Systematized gathering and maintenance of the spatial information leads to establishment of methods for efficient sharing, distribution and use of the data. Management of the processes of data creation, development, normalization, maintenance and updating requires data documenting, i.e. metadata forming, that allows to extend a list of products and services related to the spatial information, to use spatial data and electronic services for regulation of different issues in various fields and areas of activity.
Metadata by technical interpretation are the data about data, i.e. data describing information.
Metadata allow efficient use of spatial data and associated electronic services. It is necessary for a customer to be informed of these or those data and services in order to define compatibility of the data with the purpose of their use.