Copyright © 2013 Open Geospatial Consortium.
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6.2.2.4 Accomplishments
Several key accomplishments were developed for OWS-9 within the data maintenance and publication architecture developed by Snowflake:
Data was consolidated from multiple sources and published using different AIXM 5.1 extension schemas into a single authoritative database. Access to these data
was provided via the WFS 2.0 and Event Publisher. The data was split spatially into North America and Europe sources for the WFS.
The WFS-T was configured to allow events to be inserted into the database. On insertion additional processes for publication were activated via Event Publisher
and WFS.
6.2.2.5 Challenges
Key challenges were identified when loading the AIXM source data.
1. Features without spatial property
There were a number of features types which do not contain a geometry property. It was thus difficult to separate these feature types into a North American and European
service.
2. Deeply nested Airspace by reference geometry elements
The source data for the Airspace feature type contain geometries with reference to geometry elements in other features which in turn could contain references to yet
more features. This nesting of geometry references could be several levels deep and proved too time consuming to sort out within the scope of the OWS9 project.
3. Issues with the source data
There were a number of issues with the source data geometry. For example Circle- by-Centre-point geometries with a zero radius value and Arc-by-Centre-point
geometries with a missing radius. Primarily, but not exclusively, this occurred within the Airspace feature type.
6.2.3 Registry Service
The Galdos INdicio™ Web Registry Service WRS was deployed in OWS-9 as an Aviation Registry to discover, manage, and retrieve aviation resources, such as metadata
and styling information. The INdicio™ Web Registry Service implements the Open Geospatial Consortium OGC ebRIM profile of the Catalogue Service for the Web
standard CSW-ebRIM 1.0.1, OGC doc 07-110r4. Galdos refers to this service as WRS for shorthand notation. The OGC Catalogue Service OGC document 07-006r1 is an
abstract catalogue standard that defines the basic notion of a Record i.e. registered item
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Copyright © 2013 Open Geospatial Consortium.
and the ebRIM profile applies a flexible registry information model to supplement the common interface Get, Insert, Update, Delete Records, etc.
The OWS-9 Aviation Registry was used to host resources shared between multiple OGC services e.g. ISO metadata pertaining to datasets common to multiple WFS
implementations Snowflake, Comsoft, Styling information shared between multiple Feature Portrayal Services FPS implementations Envitia, Luciad, and ISO Service
metadata describing the Services deployed in OWS-9. The efficient retrieval of metadata task was also implemented using the Aviation Registry by designing queries to retrieve
only the relevant excerpts of the metadata desired by clients. The participants used InsertUpdateGet transactions to create User accounts, publish common resources, and
efficiently retrieve resources using complex filtered queries. No functional or performance issues were encountered during the OWS-9 initiative.
Unlike conventional geographic catalogues, INdicio™ is highly configurable and can be readily deployed to manage a wide variety of objects.
INdicio™ ships with a CSW-ebRIM Basic Extension Package which provides a variety of useful objects for geospatial applications including:
Service taxonomy and Dataset metadata model source: ISO 191151911919139 via the preloaded OGC Cataloging ISO Metadata CIM Registry Information
Model. Feature data dictionaries and catalogues source: ISO 191091911019126.
Coordinate Reference Systems source: ISO 19111. Country codes source: ISO 3166-1 “Codes for the representation of names of
countries and their subdivisions – Part 1: Country codes”. Geographical regions source: UN Statistics Division.
Property categories based on Dublin Core source: DCMI metadata terms.
6.2.4 IDS Event Service
Kategori