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Label Theme
URI dcat_theme_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To provide a dedicated field that is restricted to terms based on ISO Topic Categories
Entry Guidelines Insert one or more of the Themes from the list (see below).
Commentary Although ISO Topic categories are well established and widely used, the spellings of these terms vary across domains and disciplines. The Aardvark Profile uses shortened terms for better readability, and adds three new values “Events”, “Imagery”, and “Land Cover” (the latter two split from imageryBaseMapsEarthCover).
Controlled Vocabulary yes - strict
Example value ["Boundaries", "Land Cover"]
Element Set DCAT
Group Categories

Controlled Vocabulary

Theme Related ISO Topic Category Definition (from NOAA)
Agriculture farming Rearing of animals and/or cultivation of plants. Examples: agriculture, irrigation, aquaculture, plantations, herding, pests and diseases affecting crops and livestock
Biology biota Flora and/or fauna in natural environment. Examples: wildlife, vegetation, biological sciences, ecology, wilderness, sealife, wetlands, habitat
Boundaries boundaries Legal land descriptions. Examples: political and administrative boundaries
Climate climatologyMeteorologyAtmosphere Processes and phenomena of the atmosphere. Examples: cloud cover, weather, climate, atmospheric conditions, climate change, precipitation
Economy economy Economic activities, conditions and employment. Examples: production, labour, revenue, commerce, industry, tourism and ecotourism, forestry, fisheries, commercial or subsistence hunting, exploration and exploitation of resources such as minerals, oil and gas
Elevation elevation Height above or below sea level. Examples: altitude, bathymetry, digital elevation models, LiDAR datasets, slope, derived products, topographic maps
Environment environment Environmental resources, protection and conservation. Examples: environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape
Events society; climatologyMeteorologyAtmosphere Examples: natural disasters, concerts, races, protests, arrests, accidents, Covid cases
Geology geoscientificInformation Information pertaining to earth sciences. Examples: geophysical features and processes, geology, minerals, sciences dealing with the composition, structure and origin of the earth’s rocks, risks of earthquakes, volcanic activity, landslides, gravity information, soils, permafrost, hydrogeology, erosion
Health health Health, health services, human ecology, and safety. Examples: disease and illness, factors affecting health, hygiene, substance abuse, mental and physical health, health services
Imagery imageryBaseMapsEarthCover Imagery of the earth’s surface. Examples: aerial photos, oblique and streetview imagery, orthoimagery, satellite photos and multispectral imagery
Inland Waters inlandWaters Inland water features, drainage systems and their characteristics. Examples: rivers and glaciers, salt lakes, water utilization plans, dams, currents, floods, water quality, hydrographic charts
Land Cover imageryBaseMapsEarthCover Classifications about natural features on the Earth’s surface. Examples: forests, wetlands, impervious surfaces, agriculture, open water
Location location Positional information and services. Examples: addresses, geodetic networks, control points, postal zones and services, place names
Military intelligenceMilitary Examples: Military bases, structures, activities Examples: barracks, training grounds, military transportation, information collection
Oceans oceans features and characteristics of salt water bodies (excluding inland waters) Examples: tides, tidal waves, coastal information, reefs
Property planningCadastre Information used for appropriate actions for future use of the land. Examples: land use maps, zoning maps, cadastral surveys, land ownership
Society society Characteristics of society and cultures. Examples: settlements, anthropology, archaeology, education, traditional beliefs, manners and customs, demographic data, recreational areas and activities, social impact assessments, crime and justice, census information
Structure structure Man-made construction. Examples: buildings, museums, churches, factories, housing, monuments, shops, towers
Transportation transportation Means and aids for conveying persons and/or goods. Examples: roads, airports/airstrips, shipping routes, tunnels, nautical charts, vehicle or vessel location, aeronautical charts, railways
Utilities utilitiesCommunication Energy, water and waste systems and communications infrastructure and services. Examples: hydroelectricity, geothermal, solar and nuclear sources of energy, water purification and distribution, sewage collection and disposal, electricity and gas distribution, data communication, telecommunication, radio, communication networks