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GNS Web Maps

The web map page consists of several panels that work together.

Buttons: The left-hand panel contains a set of buttons that allow you to interact with the map. See below for description of each button.
Map: The middle panel contains the map and an optional overview map in the top left-hand corner.
LayerList/Legend: The right-hand panel can contain either a legend for the map or a list of layers. You can use the layer list to turn layers on and off by checking the Visible box and pressing the Refresh Map button. One layer can be set as the Active layer - this is the layer that that some of the buttons (eg Identify) will operate on.
Note: the list of layers may change as you zoom in and out on the map.

Each of the buttons work as follows. Note: not all buttons will be available in all web maps

Toggle between legend and layer list Switches back and forth between a legend with symbology and a layer list with visibility options.

Toggle overview map Adds and removes the overview map from the map display area.

Zoom in Zooms in to area of the map that you click or drag a box around.

Zoom out Zooms out from the area of the map that you click or drag a box around.

Zoom to full extent Zooms to the full extent of the map.

Zoom to active layer Zooms to the full extent of the active layer.

Zoom to last layer Zooms to the previous extent.

Pan Pans the display in the direction that you drag the mouse pointer.

Pan North Pans the map to the North.

Pan South Pans the map to the South.

Pan West Pans the map to the West.

Pan East Pans the map to the East.

Identify Displays attribute information for the feature that you clicked - make sure the layer you want to identify is marked as the active layer.

Query Searches for features based on a query expression.

Search Searches for features based on the information you enter.

Find Finds map features with an attribute value matching a string that you type.

Measure Measures distances on the map.

Set units Sets the units for the measure tool.

Create buffer Selects the features of one layer that are within the specified buffer distance of selected features of another layer.

Select by rectangle Selects the group of features contained by or in contact with a rectangle you draw on the map.

Select by line/polygon Selects the group of features contained by or in contact with a line or polygon you draw on the map.

Clear selection Clears the selected set of features.

Locate address Locates a street address on the map.

Print Generates a new page that you can print.

Help Shows this, and other map specific help text.