OPeNDAP Aggregation Server Guide
Version 1.5

This document describes version 0.6 of the OPeNDAP Catalog/Aggregation Server, a service designed to create logical groupings of individual data files. The individual files may be local netCDF files, or remote files, served from an OPeNDAP server. Using the Aggregation Server, you can effectively merge these disparate files into what seems to be one larger file, which may be sampled using the standard OPeNDAP constraint expressions. The files need not be local files, nor need they be on the same remote server.

You can also use the Aggregation Server to serve individual netCDF files.

This document assumes you are familiar with the operation of OPeNDAP servers and software. If this is not the case, you may want to consult The OPeNDAP User Guide or The DODS Quick Start Guide first. You will also need a basic understanding of the syntax and construction of XML documents.

• 1 Theory
  • 1.1 Methods of Aggregation
  • 1.2 A little more detail
    • 1.2.1 JoinNew Aggregation
    • 1.2.2 JoinExisting Aggregation
    • 1.2.3 Union Aggregation
• 2 Practice I: Installing the OPeNDAP Catalog/Aggregation Server
  • 2.1 Install Jakarta-Tomcat Server
  • 2.2 Locating the Configuration File
  • 2.3 Setting Cache Sizes
• 3 Practice II: Configuring the OPeNDAP Catalog/Aggregation Server
  • 3.1 How it works
  • 3.2 Dataset URLs
  • 3.3 Mapping Datasets to Internal Files
  • 3.4 Using the Aggregation Server as a NetCDF server
  • 3.5 Dataset Aliases
  • 3.6 Multiple Aggregation elements
• 4 Configuration Elements and Attributes Specification
  • 4.1 Aggregation Server Configuration Elements
    • 4.1.1 aggregation
    • 4.1.2 fileAccess
    • 4.1.3 variable
    • 4.1.4 fileScan
  • 4.2 THREDDS Catalog Configuration Elements
    • 4.2.1 access
    • 4.2.2 catalog
    • 4.2.3 catalogRef
    • 4.2.4 dataset
    • 4.2.5 documentation
    • 4.2.6 metadata
    • 4.2.7 property
    • 4.2.8 service
• A Acronyms
• Index