GSoC 2015 Improved metadata for GRASS GIS

Title:	Improved Metadata for GRASS GIS
Student Name:	Matej Krejci, ​Czech Technical University in Prague
Organization:	​OSGeo - Open Source Geospatial Foundation
Mentor Name:	​Martin Landa, Angelos Tzotsos, Luca Delucchi
GSoC proposal:	​view proposal
Link to code:	​tmp dir
Documentation:

Abstract

Current GRASS GIS offers ISO-based Metadata support. This package includes three modules designed to generate, create and edit metadata. The goal of this work consist of two main parts. First aim is to improve current package by adding a few functionality for extend metadata handling. The second goal is to implement module for interaction with metadata catalogue services (CSW). Additional benefit of this part allows access of metadata between GRASS GIS and QGIS MetaSearch plugin.

Timeline

timeline from proposal
		status
MAY 25	Starting GoSC	*
MAY 25 - 29	Implementing support for exporting metadata (report) to PDF	*
JUN 1 - 5	Adding an option for fetching predefined metadata values from database	*
JUN 8 - 12	Adding metadata support for Temporal GIS	*
JUN 15 - 19	Testing, debugging g.gui.metadata
JUN 22 - 26	Getting more familiar with pycsw and owslib python library
JUN 29 - 31	Designing csw module (g.gui.metadatacsw)
JULY 6 - 10	Implementing manager for connection to service (service info, “getCapabilities” response, add/delete service, edit service)
JULY 13 - 17	Adding support for publishing metadata to csw
JULY 20 - 24	Design and implementation module for establishing csw on localhost PC (pycsw)
JULY 27 - 31	Design and implementation of catalogue browser based on filtering by bounding box and keywords
AUGUST 3 - 7	Adding interface for connecting r.in.wms, v.in.wfs with g.gui.metadatacsw
AUGUST 10 - 14	Implementing function for metadata management on local csw (removing, harvesting from remote csw )
AUGUST 17 - 23	Testing, polishing code and writing documentation
AUGUST 24	Ending GoSC

Requirements

​GRASS 7.1

Dependencies

Current development of wx.metadata package has dependence on external libraries:

• OWSLib (no additional dependence) development version ()

  git clone git://github.com/geopython/OWSLib.git
  cd OWSLib && sudo python setup.py install
  

• Jinja templates

  git clone git://github.com/mitsuhiko/jinja2.git
  cd jinja2 && sudo python setup.py install
  

Development

Pdf reports

used library: ​reportlab.platypus

Weekly reports

Week 1 (May 30)

• Designed and implemented support of creating pdf reports of metadata.
• Fixed some defects in metadata editor which arose from changes in GRASS core.

​changeset

​video

​report email

Week 2 (June 8)

• Added widget which supports fetching metadata thesauri from database
  • Added few metadata thesauri to database
• Added widgets for atrributes with explicit values

​changeset

​report email

Week 3-4 (June 14-21)

Due to exam block at university I worked less than I proposed in timeline.

• Try to get familiar with ISO 19108
• Designed ISO profile for temporal framework.
• Added support of temporal metadata to g.gui.metadata module.

​changeset

​report email ​report email

TODO&IDEAS