Atlas · Madagascar / Dataset
DATASET

Seagrass (UNEP-WCMC): Madagascar

Seagrass meadows recorded in Madagascar, from the UNEP-WCMC global seagrass layer (compiled from many national and regional surveys; survey dates differ). Polygons show mapped meadows; points show places where seagrass is recorded but the area is not mapped.

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Features
25
seagrass_record, seagrass_meadow
Observations
0
Linked measurements
Quality score
90 / 100
Completeness · provenance · checks
Version
v1
Imported 2026-10-13

About this dataset

Source
UNEP-WCMC global seagrass and saltmarsh layers
UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT
Source layer
WCMC013_014_Seagrasses_v7_1 (EPSG:4326)
Module / ecosystem
SEAGRASS
Licence
—
Coordinate system
Stored as EPSG:4326 (WGS 84). Source native: n/a
Records archived
25 (matches the source's own count)

How to cite

UNEP-WCMC, Short FT (2021). Global distribution of seagrasses (version 7.1). Seventh update to the data layer used in Green and Short (2003). Cambridge (UK): UN Environment Programme World Conservation Monitoring Centre. Data DOI: 10.34892/x6r3-d211. (2026). Seagrass (UNEP-WCMC): Madagascar. Archived copy held by Atlas Blue Carbon Intelligence (snapshot n/a; SHA-256 13f9ee11a5a498f7…). Accessed via https://www.atlas.twende.green/datasets/seagrass-unep-wcmc-mg.

Feature classes

ClassFeatures
seagrass_record17
seagrass_meadow8

Measurements recorded

Geometry-only dataset
No separate measurements; attributes are shown in the data table.

Unit harmonisation applied to this dataset

Every number in Atlas is stored in one canonical unit; the original value and unit are always kept

No numeric measurements to convert
Place names / geometry only.

Attributes stored per feature

How many features carry each attribute (first 20,000)

AttributeFeatures
accuracy25
popup25
ecosystem25
broad8
area_ha_geodesic8

Checked against the geometry

Source value ÷ the same quantity computed from the stored shape

No unit checks apply

Archive & integrity

Snapshot
n/a
Format
GeoJSON
Archive checksum
13f9ee11a5a498f7c107e1c291a064b845f69f609a6060a634b2702ea423cfc6
Atlas serves this dataset from its own archived copy. Nothing is requested from the publisher when you view or download it.

Verification against the raw archive

Record counts match the source
Imported record count equals the source's own count; per-record cross-check recorded in the import run.

Import history

RunStatusStartedRecordsRepaired geometries
#1328completed2026-10-13 19:23:21+00250
11h 58mleft
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