Atlas · Burundi / Data Dictionary & Units
DATA

Data Dictionary & Units

One set of units for the whole platform. Whatever unit a source uses, Atlas converts it on import and keeps the original, so numbers from different sources can be compared directly.

Atlas canonical units

MeasureAtlas unit
Areaha
hectare (ha)
Lengthm
metre (m)
Distancekm
kilometre (km)
Carbon Stock DensitytC/ha
tonnes of carbon per hectare
Co2etCO2e
tonnes CO2-equivalent
Percent%
percent (0-100)
TimeISO-8601 UTC
timestamp (UTC)
CrsEPSG:4326
WGS 84 geographic coordinates (decimal degrees)

Conversions Atlas applies

FromToRule
square metres (m²)hectares÷ 10,000
square kilometres (km²)hectares× 100
acreshectares× 0.404686
kilometresmetres× 1,000
square degrees / degrees—not physical units: excluded, recomputed from geometry
fraction (0–1)percent× 100; values over 100% are rejected
tonnes carbon (tC)tonnes CO₂-equivalent× 3.667 (44/12)
biomass Mg/hatonnes carbon per ha× carbon fraction (method recorded with the value)
local / US dates (M/D/YY)ISO-8601parsed explicitly; ambiguous formats confirmed from the data
local timeUTCzone recorded; assumption flagged when the source omits it
any projected CRS (e.g. UTM 37S)EPSG:4326reprojected; native CRS recorded
blank placeholders (" ")NULLtrimmed and emptied

Measurements stored in Atlas

Observation types and variables, with their units
TypeVariableUnitObservationsDatasets
areaArea_sqKm_PAha7,4381
areaArea_sq_Km_Countryha7,4381
areatree_cover_loss___haha1521
percentIRRI_PCT%23,0951

Field-by-field treatment per dataset

Open a dataset's 'Fields & units' tab for the full table; summary below

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
tree_cover_loss___hahahakept (unit taken from field name)
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
SHAPE_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Areaunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Areaunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Area_sqKm_PAkm2haconverted
Area_sq_Km_Countrykm2haconverted
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Areaunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Areaunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
IRRI_PCT% (assumed 0-100)%kept; values outside 0-100 rejected
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Areaunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Lengunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS

FieldSource unitAtlas unitTreatment
Shape_Lengunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
Shape_Lengthunknown (often degrees)—EXCLUDED - unit not stated; geodesic area/length computed from geometry instead
geometryEPSG:4326 degreesha / mgeodesic area (ha), perimeter (m) and length (km) computed on the WGS 84 ellipsoid with PostGIS
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