ISO 19115 metadata driver

[Kurt Schwehr]

source:trunk/gdal/frmts/hdf5/iso19115_srs.cpp​ is a start toan iso metadata driver. We could really use first class iso19115 read/write support. Less critical, but still important is to have FGDC read support (ASCII & XML).

I have a copy of ​ISO 19115:2003 Geographic information -- Metadata, but not ​ISO 19115-1:2014

ISO 19115-1:2014 defines the schema required for describing geographic
information and services by means of metadata. It provides information
about the identification, the extent, the quality, the spatial and
temporal aspects, the content, the spatial reference, the portrayal,
distribution, and other properties of digital geographic data and
services.

ISO 19115-1:2014 is applicable to:

-the cataloguing of all types of resources, clearinghouse activities,
 and the full description of datasets and services;

-geographic services, geographic datasets, dataset series, and
 individual geographic features and feature properties.

ISO 19115-1:2014 defines:

-mandatory and conditional metadata sections, metadata entities, and
 metadata elements;

-the minimum set of metadata required to serve most metadata
 applications (data discovery, determining data fitness for use, data
 access, data transfer, and use of digital data and services);

-optional metadata elements to allow for a more extensive standard
 description of resources, if required;

-a method for extending metadata to fit specialized needs.

Though ISO 19115-1:2014 is applicable to digital data and services,
its principles can be extended to many other types of resources such
as maps, charts, and textual documents as well as non-geographic
data. Certain conditional metadata elements might not apply to these
other forms of data.

Things to do before doing the driver:

• List of open source tools
• Collect a set of valid files from a range of domains
• List of references
• Make a wiki page of all this
• What is Content Standard for Digital Geospatial Metadata (CSDGM)?

References:

• ​FGDC Geospatial Metadata Standards
• ISO 19139 is an XML schema
• ISO 19115-2
• North American Profile (NAP) of ISO 19115
• ​https://en.wikipedia.org/wiki/Geospatial_metadata