ogm_utils

Some basic python tools for working with OpenGeoMetadata repositories. Currently only FGDC CSDGM XML metadata is supported.

shell scripts

repofind and repowrite are shell scripts that act as a front end to the utilities.

repofind finds metadata in the repository given the layer id and returns the path as well as a listing of metadata types available. Currently, it simply examines layers.json to find the path, verifies that it exists and lists the contents.

switches:

• '-r' or '--repository': repository path. Defaults to directory 'REPO_PATH' specified in repo_utils.py.
• '-i' or '--layer_id': unique id for the data layer described by the metadata. REQUIRED

repowrite writes metadata to the repository using a hash of the layer id to create the directory structure. Once written, layers.json is updated. Using a hash ensures that the path in the repository is computable given the layer id. Currently, it uses the FNV-1a hash. The OpenGeoMetadata repository is specified by the constant REPO_PATH.

switches:

• '-r' or '--repository': repository path. Defaults to directory 'REPO_PATH' specified in repo_utils.py.
• '-i' or '--layer_id': unique id for the data layer described by the metadata. REQUIRED
• '-m' or '--metadata': path to the xml metadata file. REQUIRED
• '-o' or '--overwrite': boolean 'true' or 'false' to overwrite existing metadata. Defaults to 'false'.

python files

repo_utils.py has functions for working with layers.json, writing and finding metadata.

repo_dir.py contains the logic for creating the directory structure. If you would like to use these utilities, but require a different directory structure, you can modify this file. Specifically, the functions get_directory and get_hash_dir are dependencies in other scripts.

metadata_type.py contains logic for determining metadata type. It also returns an ElementTree given an XML string.

ogp_to_repo.py queries an OpenGeoportal Solr instance and writes metadata from the response to an OpenGeoMetadata repository. The Solr instance is specified by the constant SOLR_URL. The OpenGeoMetadata repository is specified by the constant REPO_PATH in repo_utils.py