	24–31
Batu Balong shallows-near anchorage	2026-08-14	57%Claude	57^a,en=213	33^a,bn=213	70^a,cn=213	74^a,cn=213	38^a,dn=213	43 ± 12.2	33–57
Batu Balong	2026-08-14	39%Claude	39^a,en=126	28^a,bn=126	60^a,cn=126	61^a,cn=126	34^a,dn=126	34 ± 5.7	28–39
Batu Mandi	2026-08-14	12%Claude	12^a,en=22	17^a,bn=22	34^a,cn=22	36^a,cn=22	28^a,dn=22	19 ± 8.4	12–28
Siko Tanjung	2026-08-15	41%Claude	41^a,en=143	31^a,bn=143	58^a,cn=143	59^a,cn=143	32^a,dn=143	35 ± 5.8	31–41
Siko Pinnacle	2026-08-15	12%Claude	12^a,en=48	19^a,bn=48	33^a,cn=48	37^a,cn=48	27^a,dn=48	19 ± 7.5	12–27
Reene's Rock (Pulau Gewang)	2026-08-15	13%Claude	13^a,en=39	18^a,bn=39	32^a,cn=39	37^a,cn=39	23^a,dn=39	18 ± 4.9	13–23
Lelay Utara (north)	2026-08-16	48%Claude	48^a,en=174	31^a,bn=174	57^a,cn=174	58^a,cn=174	30^a,dn=174	36 ± 9.9	30–48
All sites (unweighted mean)		—	32	30	53	55	32	31 ± 1.5	30–32

Notes for Halmahera 2026 (9)

[a] Value from the map's computer-vision method tables (denominator and photo set as on the site's page).
[b] DINOv3 (in-house, frozen Alor/Indonesia model) = mean hard-coral probability over 20 synthesized points per photo, NO water/fish class, so not a benthic denominator (from the map's site cover table).
[c] Coralscapes (v1 EPFL-ECEO/coralscapes-vit-b-dpt; v2 coralscapesv2-dinov3-vitb-lora-dpt) is not considered reliable for these photos: shown, never averaged. Area fraction, not a point count.
[d] CoralSCOP = per-frame sum of colony-mask area fractions (zero-filled; overlapping masks double-count), averaged over frames with an ok row. Area index, not a point count: denominator differs from any point-count reference. It is also unstable frame to frame (the same subject has scored 94.1% in one photo and 23.3% in another), and the mask sum overstates cover most on the healthiest reefs.
[e] Claude = blind 7-call point count on the UNEDITED photos, 20 points per photo, (HC+BL)/(20 − WATER − FISH − OBST), unknown points kept in the denominator; mean across photos.
Mean/Range: Mean ± SD and Range are over the CV cells that enter the mean (CoralNet where independent, DINOv3, CoralSCOP unedited/edited, Claude). Gold standard, frames manually annotated in CoralNet, Coralscapes and same-measurement cells are shown in gray italic but never averaged.
Headline (site page): the coral-cover figure the site's page, report card and map pop-up print, with its method; it is never averaged into the CV mean.
Methods: Claude (Anthropic); DINOv3 (Meta; paper; used here as the frozen backbone of the in-house classifier); Coralscapes v1 and v2 (EPFL-ECEO; dataset paper, code); CoralSCOP (Zheng et al., CVPR 2024); CoralNet.
Sites: names drop the region prefix (hover for the full name) and link to the site's CRD page, or to the regional summary page where the site has none. Date = survey date from the map pins (first–last visit); sites are listed earliest first, undated sites last.

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