METAMOD 2.x is a portal solution providing Discovery, Access and Retrieve functionality for scientific datasets along with tools for metadata handling etc. It allows for automatical and manual DAR Metadata creation. The Metadata can be converted to different formats and exposed using different search-interfaces, i.e. ISO23950 and OAI-PM. METAMOD 2.x has been designed to be easily integratable with OpENDAP or ftp data-servers, i.e. THREDDS and allows data-upload through FTP and HTTP interfaces.

METAMOD 2.5.0 released

METAMOD 2.4 was not released (only used for internal reasons). Changes in 2.5: Improvements in WMS implementation, support for registering files in an existing repository. Other minor improvements.

METAMOD 2.3.0 released

New features: General text search, methods for re-projecting 2D data, methods for connecting to WMS server, module for automatic update of THREDDS catalog. Improvements in PMH server and dataset administration.

METAMOD 2.2.0 released

This release implements a two-level view of datasets. At the highest level, datasets representing several files are described. Details of each file are described at the second level.

METAMOD 2.1.0 released

METAMOD 2.0.0 released

The purpose of the METAMOD 2.x software is threefold:

• To manage a local data repository with scientific data files.
• To manage a database with metadata for scientific data sets. Data sets are collections of data files, either in the local repository, or in external repositories.
• To provide a web portal for searching and browsing the metadata database.

As additional projects were seen to benefit from using METAMOD 2.x software, a need for making the software independent of a single project emerged. This was obtained by organizing the software in different modules, and by separating all project specific aspects into a configuration file. METAMOD 2.x now comprise the following modules:

The configuration file describes an actual implementation of a web application based on METAMOD 2.x software. First of all, the file lists which of the six modules that are used in the application. Any combination of the four modules is allowed. If the METAMODBASE module is not a part of an application, the configuration file must identify a database owned by another application where the METAMODBASE module is used. In this way, several applications may share the same database.

The software is implemented on a Linux system with Apache web server. PHP is used to implement dynamic web content, and Perl is used to implement tasks not directly involving web content generation. The database is based on PostgreSQL. Metadata elements use controlled vocabularies from GCMD and CF1.0 as well as WMO keywords. Tools for extracting metadata from NetCDF/CF files are part of METAMODUPLOAD. Access to the actual data files are provided as links from the web pages generated by the METAMODSEARCH module.

The local data repository is an ordinary file system where files are orginized in catalogs according to institutions (data providers) and data sets. The catalogs and files must be accessible through URLs. This can be done using HTTP, FTP, OPeNDAP or a combination of these protocols. The DAMOCLES application use a THREDDS Data Server (giving OPeNDAP and HTTP access). If the data files satisfy OGC standards, THREDDS may also provide OGC WCS access.