Web AppBuilder for ArcGIS (Developer Edition)

Threat Analysis widget

(Added at v2.11)

Public safety personnel and first responders are tasked with identifying safe distances and zones when planning events. For example, should an explosion occur at a location susceptible to attack, personnel want to be prepared with an understanding of what perimeters to set up, and what areas to evacuate.

Configure the Threat Analysis widget

This widget can be set to open automatically when an app starts. To enable this feature, click the Open this widget automatically when the app starts button Open this widget automatically when the app starts on the widget, which turns it dark green.

  1. Hover over the widget and click the Configure this widget button Configure this widget to open the configuration properties dialog box.
  2. Optionally click the Change widget icon button to replace the widget icon with your own image.

    A file explorer window appears, allowing you to select a local image file to use as the widget icon.

  3. For Mandatory Evacuation Distance, you can set the following:
    • Outline—Choose the color, transparency, and style.
    • Fill—Choose the color, transparency, and style.
  4. For Safe Evacuation Distance, you can set the following:
    • Outline—Choose the color, transparency, and style.
    • Fill—Choose the color, transparency, and style.
  5. Click OK to save your settings and close the Configure Threat Analysis window.

Use the Threat Analysis widget

You can create and change the appearance of evacuation zones in multiple ways.

Evacuation zone settings

Open the zone creation settings dialog box to change the settings.

  1. For Mandatory Evacuation Distance, you can set the following:
    • Outline—Choose the color, transparency, and style.
    • Fill—Choose the color, transparency, and style.
  2. For Safe Evacuation Distance, you can set the following:
    • Outline—Choose the color, transparency, and style.
    • Fill—Choose the color, transparency, and style.

Create evacuation zones

Learn how to create evacuation zones from the map using fixed locations or existing features, or by interactively selecting locations.

Create zones interactively

You can create evacuation zones interactively by drawing locations on the map.

  1. From the Input Location drop-down list, choose Interactive.
  2. Select either the Point, Polyline, or Polygon drawing tool and draw a feature on the map.
  3. From the Threat Type drop-down list, choose a threat type.
  4. From the Units drop-down list, choose Feet or Meters.
  5. Click Create Zones.
  6. Optionally click Publish after the zones have been created to save them as a hosted feature layer.

Create zones from fixed coordinates

You can create evacuation zones from fixed coordinates.

  1. From the Input Location drop-down list, choose Fixed Coordinate.
  2. Enter a coordinate in the Threat Location text box and press Enter, or use the Add Threat Location tool to select a location on the map.
  3. From the Threat Type drop-down list, choose a threat type.
  4. From the Units drop-down list, choose Feet or Meters.
  5. Click Create Zones.
  6. Optionally click Publish after the zones have been created to save them as a hosted feature layer.

Create zones from existing features

You can create evacuation zones by selecting existing features from the map.

  1. From the Input Location drop-down list, choose From Existing Features.
  2. From the Select Feature From This Layer drop-down list, choose the layer that contains the features you want to select.

    Note:

    Currently, layers based on feature collections will display in the Select Feature From This Layer drop-down list, but the features contained within are not supported as selectable inputs.

  3. Click the Extent tool and select features from the map.
  4. From the Threat Type drop-down list, choose a threat type.
  5. From the Units drop-down list, choose Feet or Meters.
  6. Click Create Zones.
  7. Optionally click Publish after the zones have been created to save them as a hosted feature layer.

Publish evacuation zones

Publish evacuation zones as a hosted feature layer to a portal or organizational account.

  1. Type a name for the hosted feature layer in the Published Layer Name text box.
  2. Click Publish.
  3. On the Sign In dialog box, enter a user name and password.
  4. Click OK.