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OpenGeoMetadata (OGM) Aardvark Schema

Object

Identifiers

Admin

Key

(R) = Required

(C) = Conditionally Required

(S) = Suggested

(v) = Controlled Values


Access Rights

Label Access Rights
URI dct_accessRights_s
Obligation Required
Multivalued false
Field type string
Purpose To clarify to the user if the resource is public (any user can access) or restricted (a user will need to log in to some kind of authentication protocol) and if the application should provide a web service preview and/or a download function
Entry Guidelines Only one of two values are allowed: Public or Restricted.
Commentary This field can be set to "Public", which allows users to view and download an item, or "Restricted", which requires a user to log in to an authentication service.
Controlled Vocabulary yes - strict
Example value "Public"
Element Set DCMI
Group Rights

Alternative Title

Label Alternative Title
URI dct_alternative_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To provide the user with the another title if needed
Entry Guidelines This could be for a secondary or original title or subtitle.
Commentary For discoverability, improving titles for data is encouraged. This field could be a place to keep the original title. It could also be useful for scanned maps. Some have long titles that include MARC subtitle fields, such as 245$b. Whether or not this field should appear in your GeoBlacklight item view pages can be customized in the application.
Controlled Vocabulary no
Example value ["NEZ H Districts"]
Element Set DCMI
Group Bibliographic - general

Bounding Box

Label Bounding Box
URI dcat_bbox
Obligation Suggested
Multivalued false
Field type string
Purpose To support overlap ratio boosting in spatial searches
Entry Guidelines This should be a bounding box in this format: ENVELOPE(w,e,n,s).
Commentary If the locn_geometry field uses the ENVELOPE syntax, then these fields will be identical.
Controlled Vocabulary no
Example value "ENVELOPE(-111.1, -104.0, 45.0, 40.9)"
Element Set DCAT
Group Spatial

Centroid

Label Centroid
URI dcat_centroid
Obligation Optional
Multivalued false
Field type string
Purpose To display the center point of a resource
Entry Guidelines Enter two decimal degree coordinates separated by a comma in this order: latitude,longitude.
Commentary This field is currently only supported by customizations to the GeoBlacklight application.
Controlled Vocabulary no
Example value "46.4218,-94.087"
Element Set DCAT
Group Spatial

Creator

Label Creator
URI dct_creator_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To credit the person/organization that collected or authored the resource
Entry Guidelines The suggested controlled vocabulary is the Library of Congress Name Authority File.
Commentary This field is best reserved for instances in which an individual person has collected, produced, or generated analyses of data (as opposed to an agency releasing a data product or resource). It can be a person or an organization.
Controlled Vocabulary no
Example value ["Geological Survey (U.S.)"]
Element Set DCMI
Group Bibliographic - entity

Date Issued

Label Date Issued
URI dct_issued_s
Obligation Optional
Multivalued false
Field type string
Purpose To provide the user with the date when an item was published, and for administrators to determine the age of the resource
Entry Guidelines A single year is the preferred format. For more precise dates, use the ISO format without the time value: YYYY-MM-DD or YYYY-MM.
Commentary Although the field is optional, it is often useful when a clear Temporal Coverage value is not present. For example, one may want to preserve a dataset with an uncertain lineage, but there is an indicator on a data portal on the date of last update. In most cases, the 4-digit year is sufficient.
Controlled Vocabulary no
Example value "1999"
Element Set DCMI
Group Temporal

Date Range

Label Date Range
URI gbl_dateRange_drsim
Obligation Optional
Multivalued true
Field type string
Purpose To power other time widgets that use a date range
Entry Guidelines Enter a start date and end date in the Solr date range field convention. In JSON, the value should be formatted as a string that includes the brackets, rather than as an array or list containing a string. Incorrect: ["YYYY TO YYYY"] - Correct: "[YYYY TO YYYY]"
Commentary This field is not yet supported by GeoBlacklight, but the application can be customized to use it.
Controlled Vocabulary no
Example value "[1980 TO 1995]"
Element Set GBL
Group Temporal

Description

Label Description
URI dct_description_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To provide the user with a summary of the resource
Entry Guidelines At minimum, this is a reiteration of the title in sentence format. Other relevant information, such as data creation methods, data sources, and special licenses, may also be included. Description is a plain text field by default.
Commentary This field is the second-most prominent value (after Title) that users see when search or browsing for items. Although not required, it is strongly recommended. If the description is minimal or lacking, it can be improved by concatenating available metadata fields, such as title, date, format, and place. This is a plain text field, so html code is not supported here unless the application is customized.
Controlled Vocabulary no
Example value "This polygon shapefile represents boundaries of election districts in New York City. It was harvested from the NYC Open Data Portal."
Element Set DCMI
Group Bibliographic - general

Display Note

Label Display Note
URI gbl_displayNote_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To highlight additional information about a resource, such as warnings or tips for using the data.
Entry Guidelines Prefix the string with "Warning:", "Info:", or "Tip:" to specify the type of note. Future versions of GeoBlacklight will use such prefixes to control the style of the displayed note. Styles and additional prefixes (for example, in other languages) can be added in the GeoBlacklight config.
Commentary This field is currently only supported by customizations to the GeoBlacklight application. On the item page, text in this field will be prominently displayed in a shaded box just after the title.
Controlled Vocabulary no
Example value ["Warning: This text (starting with 'This text') will be displayed in a red box","Info: This text (starting with 'This text') will be displayed in a blue box","Tip: This text (starting with 'This text') will be displayed in a green box","This is text without a tag and it will be assigned the default 'note' style"]
Element Set DCMI
Group Bibliographic - general

File Size

Label File Size
URI gbl_fileSize_s
Obligation Optional
Multivalued false
Field type string
Purpose To inform the user of the size of the file download
Entry Guidelines Enter the size in megabytes.
Commentary This field is intended to give users a sense of how large the data or image they are interested in downloading, and serves to alert users about huge files.
Controlled Vocabulary no
Example value "25.96 MB"
Element Set GBL
Group Distribution

Format

Label Format
URI dct_format_s
Obligation Conditionally Required
Multivalued false
Field type string
Purpose To display to the user the name of the file type as a text string in the download button
Entry Guidelines Required if the download URL is configured as a single key:value pair.
Commentary See recommended values below. This field is required for basic download functionality.
Controlled Vocabulary yes - not strict
Example value "Shapefile"
Element Set DCMI
Group Distribution
  • ArcGRID
  • CD-ROM
  • DEM
  • DVD-ROM
  • Feature Class
  • Geodatabase
  • GeoJPEG
  • GeoJSON
  • GeoPackage
  • GeoPDF
  • GeoTIFF
  • JPEG
  • JPEG2000
  • KML
  • KMZ
  • LAS
  • LAZ
  • Mixed
  • Mixed
  • MrSID
  • PDF
  • PNG
  • Pulsewaves
  • Raster Dataset
  • Shapefile
  • SQLite Database
  • Tabular Data
  • TIFF

Geometry

Label Geometry
URI locn_geometry
Obligation Suggested
Multivalued false
Field type string
Purpose To display the extent of the resource and to power the map search
Entry Guidelines This may be a bounding box or more complex geometry. For a bounding box, it should use the ENVELOPE(w,e,n,s) syntax. For a more complex geometry, it should use the WKT ("well-known text") POLYGON or MULTIPOLYGON syntax. Note that WKT polygon vertices should be defined in counter-clockwise order.
Commentary Since this field is not repeatable, multiple polygons should be represented using the WKT "MULTIPOLYGON" syntax. Geometries that span the 180th Meridian, aka the Antimeridian, should be broken up into multiple bounding boxes or polygons for each side of the earth's hemisphere. This is because Solr, the underlying indexer for GeoBlacklight, can not interpret these coordinates correctly and will display the geometry improperly (horizontally flipped).
Controlled Vocabulary no
Example value Simple bounding box: "ENVELOPE(-111.1, -104.0, 45.0, 40.9)"Bermuda Triangle: "POLYGON((-80 25, -65 18, -64 33, -80 25))"Split bounding box for Alaska: "MULTIPOLYGON (((-179.3 51.1, -129.9 51.1, -129.9 71.5, -179.3 71.5, -179.3 51.1)),((172.3 51.2, 179.9 51.2, 179.9 53.1, 172.3 53.1, 172.3 51.2)))"
Element Set LOCN
Group Spatial

Georeferenced

Label Georeferenced
URI gbl_georeferenced_b
Obligation Optional
Multivalued false
Field type boolean or string
Purpose To indicate whether or not a scanned map or other imagery has a georeferenced version
Entry Guidelines Only one of two values are allowed: true or false.
Commentary This field can be a shortcut for users to find georeferenced maps. Administrators can also employ the Source field to link a paper map with its scan (e.g. a TIFF) and its georeferenced version (e.g. a GeoTIFF).
Controlled Vocabulary yes - strict
Example value false or "false"
Element Set GBL
Group Administrative

ID

Label ID
URI id
Obligation Required
Multivalued false
Field type string
Purpose To provide a unique alpha-numeric ID for the item that will act as the primary key in Solr and to create a unique landing page for the item
Entry Guidelines This string must be a globally unique value. The value should be alpha-numeric characters separated by dashes.
Commentary This field makes up the URL for the resource in GeoBlacklight. It is visible to the user and is used to create permalinks. The value should be alpha-numeric characters separated by dashes. If having a readable slug is desired, it is common to use the form institution-keyword1-keyword2. It should also be globally unique across all institutions in your GeoBlacklight index.
Controlled Vocabulary no
Example value "princeton-rv042w38t"
Element Set GBL
Group Administrative

Identifier

Label Identifier
URI dct_identifier_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To provide a general purpose field for identifiers
Entry Guidelines This may include a DOI, catalog number, and/or other system number.
Commentary This is a general purpose field that can contain one or more persistent identifers or permalinks. At least one value would be ideally a persistent identifier or permalink (such as a PURL or Handle. Additional values can be for other identifiers used by the resource, such as the call number, OCLC number, or other system identifier. This field is not displayed in the interface.
Controlled Vocabulary no
Example value ["5864 .L7 E635 1998 .G7"]
Element Set DCMI
Group Administrative

Index Year

Label Index Year
URI gbl_indexYear_im
Obligation Suggested
Multivalued true
Field type array of integers
Purpose To power time slider widgets that rely on integers for dates
Entry Guidelines Enter one or more 4-digit integers.
Commentary nan
Controlled Vocabulary no
Example value [1980,1981,1982]
Element Set GBL
Group Temporal

Is Part Of

Label Is Part Of
URI dct_isPartOf_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To link items that are a subset of another item (e.g. a page in a book)
Entry Guidelines Make a parent record to group records together. Enter the ID of the parent record(s).
Commentary nan
Controlled Vocabulary no
Example value ["77f-0001"]
Element Set DCMI
Group Relations

Is Replaced By

Label Is Replaced By
URI dct_isReplacedBy_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To point the user to new item(s)
Entry Guidelines Enter the ID of the related item(s) that should be used instead.
Commentary Replaces and Is Replaced By can be used for a revised version of a research dataset where the original is needed for reference. For example, if the original dataset has already been cited somewhere, it can be retained in a repository with a clear indication that it has been superseded by a new version.
Controlled Vocabulary no
Example value ["cugir-007933"]
Element Set DCMI
Group Relations

Is Version Of

Label Version
URI dct_isVersionOf_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To indicate that an item is part of a series of resources that are updated or altered and to provide a link to a different variant or adaption
Entry Guidelines Enter the ID of the most recent related record OR create a parent record to group versions together.
Commentary nan
Controlled Vocabulary no
Example value ["xyz-1234"]
Element Set DCMI
Group Relations

Keyword

Label Keyword
URI dcat_keyword_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To improve search results with hidden free text tags and to give administrators a field for internal tags
Entry Guidelines Enter tags that will be useful for enhancing searches and interpretation. Keywords will be in the metadata, but will be hidden to the user by default.
Commentary These may be used for administrative purposes or to facilitate text searching without cluttering a facet or interface. They may be helpful for grouping items by an accession code or for alternate spellings of common terms.
Controlled Vocabulary no
Example value ["covid19", "vaccination rate"]
Element Set DCAT
Group Categories

Language

Label Language
URI dct_language_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To provide the user with the language of the map
Entry Guidelines Enter a 3-letter code using the ISO 639-2 standard.
Commentary This field is intended to indicate the language of the dataset, map, and/or supporting documentation.
Controlled Vocabulary yes - not strict. Chose from the ISO 639-3 language codes documented on the Library of Congress website. https://www.loc.gov/standards/iso639-2/php/English_list.php
Example value ["eng"]
Element Set DCMI
Group Bibliographic - general

License

Label License
URI dct_license_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To provide URI links to specific, known licenses
Entry Guidelines Enter only a URI. Recommended sources are Creative Commons or Open Data Commons.
Commentary This field is only for URIs of known licenses. Do not enter a rightsstatement.org statement here, because those belong in the Rights field.
Controlled Vocabulary no
Example value ["https://creativecommons.org/licenses/by/4.0/"]
Element Set DCMI
Group Rights

Member Of

Label Member Of
URI pcdm_memberOf_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To link items that are part of a collection
Entry Guidelines Make a collection record to group records together. Enter the ID of the collection-level record.
Commentary nan
Controlled Vocabulary no
Example value ["xyz-12394"]
Element Set PCDM
Group Relations

Metadata Version

Label Metadata Version
URI gbl_mdVersion_s
Obligation Required
Multivalued false
Field type string
Purpose To clarify which GeoBlacklight metadata schema is being used
Entry Guidelines Enter the string: Aardvark.
Commentary There have been two metadata schema versions for GeoBlacklight: 1.0 and Aardvark.
Controlled Vocabulary yes - strict
Example value "Aardvark"
Element Set GBL
Group Administrative

Modified

Label Modified
URI gbl_mdModified_dt
Obligation Required
Multivalued false
Field type string
Purpose To inform administrators of when the metadata was last touched
Entry Guidelines Use the "W3C Date and Time Format" (YYYY-MM-DDThh🇲🇲ssZ)
Commentary This value should indicate when the metadata (not the resource itself) was last modified.
Controlled Vocabulary no
Example value "2015-01-01T12:00:00Z"
Element Set GBL
Group Administrative

Provider

Label Provider
URI schema_provider_s
Obligation Suggested
Multivalued false
Field type string
Purpose To clarify which organization is holds the resource or acts as the custodian for the metadata record and to help users understand which resources they can access
Entry Guidelines This field can be any string value. However, if the value corresponds to the name of an SVG icon in GeoBlacklight, the icon will display next to the title. See the GeoBlacklight documentation for more details.
Commentary This field was named Provenance in the GBL 1.0 Metadata schema.
Controlled Vocabulary yes - not strict
Example value "University of Minnesota"
Element Set schema.org
Group Administrative - entity

Publisher

Label Publisher
URI dct_publisher_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To credit the entity that first made a new version of something available
Entry Guidelines The suggested controlled vocabulary is the Library of Congress Name Authority File.
Commentary The distinction between dc_publisher_s and dc_creator_sm for data is often vague. Publishers should be the administrative body or organization that made the original resource available, regardless of who compiled or produced the data.
Controlled Vocabulary no
Example value ["ML InfoMap (Firm)"]
Element Set DCMI
Group Bibliographic - entity

References

References URI Keys

Label References
URI dct_references_s
Obligation Suggested
Multivalued false
Field type string (serialized JSON)
Purpose To provide external URLs for accessing or describing the resource
Entry Guidelines This field defines external services and references using the CatInterOp approach. The field value is a serialized JSON array of key/value pairs, with keys representing namespace URI's and values the URL. See the Configure References Links page for detailed information about configuring this field.
Commentary All of the external links for the resource are added to This field as a serialized JSON array of key/value pairs. The download key/value pair is unique, because the value can be an array.
Controlled Vocabulary yes - see Reference URIs
Example value "{\"http://schema.org/url\":\"http://purl.stanford.edu/bm662dm5913\",\"http://schema.org/downloadUrl\":\"http://stacks.stanford.edu/file/druid:bm662dm5913/data.zip\"}"
Element Set DCMI
Group Distribution

Relation

Label Relation
URI dct_relation_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To link items with a general, unspecified relationship to each other
Entry Guidelines Enter only the ID of the related item(s).
Commentary nan
Controlled Vocabulary no
Example value ["aoeu-987643"]
Element Set DCMI
Group Relations

Replaces

Label Replaces
URI dct_replaces_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To point the user to deprecated item(s)
Entry Guidelines Enter the ID of the deprecated related item(s).
Commentary Replaces and Is Replaced By can be used for a revised version of a research dataset where the original is needed for reference. For example, if the original dataset has already been cited somewhere, it can be retained in a repository with a clear indication that it has been superseded by a new version.
Controlled Vocabulary no
Example value ["qrst-71717"]
Element Set DCMI
Group Relations

Resource Class

Label Resource Class
URI gbl_resourceClass_sm
Obligation Required
Multivalued true
Field type array of strings
Purpose To provide a top level set of categories for classifying the item
Entry Guidelines Choose one or more terms from the list (see below).
Commentary This field is intended to help users sort between significantly different types of resources.
Controlled Vocabulary yes - strict
Example value ["Datasets"]
Element Set GBL
Group Categories

Resource Class Controlled Values

  • Collections
  • Datasets
  • Imagery
  • Maps
  • Web services
  • Websites
  • Other

Resource Type

Label Resource Type
URI gbl_resourceType_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To provide a secondary level of categories for classifying the spatial type or structure of a dataset
Entry Guidelines Choose one or more terms from the list (see below). Other terms are allowed.
Commentary This field combines an established list of terms for scanned maps (Cartographic Genres) and a custom list for geospatial data types. Additional terms are welcome - please submit them to the community for review and inclusion into the official vocabulary.
Controlled Vocabulary yes - not strict
Example value ["Point data"]
Element Set GBL
Group Categories

Resource Type Controlled Values

Term Source
Aerial photographs LOC
Aerial views LOC
Aeronautical charts LOC
Annotations GBL
Armillary spheres LOC
Astronautical charts LOC
Astronomical models LOC
Atlases LOC
Basemaps GBL
Bathymetric maps LOC
Block diagrams LOC
Bottle-charts LOC
Cadastral maps LOC
Cartographic materials LOC
Cartographic materials for people with visual disabilities LOC
Celestial charts LOC
Celestial globes LOC
Census data LOC
Children's atlases LOC
Children's maps LOC
Comparative maps LOC
Composite atlases LOC
Digital elevation models LOC
Digital maps LOC
Early maps LOC
Ephemerides LOC
Ethnographic maps LOC
Fire insurance maps LOC
Flow maps LOC
Gazetteers LOC
Geological cross-sections LOC
Geological maps LOC
Globes LOC
Gores (Maps) LOC
Gravity anomaly maps LOC
Index maps LOC
LiDAR GBL
Line data GBL
Linguistic atlases LOC
Loran charts LOC
Manuscript maps LOC
Mappae mundi LOC
Mental maps LOC
Mesh data GBL
Meteorological charts LOC
Military maps LOC
Mine maps LOC
Miniature maps LOC
Multi-spectral data GBL
Nautical charts LOC
Oblique photographs GBL
Outline maps LOC
Photogrammetric maps LOC
Photomaps LOC
Physical maps LOC
Pictorial maps LOC
Plotting charts LOC
Point cloud data GBL
Point data GBL
Polygon data GBL
Portolan charts LOC
Quadrangle maps LOC
Raster data GBL
Relief models LOC
Remote-sensing maps LOC
Road maps LOC
Satellite imagery GBL
Statistical maps LOC
Stick charts LOC
Streetview photographs GBL
Strip maps LOC
Table data GBL
Thematic maps LOC
Topographic maps LOC
Tourist maps LOC
Upside-down maps LOC
Wall maps LOC
World atlases LOC
World maps LOC
Worm's-eye views LOC
Zoning maps LOC

Rights

Label Rights
URI dct_rights_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To provide a free text field for rights information, such as usage, access, or copyright
Entry Guidelines Enter free text of generic, catch-all access and usage rights. It can include clickable links; all access and usage rights.
Commentary This field is intended to be flexible to accommodate different types of rights and disclaimers. Users are encouraged to adopt one of the rightsstatements.org statements.
Controlled Vocabulary no
Example value "All data is copyrighted by China Data Center and/or its suppliers. Derived works that include the source data must be merged with other value-added data in such a way that the derived work cannot be converted back to the original source data format. This data is licensed by UC Berkeley for research, educational, and other non-commercial use by authorized users, which include persons affiliated with UC Berkeley and walk-in users who must access the data in person at the library. https://rightsstatements.org/page/InC/1.0/?language=en"
Element Set DCMI
Group Bibliographic - general

Rights Holder

Label Rights Holder
URI dct_rightsHolder_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To clarify which person or organization owns or controls the rights for this version of the item
Entry Guidelines Enter the name of the person or organization. If applicable, the suggested controlled vocabulary is the Library of Congress Name Authority File.
Commentary This field can be used for instances in which an an organization owns a digital copy of an analog resource or otherwise controls access. This is different from Provider, which refers more to the resource or metadata steward.
Controlled Vocabulary no
Example value "Johns Hopkins University Libraries"
Element Set DCMI
Group Rights

Source

Label Source
URI dct_source_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To link items that have been derived from another item (e.g. a digitized shapefile from a historical map)
Entry Guidelines Enter the ID of the item(s) from which the resource was derived.
Commentary nan
Controlled Vocabulary no
Example value ["abcd-988763"]
Element Set DCMI
Group Relations

Spatial coverage

Label Spatial Coverage
URI dct_spatial_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To provide the user with a list of searchable and selectable place names
Entry Guidelines Place name text strings should be specified out to the nation level. It is typical for the place name to represent the largest extent the data layer represents. Our recommended thesaurus is GeoNames.
Commentary It is recommended to have at least one place name for each layer that corresponds to the logical extent of the area of that layer.
Controlled Vocabulary no
Example value ["Philadelphia, Pennsylvania, United States"]
Element Set DCMI
Group Spatial

Subject

Label Subject
URI dct_subject_sm
Obligation Optional
Multivalued true
Field type array of strings
Purpose To provide an all-purpose field for subjects
Entry Guidelines Any value is allowed, but controlled vocabularies are encouraged.
Commentary nan
Controlled Vocabulary no
Example value ["Elections", "Voting"]
Element Set DCMI
Group Categories

Suppressed

Label Suppressed
URI gbl_suppressed_b
Obligation Optional
Multivalued false
Field type boolean or string
Purpose To hide items from users in the search results. If set to True, the record will not appear in search results. It is still accessible from the Data Relations widget and via direct URL.
Entry Guidelines Only one of two values are allowed: true or false.
Commentary This field is useful for multipart items with identical metadata, such as pages in an atlas or series.
Controlled Vocabulary yes - strict
Example value true or "true"
Element Set GBL
Group Administrative

Temporal Coverage

Label Temporal Coverage
URI dct_temporal_sm
Obligation Suggested
Multivalued true
Field type array of strings
Purpose To provide the user with a free text description of the time period or ranges of what is depicted in the resource
Entry Guidelines This is a text string and can indicate uncertainty.
Commentary Since this field is multi-valued, multiple strings can be used to indicate the time period the resource depicts, when the data was collected, and/or when the resources was created.
Controlled Vocabulary no
Example value ["1980-1995", "Late 20th century"]
Element Set DCMI
Group Temporal

Theme

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

Theme Controlled Values

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

Title

Label Title
URI dct_title_s
Obligation Required
Multivalued false
Field type string
Purpose To provide the user with the name of the resource
Entry Guidelines Titles should include place names and dates when available.
Commentary The title is the most prominent metadata field that users see when browsing or scanning search results. Since many datasets are created with ambiguous or non-unique titles, it may be worth the effort to improve or enhance them. The ideal sequence of a title is something akin to Topic of Layer: Place, Year. Putting the year at the end of a title produces better search results, since titles are left-anchored.
Controlled Vocabulary no
Example value "Address Points: Ann Arbor, Michigan, 2010"
Element Set DCMI
Group Bibliographic - general

WxS Identifier

Label WxS Identifier
URI gbl_wxsIdentifier_s
Obligation Conditional
Multivalued false
Field type string
Purpose To identify the layer or store for a WFS, WMS, or WCS web service so the application can construct the full web service link
Entry Guidelines Only the layer name is added here. The base service endpoint URLs (e.g. "https://maps-public.geo.nyu.edu/geoserver/sdr/wms") are added to the References field.
Commentary This value is only used when you have WxS services listed in your references field (dct_references_s). The WxS Identifer is used to point to specific layers within an OGC geospatial web service. This field is not used for ArcGIS Rest Services.
Controlled Vocabulary no
Example value "druid:vr593vj7147"
Element Set GBL
Group Distribution