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Metrics reference

Definitions, sources, and aggregation rules for MariMap survey, satellite, and restoration metrics used in MRV and disclosures.

Use the filter chips to see which metrics support TNFD, CSRD, EU Taxonomy, or VCS VM0033.

All
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
VCS VM0033
Survey coverage and effort
11

Survey effort, staffing, and sampling footprint derived from field survey records.

Surveys

Number of surveys completed within the selected scope and time range.

Metric key

survey.count

Unit

surveys

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Participants (total)

Sum of recorded participants across surveys in the selected scope and time range.

Metric key

survey.participants.total

Unit

people

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Sum

Participants (mean)

Average participants per survey in the selected scope and time range.

Metric key

survey.participants.mean

Unit

people

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Mean

Survey duration (total)

Total logged survey duration in hours across the selected scope and time range.

Metric key

survey.duration_hours.total

Unit

hours

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Sum

Survey duration (mean)

Average survey duration in hours per survey.

Metric key

survey.duration_hours.mean

Unit

hours

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Mean

Divers (total)

Sum of divers recorded across surveys.

Metric key

survey.divers.total

Unit

people

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Sum

Media items

Total photos, videos, and media files attached to surveys.

Metric key

survey.media.count

Unit

items

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Count

Artifacts

Total uploaded artifacts and files linked to surveys.

Metric key

survey.artifacts.count

Unit

items

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Count

Observation units

Number of observation units (transects, plots, quadrats) recorded.

Metric key

survey.observation_units.count

Unit

units

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Transect length (total)

Total transect length sampled across surveys.

Metric key

survey.transect_length_m.total

Unit

m

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Sum

Transect area (total)

Total surveyed transect area across surveys.

Metric key

survey.transect_area_m2.total

Unit

m2

Source

Field surveys

Method / protocol

Survey metadata

Aggregation

Sum

Live coral cover

Percent of benthic cover classified as live hard coral.

Metric key

benthic.live_coral_pct

Unit

%

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Percent

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Dead coral cover

Percent of benthic cover classified as dead coral.

Metric key

benthic.dead_coral_pct

Unit

%

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Percent

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Rubble cover

Percent of benthic cover classified as rubble.

Metric key

benthic.rubble_pct

Unit

%

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Percent

Sand cover

Percent of benthic cover classified as sand.

Metric key

benthic.sand_pct

Unit

%

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Percent

Transects

Number of benthic transects recorded.

Metric key

benthic.transects.count

Unit

count

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Count

PIT hits

Count of point-intercept hits recorded.

Metric key

benthic.pit_hits.count

Unit

count

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Count

LIT spans

Count of line-intercept spans recorded.

Metric key

benthic.lit_spans.count

Unit

count

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Count

Cover by code

Percent cover by benthic code or category for each survey.

Metric key

benthic.cover_pct_by_code

Unit

%

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Percent

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Health by code

Percent cover by health category or benthic condition code.

Metric key

benthic.health_pct_by_code

Unit

%

Source

Field surveys

Method / protocol

Benthic transect (PIT/LIT/CIT)

Aggregation

Percent

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Fish count

Total fish observed across belt transects.

Metric key

fish.total_count

Unit

count

Source

Field surveys

Method / protocol

Fish belt transect

Aggregation

Sum

Fish biomass

Estimated total fish biomass derived from size classes.

Metric key

fish.total_biomass_kg

Unit

kg

Source

Field surveys

Method / protocol

Fish belt transect

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Species (distinct)

Distinct fish species recorded.

Metric key

fish.species.distinct.count

Unit

count

Source

Field surveys

Method / protocol

Fish belt transect

Aggregation

Distinct count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Genera (distinct)

Distinct fish genera recorded.

Metric key

fish.genera.distinct.count

Unit

count

Source

Field surveys

Method / protocol

Fish belt transect

Aggregation

Distinct count

Observations

Total fish observations recorded.

Metric key

fish.observations.count

Unit

count

Source

Field surveys

Method / protocol

Fish belt transect

Aggregation

Count

Species (total)

Total fauna species observations summed across surveys.

Metric key

fauna.total_species

Unit

count

Source

Field surveys

Method / protocol

Fauna observation

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Genera (total)

Total fauna genera observations summed across surveys.

Metric key

fauna.total_genera

Unit

count

Source

Field surveys

Method / protocol

Fauna observation

Aggregation

Sum

Individuals (total)

Total individual fauna counted.

Metric key

fauna.individuals.total

Unit

count

Source

Field surveys

Method / protocol

Fauna observation

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Observations

Total fauna observations recorded.

Metric key

fauna.observations.count

Unit

count

Source

Field surveys

Method / protocol

Fauna observation

Aggregation

Count

Species (distinct)

Distinct fauna species recorded.

Metric key

fauna.species.distinct.count

Unit

count

Source

Field surveys

Method / protocol

Fauna observation

Aggregation

Distinct count

Trees (total)

Total trees measured in tree growth surveys.

Metric key

tree_growth.total_trees

Unit

trees

Source

Field surveys

Method / protocol

Tree growth (DBH/height)

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
VCS VM0033
DBH (mean)

Mean diameter at breast height for measured trees.

Metric key

tree_growth.mean_dbh_cm

Unit

cm

Source

Field surveys

Method / protocol

Tree growth (DBH/height)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
VCS VM0033
Height (mean)

Mean tree height for measured trees.

Metric key

tree_growth.mean_height_m

Unit

m

Source

Field surveys

Method / protocol

Tree growth (DBH/height)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
VCS VM0033
Biomass (total)

Total above-ground biomass estimated from tree measurements.

Metric key

tree_growth.total_biomass_kg

Unit

kg

Source

Field surveys

Method / protocol

Tree growth (DBH/height)

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
VCS VM0033
Carbon (total)

Total carbon stock estimated from tree measurements.

Metric key

tree_growth.total_carbon_kg

Unit

kg

Source

Field surveys

Method / protocol

Tree growth (DBH/height)

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
VCS VM0033
Species (distinct)

Distinct mangrove species recorded.

Metric key

tree_growth.species.distinct.count

Unit

count

Source

Field surveys

Method / protocol

Tree growth (DBH/height)

Aggregation

Distinct count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Images

Number of benthic images captured.

Metric key

benthic_images.images.count

Unit

images

Source

Field surveys

Method / protocol

Benthic image survey

Aggregation

Count

Annotated images

Number of benthic images with annotations.

Metric key

benthic_images.images.annotated.count

Unit

images

Source

Field surveys

Method / protocol

Benthic image survey

Aggregation

Count

Mask annotations

Total segmentation mask annotations.

Metric key

benthic_images.annotations.masks.count

Unit

annotations

Source

Field surveys

Method / protocol

Benthic image survey

Aggregation

Count

Point annotations

Total point annotations.

Metric key

benthic_images.annotations.points.count

Unit

annotations

Source

Field surveys

Method / protocol

Benthic image survey

Aggregation

Count

Sea surface temperature (NOAA CRW)

Daily NOAA Coral Reef Watch CoralTemp sea surface temperature.

Metric key

noaa_crw.sst.value

Unit

deg C

Source

NOAA Coral Reef Watch

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
SST anomaly (NOAA CRW)

Daily SST anomaly relative to the long-term mean.

Metric key

noaa_crw.ssta.value

Unit

deg C

Source

NOAA Coral Reef Watch

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Degree heating weeks (NOAA CRW)

Cumulative heat stress over the previous 12 weeks.

Metric key

noaa_crw.dhw.value

Unit

deg C-weeks

Source

NOAA Coral Reef Watch

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
HotSpot (NOAA CRW)

Current SST above the bleaching threshold (HotSpot).

Metric key

noaa_crw.hs.value

Unit

deg C

Source

NOAA Coral Reef Watch

Aggregation

Mean

Disclosure relevance
TNFD LEAP
Bleaching alert area (NOAA CRW)

Bleaching alert level category derived by NOAA CRW.

Metric key

noaa_crw.baa5.value

Source

NOAA Coral Reef Watch

Aggregation

Score

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Maximum monthly mean (MMM)

Site-specific maximum monthly mean SST computed from the baseline period.

Metric key

derived.mmm

Unit

deg C

Source

Derived / modeled

Aggregation

Mean

Disclosure relevance
TNFD LEAP
Bleaching threshold

Bleaching threshold computed as MMM + 1 deg C.

Metric key

derived.bleaching_threshold

Unit

deg C

Source

Derived / modeled

Aggregation

Mean

Disclosure relevance
TNFD LEAP
Sea surface temperature (CMEMS)

Daily CMEMS SST sampled at the site grid cell.

Metric key

cmems.sst.value

Unit

deg C

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Sea surface salinity (CMEMS)

Daily CMEMS surface salinity sampled at the site grid cell.

Metric key

cmems.sea_salinity.value

Unit

PSU

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
Chlorophyll-a (CMEMS)

Daily CMEMS chlorophyll-a concentration.

Metric key

cmems.chlorophyll.value

Unit

mg/m3

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Chlorophyll-a (multi-year, CMEMS)

Multi-year CMEMS chlorophyll-a estimate.

Metric key

cmems.chlorophyll_my.value

Unit

mg/m3

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Surface pH (CMEMS)

Daily CMEMS surface ocean pH estimate.

Metric key

cmems.ph.value

Unit

pH

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Surface current speed (CMEMS)

Surface current speed magnitude from CMEMS.

Metric key

cmems.surface_current_speed.value

Unit

m/s

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Surface current direction (CMEMS)

Surface current direction (0-360 degrees) from CMEMS.

Metric key

cmems.surface_current_direction.value

Unit

deg

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Tide height / sea level proxy (CMEMS)

Sea level anomaly or tide height proxy from CMEMS.

Metric key

cmems.tide_height.value

Unit

m

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Sea level anomaly (CMEMS)

Sea level anomaly relative to mean sea level (CMEMS).

Metric key

cmems.sea_level_anomaly.value

Unit

m

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Wave height (CMEMS)

Significant wave height from the CMEMS wave model.

Metric key

cmems.wave_height.value

Unit

m

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Wave period (CMEMS)

Dominant wave period from the CMEMS wave model.

Metric key

cmems.wave_period.value

Unit

s

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Wave direction (CMEMS)

Dominant wave direction (0-360 degrees).

Metric key

cmems.wave_direction.value

Unit

deg

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Primary swell height (CMEMS)

Primary swell height from the CMEMS wave model.

Metric key

cmems.primary_swell_height.value

Unit

m

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Primary swell period (CMEMS)

Primary swell period from the CMEMS wave model.

Metric key

cmems.primary_swell_period.value

Unit

s

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

Primary swell direction (CMEMS)

Primary swell direction (0-360 degrees).

Metric key

cmems.primary_swell_direction.value

Unit

deg

Source

Copernicus Marine Service (CMEMS)

Aggregation

Mean

NDVI (CLMS)

Normalized Difference Vegetation Index (10-daily).

Metric key

clms.ndvi.value

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Mean

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
NDVI quality flag (CLMS)

Quality flag for NDVI; lower values indicate better quality.

Metric key

clms.ndvi_qflag.value

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Mean

NDVI observation count (CLMS)

Number of observations contributing to NDVI composite.

Metric key

clms.ndvi_nobs.value

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Mean

NDVI uncertainty (CLMS)

Uncertainty estimate for NDVI composite.

Metric key

clms.ndvi_uncertainty.value

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Mean

Land surface temperature (CLMS)

Daytime land surface temperature (10-daily).

Metric key

clms.lst_day.value

Unit

deg C

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Mean

Tree cover fraction (CLMS)

Percent of land cover classified as tree cover.

Metric key

clms.lc_tree_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Shrub cover fraction (CLMS)

Percent of land cover classified as shrub cover.

Metric key

clms.lc_shrub_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Grass cover fraction (CLMS)

Percent of land cover classified as grass cover.

Metric key

clms.lc_grass_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Crops cover fraction (CLMS)

Percent of land cover classified as crops.

Metric key

clms.lc_crops_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Bare cover fraction (CLMS)

Percent of land cover classified as bare ground.

Metric key

clms.lc_bare_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Built-up cover fraction (CLMS)

Percent of land cover classified as built-up areas.

Metric key

clms.lc_builtup_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Permanent water fraction (CLMS)

Percent of land cover classified as permanent water.

Metric key

clms.lc_water_perm_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Seasonal water fraction (CLMS)

Percent of land cover classified as seasonal water.

Metric key

clms.lc_water_seasonal_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Snow/ice fraction (CLMS)

Percent of land cover classified as snow or ice.

Metric key

clms.lc_snow_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Tree canopy density (CLMS)

Tree canopy density from the CLMS pantropical product.

Metric key

clms.tree_canopy_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Burned area fraction (CLMS)

Burned area fraction for the period.

Metric key

clms.burnt_area_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Burned area confidence (CLMS)

Confidence of burned area detection.

Metric key

clms.burnt_area_confidence_pct.value

Unit

%

Source

Copernicus Land Monitoring Service (CLMS)

Aggregation

Percent

Population (GHSL)

Population count per grid cell.

Metric key

ghsl.population.value

Unit

people

Source

Global Human Settlement Layer (GHSL)

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Built-up surface (GHSL)

Built-up surface area per grid cell.

Metric key

ghsl.built_area.value

Unit

m2

Source

Global Human Settlement Layer (GHSL)

Aggregation

Sum

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Built-up volume (GHSL)

Built-up volume proxy per grid cell.

Metric key

ghsl.built_volume.value

Unit

m3

Source

Global Human Settlement Layer (GHSL)

Aggregation

Sum

Fragments total

Total coral fragments tracked at the facility.

Metric key

restoration.fragments.total

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Fragments alive

Fragments with status Alive (summary rollup).

Metric key

restoration.fragments.alive

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
Outplants total

Total outplant batches recorded.

Metric key

restoration.outplants.total

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Outplant survival %

Percent of outplanted fragments surviving.

Metric key

restoration.outplants.survival_pct

Unit

%

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Percent

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
Measurements

Count of fragment measurement events.

Metric key

restoration.measurement.count

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Fragment size (mean)

Mean fragment size value based on the selected size metric.

Metric key

restoration.measurement.size_value

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Mean

Bleaching (%)

Mean bleaching percent recorded in measurements.

Metric key

restoration.measurement.bleaching_pct

Unit

%

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Percent

Disclosure relevance
TNFD LEAP
Partial mortality (%)

Mean partial mortality percent recorded in measurements.

Metric key

restoration.measurement.partial_mortality_pct

Unit

%

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Percent

Disclosure relevance
TNFD LEAP
Disease prevalence

Percent of measurements with disease present.

Metric key

restoration.measurement.disease_present

Unit

%

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Percent

Disclosure relevance
TNFD LEAP
Predation prevalence

Percent of measurements with predation present.

Metric key

restoration.measurement.predation_present

Unit

%

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Percent

Disclosure relevance
TNFD LEAP
Fragment status: alive

Count of fragments currently marked alive.

Metric key

restoration.fragment.status.alive

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Fragment status: outplanted

Count of fragments marked outplanted.

Metric key

restoration.fragment.status.outplanted

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Fragment status: dead

Count of fragments marked dead.

Metric key

restoration.fragment.status.dead

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Fragment status: lost

Count of fragments marked lost.

Metric key

restoration.fragment.status.lost

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Fragment status: merged

Count of fragments marked merged.

Metric key

restoration.fragment.status.merged

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Fragment status: archived

Count of fragments archived.

Metric key

restoration.fragment.status.archived

Unit

count

Source

Restoration facility logs

Method / protocol

Restoration facility monitoring

Aggregation

Count

Human Impact Index (HPI)

Composite index combining ocean stress and human pressure indicators.

Metric key

aggregated.hpi

Source

Aggregated indicator

Aggregation

Index (unitless)

Disclosure relevance
TNFD LEAP
CSRD ESRS E4
EU Taxonomy
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