G3W-CLIENT: the cartographic viewer

Generic aspects

The application has a responsive interface consisting of expandable and reducible sessions.

The color of the interface depends on the type of user logged in.

The header contains the following elements:

  • Logo, title and subtitle, deriving from:

    • main title (set at General Data level) or MacroGroup name, according to the settings

    • Cartographic Group name

    • WebGis service title

  • Change map: which allows you to switch from one WebGis service to another (located within the same Cartographic Group) while maintaining extension and display scale

  • User ID: if you have logged in to the system

  • Credits

  • Home: to access the FrontEnd

  • Language: the choice of language is reflected in the individual menus of the map client and on the contents of the access portal. The languages available are those activated by the Administration.

_images/g3wclient_header.png

The Tools panel is located on the left and containing the following objects:

  • Metadata: content defined on QGIS project

  • Print: printing tool based on the layouts defined on the QGIS project

  • Search: with the search tools defined through the Administration panel

  • Map: containing:

    • Layers: structured list of layers, defined on the QGIS project

    • Base: choice of the base map from those defined at the creation level of the Thematic Group

    • Legend: graphic legend of the various layers

  • Tools: session that collects the various tools that may be activated on the WebGis service

_images/g3wclient_tool_panel.png

The centrally located map area presents the various navigation and map interaction controls, this controls are defined at the Cartographic Group level.

Tools panel

Metadata

The metadata reported in this session derive from those set at the QGIS project level.

This content is divided into three sessions: General, Space Info and Layers.

  • General: reports the metadata defined on the QGIS project in the item: Project Properties (QGIS Server session, Service Capabilities) In case of login as anonymous user the URL of the WMS service is shown.

  • Spatial: reports the EPSG code of the projection system associated with the QGIS project and the BoundingBox relating to the initial publication extension, defined in the item: Project Properties (QGIS Server session, WMS Capabilities, Advertised extent)

  • Layers: reports simple metadata associated with the individual layers.

_images/g3wclient_metadata_view.png

Print

Printing tool based on layouts defined on QGIS project.

The tool allows you to choose:

  • Template: print layout among those associated with the published QGIS project

  • Scale: print scale

  • DPI: print resolution

  • Rotation: rotation angle

  • Format: print to PDF or JPEG

On the map, a lit rectangular area will allow you to define the print area.

_images/g3wclient_print_tool.png

Search and Query Builder

A classic Query Builder is present at the Search menu level. Through this tool it is possible to:

  • carry out alphanumeric searches on geometric layers

  • save the query to reuse it until the end of the work session

  • edit a previously saved query

The Search menu contains the list of search tools defined through the Administration panel.

You choose the search you are interested in, fill in the required fields and click on the Search button.

The panel with the list of results will open on the right side of the client, for each result the first three fields of the associated table will be displayed.

By positioning on the individual results, the corresponding features will be highlighted on the map; clicking on the individual results you can consult all the attributes.

The drop-shaped icons will allow you to zoom in on the extension relating to the resulting overall features or that of the individual features.

The CSV icon allows you to download the attributes associated with the features in CVS format.

_images/g3wclient_search_example.png

Map

  • Layers: structured list of layers, defined on the QGIS project

  • Base: choice of the base map from those defined at the Cartographic Group creation level

  • Legend: graphic legend of the various layers

    The right button on the name of the single layer shows the following items:

  • Zoom to layer: to zoom in on the extension of the layer

  • Open the attribute table: to consult the associated attribute table

  • Download shapefile: to download the layer as a shapefile; available only for PostGis, SpatiaLite and GeoPackage layers, following activation of the function from the administration panel

  • Download XLS: to download the layer as a XLS; available for the main layer formats, following activation of the function from the administration panel

  • WMS URL: URL of the WMS service relative to the project or URL of the external WMS

The attribute table is equipped with paging function, highligth function and zooming to the associated features.

In the case of links to multimedia content, the previews of the images and/or the Open button will be displayed for consultation of different types of content.

A filter, applied generically to the contents of all the fields, will allow you to filter the list of displayed records.

_images/g3wclient_table_view.png