Web Map Service (WMS) images, ArcGIS Server Map Service images and other GIS background layers can be displayed behind the network in the Map view .
Layers set in the two above-mentioned drop targets will always be loaded by default. If additional layers are needed, these can be added by the user via the GIS Layer Control dialog (accessible from the Layer Control option of the context menu on the Map view in both IWLive Pro Administrator and IWLive Pro Operator).
Displaying additional GIS layers
To display a background layer:
- Right-click the Map view and select Layer Control from the popup menu. This displays the GIS Layer Control dialog.
- Click the Add button and use the subsequent dialog(s) to choose the files to be loaded. Click Open or Add.
- Click OK on the layer control dialog to display the layer and close the dialog, or click Apply to display the layer while keeping the dialog open. (By default, when displaying WMS layers, only the first twenty sub layers are marked as visible. To edit the visibility settings, click the Properties button to display the Web Map Service Properties dialog).
CAD multi-patch layers are not currently supported. These layers will be ignored if selected for addition.
Layer properties can be adjusted by selecting the layer in the GIS Layers box and clicking the Properties button:
- The Layer Properties dialog will be displayed if the currently selected layer is not a WMS layer
- The Web Map Service Properties dialog will be displayed if the currently selected layer is a WMS layer
The functionality mentioned above is not available for ArcGIS Server Map layers (Properties button disabled). Use your GIS software to view the properties of this type of layer.
Move the layer above or below other layers using the Up and Down buttons.
Adding layers with coordinate systems
A projected coordinate system can be assigned to a Map view (see Setting the coordinate system for details).
Individual layers loaded into theMap view may also have associated coordinate system information.
- If a projected coordinate system has already been assigned to the Map view , a coordinate transformation is applied mapping from the layer's coordinate system to the Map view 's projected coordinate system.
- If there is no (i.e. unknown) projected coordinate system assigned to the
Map view
, the following rules apply:
- To add a layer with an associated geographical coordinate system, the Map view must have an assigned projected coordinate system. A warning message will be displayed in the GIS Layer Control dialog and the layer will not be loaded if the Map view does not have an assigned projected coordinate system.
- If the lowest layer added (i.e. layer at the bottom of the list in the layer control dialog) has an associated projected coordinate system, the projected coordinate system of that layer will be assigned to the Map view . A warning message will be displayed in the GIS Layer Control dialog if this occurs.
Displaying layers at different zoom levels
A layer can be set to be displayed between specific zoom/scale levels via the GIS Layer Control dialog:
- Right-click the Map view and select Layer control from the popup menu to display the GIS Layer Control dialog.
- On this dialog, click the Zoom Levels button or the Map Scales button to access the Layer Visibility dialog.
- On the Layer Visibility dialog, check the Show layer between these zoom levels / scales box and enter Min Zoom /Scale and Max Zoom / Scale values between which the layer will be displayed.