Inland Electronic Navigational Chart (IENC) means: the database, standardized as to content, structure and format, for use with inland electronic chart display and / or information systems operated onboard of vessels transiting inland waterways. An IENC is issued by or on the authority of a competent government agency, and conforms to standards [initially] developed by the International Hydrographic Organization (IHO) and [refined by] the inland ENC Harmonization Group (IEHC). An IENC contains all the chart information necessary for safe navigation on inland waterways and may contain supplementary information in addition to that contained in the paper chart (e.g. sailing directions, machine-readable operating schedules, etc) which may be considered necessary for safe navigation and voyage planning.
Web feature service concerns to the points extracted from the "Ring Access" database wich contain a ring information management, control and recovery of rings. The data are in point format corresponding to the place where the the ringing or recapture of the ringed bird was performed. This feature service corresponde to the marine and coastal species.
Management plan of the Tejo Estuary Natural Reserve published by the RCM nº177/2008 of 24 November. Represents one of the map produced in the space planning third phase of the Plan, published at 1:25000 scale. Delimits space classes, depending on the dominant use and establishing operative units of planning and management. The use of this resource does not exempt the consultation of the official documents.