Cadcorp Web M

ap Layers

Web Map Layers is a sophisticated off-the-shelf application for Internet mapping. It provides advanced capabilities for presenting and interrogating spatial data, accessed through an easy to use and familiar style of interface.

Cadcorp Web Map Layers Web mapping for the Internet

Web Map Layers has been designed specifically for organisations wishing to share map-based information with a large community of non-expert users. This information can be considered as comprising a number of map layers, each of which is presented to a browser as a Web Map Service (WMS). Some map layers will be the property of the organisation itself, representing its own business data. Other layers will originate from outside the organisation, and may be the product of a national mapping agency for example.

Such WMS layers may be consumed directly from source, or managed by the application. Where attribute data exists, the layer can be considered as ‘intelligent’ and there may be a requirement to query that intelligence through the browser-based map interface.

The applicationWeb Map Layers offers a combination of generic viewing and interrogation capabilities out-of-the box. These include the following:

•   Map window controls. Watermark, copyright, key map, coordinate tracking, scale bar, zoom scale select, bookmarks, overlay controls

•   Navigation. Interactive mouse navigation, step zoom, zoom box, zoom extents, line and area measurement, information button

•   Printing. Print directly to local printer and add notes

•   Gazetteer. Generic – based on Access, SQL Server, Oracle, or PostGIS; specific – requiring integration with third party products

•  Redlining. Annotation, lines, polygons, symbols

The geospatial web services engineUnderpinning Web Map Layers is an advanced geospatial web services engine – GeognoSIS. This is capable of supporting both web mapping and more complex web GIS. In its web mapping role GeognoSIS acts a standalone Open Geospatial Consortium, Inc.® (OGC) Web Map Service (WMS). In its web GIS role GeognoSIS acts as a shared service to advanced geospatial methods which would otherwise be replicated on standalone and desktop GIS platforms.

As well as providing geoprocessing capabilities, GeognoSIS is also responsible for aggregating an organisation’s spatial data resources, prior to sharing the data with the web browser. It can do so either by reading the data at source,

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Manage map layers through intuitive controls

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without translation, and irrespective of the native data format; or by reading directly from a central spatial database. Cadcorp provides powerful tools for the administration of such spatial data in Oracle, PostGIS, and Microsoft SQL Server databases. These tools shield the users from the administrative complexities of database management.

Geospatial web servicesOrganisations are free to add additional functionality to Web Map Layers by writing their own web services. Cadcorp also offers a number of generic web services, which Web Map Layers is ready to hook into. These include:

•   About property. Identifies the polygons which intersect with, or contain, a property address or location

•   Find my nearest. Identifies features located within a defined buffer distance of a specified address or location

•   Spatial query. Creates custom queries based on existing feature geometry or user-defined polygons

AdministrationCadcorp also provides administrators with a powerful and user-friendly means of loading and manipulating spatial data, controlling the information displayed in the browser, and controlling access to that data. This is achieved through the Map Manager application. Map Manager is the means to create and manage a shared project file which allows the user to define the data, styling and cartography that will be used by Web Map Layers. Map Manager’s user-interface is graphical and geographical: it presents administrators with a graphical depiction of map overlays, as they will appear in the browser. This avoids administrators having to work with textual

descriptions of the characteristics of overlays, and having to imagine the visual impact of any administrative changes they may make.

The benefits of Web Map LayersMany organisations – public and private – are recognising the benefits of using internet mapping as an important channel of communication with the public. Web Map Layers provides a solution which goes beyond simple web map publishing, by offering the following:

•  an easy to use application with a familiar look-and-feel

•  the ability to integrate diverse data sources using industry-standard data formats

•  an extended ability to interrogate intelligent maps, not found in web map publishing systems

•  an infrastructure that can be deployed to drive other services and applications, at no additional licensing cost

Cadcorp | Computer Aided Development Corporation Ltd Sterling Court, Norton Road, Stevenage, Hertfordshire. SG1 2JY. UK

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Cadcorp, Cadcorp SIS, Spatial Information System, SIS, mSIS, apSIS, Powermap, MapTips, GeognoSIS, Map Browser, Map Reader, Map Viewer, Map Editor, Map Modeller and Roamer are trademarks, registered trademarks, or service marks of Computer Aided Development Corporation Limited (Cadcorp) in the UK, the European Community or certain other jurisdictions. Not all Cadcorp trademarks may be indicated here. Other companies and products mentioned may be trademarks, registered trademarks or service marks of their respective trademark owners.

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