Metadata
Definition
Metadata, within the context of Geographic Information System (GIS), is essential data about other data. It succinctly outlines the basic attributes and characteristics of certain data, thereby providing a reference about such data. Essentially, it is data regarding data.
Metadata characteristically explains how, when, and by whom a particular set of data was created; and how the data is formatted and what its contents represent. Notably, metadata is crucial in GIS where it provides a description of spatial data including information on its creator, purpose, format, accuracy, projection, and attributes.
What is Metadata?
Metadata, in GIS, serves as an informative label that provides the detailed primary properties of specific data. It functions as a roadmap to ascertain a data set's region, structure, and functions, as well as the information for understanding necessary conditions to use a data module effectively.
This information is typically captured and organized in a metadata standard format that is universally understood by different metadata tools and systems. Popular formats include FGDC, ISO 19115 and Dublin Core, among others.
In dealing with spatial data, metadata carries more specific information such as geospatial data descriptions which grasp the origin, quality, condition, and other appropriate characteristics of the data in a geographic context.
FAQs
What are the uses of Metadata in GIS?
In GIS, metadata is pivotal for data organization and usability. It assists users in understanding and interpreting the content, quality, and relevance of datasets, hence allows them to assess whether the data is suitable for their particular use. It is also used in archiving historical data as it provides an understanding of old data modules, hence, assisting in preserving past information for future purposes.
What are the components of Metadata?
Common components of metadata include Title, Author, Description, Tags/Keywords, Creation/Modified Dates, Dataset Extent, Dataset Scale/Resolution, Datum/Projection info, Data lineage, Quality statement, Contact info, Usage restrictions among others.
Isn't metadata same as data?
No, metadata is not the same as data. While data is the primary unit of information, metadata describes that data. One can think of data as the content of a book, and metadata as the information on the book's cover.
Why is Metadata important in data analysis?
Metadata is fundamental in data analysis because it provides the details that enhance the understanding of information context, accuracy, and integrity. It assists in mapping the data formation process, sorting out valuable data, ascertaining data origin, and formulating methods to easily retrieve data. Consequently, it helps improve data quality and consistency.
