Abstract
The concepts behind metadata have been around since the beginning of human communication, describing and recording what is known about objects/phenomena. This and the ability to communicate in detail – to interoperate – is what allowed humans to become the dominate species on Earth. Metadata is a primary interoperability enabler, providing information that is not apparent in the object itself: how old is it, when did it come into being, how was it made, where did it come from? Although the concept has been around a long time, the term metadata came about during the information technology (IT) age. Metadata is used to describe data about data or more broadly any information technology resource – data, services, knowledge stores, or other information types.
Geospatial metadata refers to IT resources which relate spatially to the Earth. It provides information which allows resources to be discovered by interested parties searching for resources, evaluated, accessed, and understood, enabling proper utilization. Metadata serves geospatial information IT resources throughout their lifecycle. It is both used and collected during the resource creation process. It is used to inform others of its availability and provide information to potential users as to the resourceʼs pedigree and ensure it is fit for purpose. When employing resources and creating new knowledge, the metadata is used to back up the decisions made and help validate what was accomplished.
To truly enable interoperability, metadata must be widely understood. Users need to understand what metadata needs to be produced and what should be available to understand a resource. The metadata must be understandable by anyone using it, no matter their language or cultural differences. This is what makes standardized metadata so powerful and important. To this end, many national geospatial metadata standards exist today as well as international metadata standards to promote global interoperability.
This chapter provides an introduction and background for metadata, defining the types of metadata and describing its uses. It also introduces national and international standards related to geospatial metadata and looks into the future of geospatial metadata and the advent of the semantic web.
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Abbreviations
- CAD:
-
computer aided design
- CEN:
-
Comité Européen de Normalisation
- CSDGM:
-
Content Standard for Digital Geospatial Metadata
- DIGEST:
-
Digital Geographic Information Exchange Standard
- DLG:
-
Digital Line Graph
- DTM:
-
digital terrain model
- FGDC:
-
US Federal Geographic Data Committee
- GIS:
-
Geographic Information System
- GML:
-
Geography Markup Language
- GNSS:
-
Global Navigation Satellite System
- HTML:
-
Hypertext Markup Language
- INSPIRE:
-
Infrastructure for Spatial Information in the European Community
- IS:
-
Implementation Specification
- IS:
-
International Standard
- ISO:
-
International Organization for Standardization
- IT:
-
information technology
- LIDAR:
-
light detection and ranging, Laser Scanning
- MD:
-
Oracle Multi-Dimension
- NSDI:
-
National Spatial Data Infrastructure
- OMG:
-
Object Management Group
- OWL:
-
Web Ontology Language
- RDF:
-
Resource Description Framework
- SDI:
-
spatial data infrastructure
- SDTS:
-
Spatial Data Transfer Standards
- SOA:
-
Service Oriented Architecture
- SPARQL:
-
SPARQL Protocol and RDF Query Language
- TC:
-
Technical Committee
- UML:
-
Unified Modeling Language
- URI:
-
Uniform Resource Identifier
- USGS:
-
United States Geological Survey
- VGI:
-
Volunteered geographic information
- W3C:
-
World Wide Web Consortium
- XML:
-
Extensible Markup Language
- gmdXML:
-
geographic metadata XML encoding
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Danko, D.M. (2011). Geospatial Metadata. In: Kresse, W., Danko, D. (eds) Springer Handbook of Geographic Information. Springer Handbooks. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72680-7_12
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