Additional GIS Layers
Web Map Service (WMS) images, ArcGIS Server Map Service images and other GIS background layers can be displayed behind the network in the GeoPlan Window.
InfoWorks ICM can:
- Save sets of one or more GIS background layers in the master database and then re-load them later in any network. For more details, see Layer Lists.
- Choose to open previously used layers each time the network is opened. For more details, see Options - GeoPlan Page.
- Find objects in additional GIS layers.
The path and filename of the files containing map layers is stored. If the files are moved from the location specified InfoWorks ICM will be unable to reload them.
Relative Path If a map layer file is in, or below,
Displaying additional GIS layers
To display a GIS background layer:
- Right-click on the GeoPlan Window and select GIS Layer control from the popup menu. This displays the GIS Layer Control dialog.
- Click Add and use the subsequent dialog(s) to choose the files to be loaded. Click Open or Add.
- Click OK in 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 Properties 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 Properties:
- 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 GeoPlan Window (see Selecting the Coordinate System for details).
Individual layers loaded into the GeoPlan may also have associated coordinate system information.
- If a Projected Coordinate System has already been assigned to the GeoPlan View, a coordinate transformation is applied mapping from the layer's coordinate system to the GeoPlan's Projected Coordinate System.
- If there is no (i.e. Unknown) Projected Coordinate System assigned to
the GeoPlan Window, the following rules apply:
- To add a layer with an associated Geographical Coordinate System, the GeoPlan Window 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 GeoPlan 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 GeoPlan Window. 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 on the GeoPlan Window and select GIS Layer control from the popup menu to display the GIS Layer Control dialog.
- In this dialog, click Zoom Levels or Map Scales to access the Layer Visibility dialog.
- In 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.
