CSW GSoC 2009 2nd meeting protocol

From MapbenderWiki

Participants

Armin Retterath

Christoph Baudson

Andreas Fischer

Arnulf Christl

Uli Rothstein

Contents 1 Summary 1.1 Relevant OGC Specs 1.2 Hints 2 Discussion 2.1 Test - Catalogues 2.2 Search Interface 2.3 Data Model 2.4 Internal Storage 3 Tasks 3.1 create data types 3.2 Implement CSW Client interface 3.3 Implement administration gui to map Mapbender search interface with service search capabilities 4 Links

Summary

Relevant OGC Specs

• Abstract
  • OpenGIS Catalogue Service Implementation Specification: http://portal.opengeospatial.org/files/?artifact_id=20555
  • most relevant pages:1-65 & 115-176
• For INSPIRE and for german use cases
  • OpenGIS Catalogue Services Specification 2.0.2 - ISO Metadata Application Profile (1.0.0): http://portal.opengeospatial.org/files/?artifact_id=21460

Hints

The older Cat's (pre 2.0.2) are not compatible with the new CSW 2.0.2 specification! Therefor the testing catalogues must support the new spec.

Discussion

• Distributed Search or Harvesting?
• Ranking?
  • Services
  • Catalogs
• Interfaces
  • OpenSearch
  • Portalu
  • CSW 2.x
  • Others?

Test - Catalogues

• CSW-2.0.2 AP ISO 1.0
  • http://gdi-de.sdisuite.de/soapServices/services/CSWDiscovery - SOAP 1.2, Conterra TestCatalog
  • http://213.144.28.209/csw - SOAP 1.2, PortalU DE Test-interface
  • http://78.46.82.146:80/csw/services - SOAP 1.2, BBSR
  • Based on newer geonetwork code
    • http://gesg.gmu.edu:8082/aq202/srv/en/csw?request=GetCapabilities&service=CSW&version=2.0.2
    • http://geonovum.nitg.tno.nl:8080/geonetwork/srv/en/csw?request=GetCapabilities&service=CSW&version=2.0.2
• CSW-2.0.2 (OGC)
  • http://apollo.erdas.com/apollo-catalog/wrs/WRS?request=GetCapabilities&version=2.0.2&service=CSW
  • http://geomatics.nlr.nl/excat/csw?request=GetCapabilities&service=CSW&version=2.0.2
  • http://geossregistries.info:1090/GEOSSCSW202/discovery?Request=GetCapabilities&Service=CSW&Version=2.0.2
  • http://www.geodata.alterra.nl/excat/csw?request=GetCapabilities&service=CSW

• Opensearch

Search Interface

Data Model

Simple structure

• Title
• Abstract
• Bounding Box (is delivered as GML)
• ID / (GetRecordByID) (link to query the original catalog)
• Catalog-ID (incremental)
• Capabilities URL
• ISO topic category (optional)
• Date (meta data set was modified at...)

Detailed set

• Use INSPIRE data model

Internal Storage

Store records (cache) only when selected by user.

Tasks

possibly implement SOAP in class connector

create data types

• Create abstract search service class; CSW_conf inherits from this abstract class
• JSON export

Implement CSW Client interface

Search interface

• single text field
• optinal: spatial restriction, use Mapbender's current extent (configurable: anywhere/intersects/within)
• optional: Inspire metadata profile
• optional: Restrict to data displayable on a map (WMS, layer, GML)

Result sets in list

• Symbols for result types (applications, services, metadata, optional: WMC, OWS Context)
• results as JSON
• map result sets to catalogs
• optional: load individual layers as WMS (some WMS have 1000+ layers)

Display results in map

• Zoom to extent
• Features with metadata in JS (Usemap)

Implement administration gui to map Mapbender search interface with service search capabilities

• Concept is similar to WFS
• There should be a table named cat and a table named cat_conf
  • Table structure cat
  • Table structure cat_conf
• Interface to assign the different cat_conf to a gui
• The concept should easiely be extended to other catalogue types.

CSW

• Load CSW
• Update CSW

CSW_conf

• Filter

gui_csw_conf

Links

• http://gos2.geodata.gov/ - for one html search template example
• http://www.gdi-de.org:8080/teamengine (register first, create new session), has some problems with ubuntu firefox 3.0.10 Clients
• http://geonetwork-opensource.org/