This tutorial explains the most important menu items (widgets) of the webviewer. Every widget has a full description on the Esri website. Click the headers of the paragraphs to find these full descriptions.

1. Grouped layer list

This widget provides a layer list that is organized by the main seven GIStorical snapshots. Every group consists of one or more layers focusing on different themes. Every layer can be turned on and off using the toggle buttons.

Each layer within a theme has potential options for:

  • changing the layer transparency
  • enable/disable popups
  • changing the layer symbology
  • viewing attribute table

The availability of these options for a layer within the widget is dependent upon the layer type so not all layers will have all the options listed.

2. Basemap Gallery

 The Basemap Gallery widget presents a gallery of basemaps and allows you to select one from the gallery as the basemap. The basemap can be user defined or from your organization or portal. Clicking the Basemap Gallery widget displays all the basemaps configured for this widget. Clicking a basemap thumbnail sets it as the active basemap for the app. Click the x in the upper right corner of the Basemap Gallery window to close it.

3. Legend

​The Legend widget displays labels and symbols for layers in the map. It supports dynamic, tiled, image, feature, and KML layer types as well as WMS layers with an associated legend URL. The Legend widget can be set to automatically update when the visibility of a layer or sublayer changes. When no operational layers are rendered in the map, the Legend widget is blank.

4. Swipe

The Swipe widget enables you to easily compare the content of different layers in a map. It the current configuration of the webviewer, it provides a horizontal view mode but vertical and spyglass view modes could be configurated as well. You can slide the swipe tool or move the mouse around to reveal the content of another layer. For example, you may want to use it to show before-and-after imagery of a flood, or display two related thematic layers in a map.

5. Share

The Share widget allows you to share the webviewer by posting it to your social media account, sending an email with a link, or embedding it in a website or blog. It also provides an easy way to define URL parameters for the webviewer.

6. Print

The Print widget connects the webviewer with a printing service to allow the current map to print. Click the Print button to open the Print widget. Type a title for the map in the Map title text box. Select the applicable Layout and Format for the exported map. There is also an advanced menu. Check out the extended tutorial at Esri via the header of this paragraph. After all options have been set with the applicable values, click Print to submit all information to the print service. A progress bar displays next to the executing task. Finally, click the task to open the file in a new window.

7. Select

The Select widget enables you to interactively select features on the map and take actions on the selected features.

The following steps explain how to use the Select widget:

  1. Click the Select widget icon to open it.
  2. Choose the layer or layers you want by checking the box.

    You can also make all layers selectable or de-selectable, or toggle layers select ability by clicking the button at the up-right corner of the panel, inline with Layer.

  3. Hover over the Select button. You can Select By Rectangle with the following actions:
    • Drag the pointer on the map to create a new selection.
    • Press the Shift key while dragging the pointer on the map to add selected features to the selection.
    • Press the Ctrl key while dragging the pointer on the map to remove selected features from the selection.
  4. Click Select and draw on the map to select features. If more than one selection tool is configured, click the arrow on Select to choose the tool in the menu.

    The number of selected features display next to the layer.

  5. Click the ellipsis (…) to open the Selection Actions menu.
    • Click one of the actions, for example, Statistics. Choose the field you want to see for the statistics.
    • Click Create Layer to create a new graphic layer on the map. You can turn it on and off in the Layer List widget. This is only a temporary layer that will not be stored on our platform!
  6. Click Clear to clear all the selections.​

8. Filter

The Filter widget allows you to limit the visibility of features in a layer. Only the features that meet the expression criteria will be visible in the map. Accordingly, other menu items, if applicable, will respond to the change it makes in the layer. Click the menu item. Click the black button with the white dots in the right corner below.

  • Create a custom filter—Define your own filter to find and display features in the layer based on attribute values in its data. Choose a layer, click Add expression or Add set, and build an expression.
  • Reset filters (except custom)—Reset the Filter widget to the app's default settings. If you created a custom filter, it will remain unchanged.
  • Turn off filters (except custom)—Turn off the app's filters and zoom to the initial map extent. If you turned on a custom filter, it will remain on. Click the Create a custom filter button and turn off your custom filter separately.

​9. Add data

The Add Data widget enables you to add data to the map by searching for layers in ArcGIS content, entering URLs, or uploading local files. In this way, you can temporarily add layers to and remove layers from the map. However, you can't save the layers to the map.

  1. On the Search tab, choose the scope you want to search, and then click the Add Data widget.
  2. In the Add Data window, search for the data you want to add to the map. Click Add on the specific item.

    The added layer will appear in the Layer List widget as well. Click Remove to remove the layer from the map and the Layer List widget. Click Details to get information about the layer.

  3. Optionally click the search button to search for layers.
  4. To search only layers within the map area, leave the toggle button  green, which is the default. To search all layers in the scope, click the toggle button, which turns it red.
  5. Click the sort button  to refine the type of search layer and sort the items.
    • Click the Type drop-down list to search layers based on type, including map service, feature service, image service, vector tile service, and KML, WMS, WFS, and WMTS layers.
    • Click the Sort By drop-down list to sort items by relevance, title, owner, rating, view, or date.
  6. If available, click the URL tab next to the Search tab to add layers by URL. Choose a type and enter the URL. Click Add to add the data to the map.Click Sample URL(s) to see the URL format for each type.
  7. If available, click the File tab to upload supported local files. You can either drag the file or browse to it.
  8. To remove the layers you added, click Layers in the lower right corner of the widget. In the Layers panel, click the Remove Layer button  next to the layer to remove it.
  9. Click Back in the lower right corner to return to the main panel.

10. Measurement

The Measurement widget allows you to measure the area of a polygon or length of a line, or find the coordinates of a point.

Location: Click the Location button  and click a location on the map. The Measurement widget displays the coordinates for the point in degrees (decimal). To change the coordinate display format to degrees/minutes/seconds, change the selection in the Degrees drop-down menu to DMS.

Distance: Click the polyline button. Draw a polyline on the map by clicking two or more points. Double-click to finish drawing the polyline.The Measurement widget displays the total length of the polyline using the defined Default Length Unit. To change the length unit, select the applicable unit of measure from the Miles drop-down menu.

Area: Click the Area button. Draw a polygon on the map by clicking three or more points. Double-click to finish drawing the polygon. The Measurement widget displays the total area of the polygon using the defined Default Area Unit. To change the area unit, select the applicable unit of measure from the Acres drop-down menu.

11.  Draw

The Draw widget allows you to draw simple graphics and text on the map. You can also use it to add line distance or polygon area to the feature as text. Drawn items can be printed.

12. About

This widget shows information about the creators and sponsors of the GIStorical Antwerp webviewer.

Data requests and feedback

Data request

The GIStorical webviewer only shows a section of the available fields per layer. If you are a researcher, professional data analyst or other professional and would like to use the GIStorical data for a project, you can do a data request via the webviewer. Fill out the form and we will review your request. If we can honor your request we ask you to sign a data transfer agreement and in publications always refer correctly to our project.


Of course, we welcome your feedback, positive or negative. Please fill out the feedback form. We do regularly updates in our webviewer, both in content and in functionality.