Figure 0: The cids Navigator
The cids product suite consists of a set of services, applications, software components, management tools, development tools, and application programming interfaces (APIs) for the management, integration, and development of heterogeneous information systems with a special focus on interactive geo-spatial systems. It provides a distributed integration platform, which is particularly useful for workflows that need a combination of information and processes from different source systems such as GIS systems, relational databases, and simulation models. In this way it already provides and supports a considerable number of functionalities required for complex geospatial information systems, including user management and access control, search and discovery of relevant information and advanced interactive 2D visualisation (OGC WMS and WFS clients).
Figure 1: cids Client-Server Architecture
Figure 1: cids Client-Server Architecture shows that the SMS Framework is based on a client-server architecture in which an arbitrary number of client instances and server components co-exist in a service network, thus ensuring scalability and reliability. The components shown in Figure 9 are explained in detail in the following sections. The main building blocks of the framework are the Navigator (client), the Kernel, and a set of system management tools. The building blocks and the components are shown in Figure 2: Framework Building Blocks.
Figure 2: Framework Building Blocks
The Kernel represents a network of distributed services and consists of the following four components:
The Navigator, shown as a customized version in Figure 0, is the default client for user interactions with the system. It offers a uniform, user-specific view of the integrated information systems and is particularly useful for cross-system search and retrieval in space, time, and textual content. It can also be used to manage the information in the network. It can be use e.g. as the management client for OGC compliant data access and model execution services, which are described as customised information classes in the underlying meta data model, thus offering common functionalities for the various users of the system. The Navigator features a plug-in mechanism that allows to easily integrate custom extensions in order to support workflows for specific end user tasks. The Navigator provides the following core functionalities through dedicated GUI components:
Figure 4: Catalogue Attribute View
Figure 5: Catalogue Node and Object Management
Search There is a highly customisable interface to the dynamic search capabilities of the Kernel, which takes a combination of different meta object attributes into account to provide thematic search to end users. It also features sophisticated geospatial search capabilities and direct interaction with the Map Component.
Renderer Renderers are used to provide thematic, context and user dependent views on certain topics. The Navigator is equipped with a set of default Renderers for a variety of different object types and supports the integration of a customised Renderer on a per-object class basis. Figure 6: Custom Rainfall Render as Client for OGC SOS shows a custom Renderer that communicates with a Sensor Observation Service
Figure 6: Custom Rainfall Render as Client for OGC SOS
Figure 7: Default Attribute Editor
The Map Component shown in Figure 8: Map Component (cismap) is based on cismap, a highly sophisticated 2D map viewer for geo data services such as Web Map Services (WMS) and Web Feature Services (WFS) which comply with the standards of the Open Geospatial Consortium (OGC). Since cismap supports both powerful visualisation and editing functionalities for geospatial information (including arbitrary geolocated meta objects), it can support geospatial information systems end users during configuration, management and decision and planning tasks. Some of the main features of cismap are
Figure 8: Map Component (cismap)
The cids product suite provides, in addition to the client and server components described in the previous sections, a set of System Management Tools. They support system managers during the installation and maintenance of the SUDPLAN applications as well as modellers during the integration and configuration of mathematical models to be used within SUDPLAN applications. They can also be used to carry out general system administration tasks like user management. The System Management Tools include the following.
Figure 9: Administrators Best Friend (ABF)
Figure 10: Server Console
Figure 11: JPresso
An application, based on cids components and tools described in this document, already fulfils most of the technical requirements of a generic geospatial infrastructure, open source components, web-based technologies, user-friendly graphical interfaces, security and access control mechanisms, and scalability. It represents a sound basis for the implementation core functionalities of complex geospatial informations systems like resource discovery, sharing and publishing of information and automation of tasks.
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