6.4.16 Portrayal model
From Geostandards
6 INSPIRE
6.1 Background and Motivation
- 6.1.1 Spatial Data Infrastructures
- 6.1.2 Requirements for a European SDI
- 6.1.3 Existing foundation for a European SDI
- 6.2.1 Background and history
- 6.2.2 The five components of the Directive
- 6.2.3 Implementation, status and schedule
- 6.2.4 Groups and responsibilities within INSPIRE
- 6.2.5 INSPIRE Implementing Rules and INSPIRE Guidance Documents
- 6.2.6 European and Global initiatives in the context of INSPIRE
6.3 Technical Architecture Overview
- 6.3.1 Relationship between the different components, in particular spatial data, metadata, registers, and network services
- 6.3.2 Terminology
6.4 Interoperabilty of spatial data sets / INSPIRE data specifications
- 6.4.1 Requirements of the INSPIRE Directive
- 6.4.2 Interoperability of spatial data
- 6.4.3 INSPIRE data scope
- 6.4.4 Modelling Framework
- 6.4.5 Generic Conceptual Model
- 6.4.6 ISO 19100 series of International Standards
- 6.4.7 Rules for application schemas and feature catalogues
- 6.4.8 Identifier Management
- 6.4.9 Object referencing modelling
- 6.4.10 Coordinate referencing
- 6.4.11 Multi-lingual text and cultural adaptability
- 6.4.12 Data quality
- 6.4.13 Metadata for evaluation and use
- 6.4.14 Multiple representations
- 6.4.15 Consistency between data
- 6.4.16 Portrayal model
- 6.4.17 Conformance
- 6.4.18 Generic Network Model
- 6.4.19 Gazetteers
- 6.4.20 Encoding and data formats
- 6.4.21 INSPIRE registers
- 6.4.22 Annex I data specifications
- 6.4.23 Outlook to Annex II/III data specifications
- 6.4.24 Extensions by countries or communities
There is no requirement in the Directive about portrayal, but to guarantee that spatial data is portrayed consistently in view services, basic rules are specified in the INSPIRE data specifications. However, since proper cartographic visualisation is out-of-scope of INSPIRE, portrayal is currently only addressed from the perspective of a single theme only. The view service is not understood as a capability to create quality maps, but a capability to view the data. The styles and layers of the current data specifications allow that.
The OGC Styled-Layer Descriptor and OGC Symbology Encoding standards are used to specify portrayal rules in INSPIRE.
The basic rules are that
- each spatial object which is geo-referenced is rendered in at least one layer of a view service;
- for each layer, one default style to be used for portrayal is specified;
- In cases where no agreed/standardised style exists in a community for the portrayal of a layer, a very simple default style is specified in the Generic Conceptual Model.
A data specification may specify additional styles as required. However, the default style will be shown by a view service, if no specific style is requested.
Portrayal rules for gridded data have yet to be specified.
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