Atlas · Madagascar / Data Quality
DATA

Data Quality

A transparent scorecard for every dataset: valid shapes, provenance coverage, internal consistency, verification and licence clarity. Known issues are listed openly so scientists can judge fitness for use.

Average score
96 / 100
Across all datasets
Features with provenance
319,264 / 319,264
Every feature traced to its source
Geometries repaired
92
Invalid shapes fixed on import
Datasets with a stated licence
16 / 44
Others held for internal use

Scorecard

Score = valid geometry 30% · provenance 25% · no flagged values 15% · unique IDs 15% · verification 10% · licence 5%

DatasetScoreFeaturesProvenanceNo geometryRepairedDuplicate IDsFlaggedRejected valuesVerifiedLicence
Global Mangrove Watch: mangrove extent 202...
100/100
13,81913,81900000 stated
Global Mangrove Watch: mangrove extent 199...
100/100
19,01119,01100000 stated
Global Mangrove Watch: mangrove extent 200...
100/100
15,17815,17800000 stated
Global Mangrove Watch: mangrove extent 201...
100/100
13,08113,08100000 stated
Global Mangrove Watch: mangrove extent 201...
100/100
13,62013,62000000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
31,14431,14400000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
26,50826,50800000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
21,58721,58700000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
17,78217,78200000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
17,60017,60000000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
16,78416,78400000 stated
Global Mangrove Watch v4.1: mangrove exten...
100/100
15,31915,31900000 stated
Mahafaly
95/100
1100000 not stated
Madagascar
95/100
1100000 not stated
Africa_Water_Towers
95/100
7700000 not stated
EAC_MZQ_ForestProgramme_Countries
95/100
8800000 not stated
flr_9
95/100
9900000 not stated
polygons
95/100
111100000 not stated
Biodiversity Hotspots
95/100
121200000 not stated
FLRi Countries
95/100
131300000 not stated
FLRi Countries
95/100
131300000 not stated
Operational Land/Seascape
95/100
7070010000 not stated
Operational Land/Seascape
95/100
7070010000 not stated
Operational Landscape
95/100
7979013000 not stated
Africa_WWF_Priority_202104_Operational_Lan...
95/100
9696016000 not stated
Fibre Cable Landing Stations
95/100
12612600000 not stated
Join_Features_to_Countries_RFP
95/100
15215200000 not stated
Rivers
95/100
22822800000 not stated
Administration (Level 2)
95/100
49549501000 not stated
Administration (Level 2)
95/100
49549501000 not stated
Power Plants (Power output MW)
95/100
64264200000 not stated
AfricaPriority_River
95/100
85785700000 not stated
Small airport
95/100
1,9791,97900000 not stated
Dams
95/100
2,5862,58600000 not stated
Districts
95/100
6,0996,099013000 not stated
World Database on Protected Areas
95/100
7,4387,43801000 not stated
Electricity Transmission Network
95/100
9,7599,75900000 not stated
Divisions
95/100
17,64917,64909000 not stated
Irrigated Areas
95/100
23,09523,09501000 not stated
Agro-Ecological Zones
95/100
25,79125,791017000 not stated
Carbon projects: Madagascar
90/100
8800000 —stated
Seagrass (UNEP-WCMC): Madagascar
90/100
252500000 —stated
Salt marsh (UNEP-WCMC): Madagascar
90/100
4400000 —stated
Community and nature projects (UNDP): Mada...
90/100
131300000 —stated

Known issues & assumptions

Stated plainly so nobody is surprised later
Field-plot canopy cover above 100%
One or more plots report a cover value over 100% (up to 6,070). That cannot be a percentage, so Atlas rejects the value, keeps the original and flags the plot.
Field-survey photos are not in the archive yet
The 139 plot photographs are not part of the archive yet. Their original links are kept, so the photos can be added when the publisher shares the image files.
No licence stated by the publisher
Atlas holds an archival copy for scientific and internal use and asks users to cite WWF Kenya, KMFRI and KFS. We are seeking written permission for wider redistribution.
Degree-based length and area fields excluded
Several source fields (st_area, st_length, Shape_Leng) are in degrees or square degrees, not metres or hectares. Atlas excludes them and recomputes from geometry.
Turtle timestamps assumed UTC
The source gives times without a time zone. UTC is assumed (standard for satellite telemetry) and the assumption is recorded with the data.
Unpopulated historic-area fields
The mangrove block layers carry 1990–2018 area fields that are all zero. They are treated as empty placeholders, not measurements.
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