Map Selector

Synoptic Panel accepts a DAX measure in the Map Selector field well.

This measure should return a string consisting in the concatenation of reference values that will be associated to the maps you want to display. Internally, this string is split into individual references, using a separator character as defined in the visual settings.

For each map imported into Synoptic Panel, you can assign one of the references from the map selector using the Map Editor, or directly in the JSON file when importing multiple remote maps.

When the map selector measure returns a reference that matches one of the references assigned to the maps, the visual will display the corresponding map. If the measure returns a reference that doesn’t match any of the maps, the visual will display a warning message.

In case of multiple matching maps, the visual will also display the dropdown list to let the user switch between them.

Selector Measure

The map selector measure must be a DAX expression that returns a string. This string should contain the reference values that will be associated to the maps you want to display.

Assuming you have a table with the following columns and values:

OfficesTable
Office	...	...
Miami	...	...
New York	...	...
Seattle	...	...

The map selector measure could be defined as follows:

SelectedOffices = 
    CONCATENATEX(
        ALLSELECTED('OfficesTable'[Office]),
        'OfficesTable'[Office],
        "✄" // Separator character
    )

In this example, the measure returns a string with the names of the offices currently selected, separated by the character ✄. Depending on your needs, you can replace the ALLSELECTED function with others, such as VALUES, to adjust how the map selector measure interacts with the context.

Remember to modify the table and column names according to your dataset.

IMPORTANT: The separator character must be the same as the one defined in the visual setting Map Selector Separator.

Add Default View

Synoptic Panel can show a default map when no specific item is selected. You can set this up by building a DAX measure that provides a “surrogate” value to the Map Selector field.

Create a measure with this pattern:

SelectedOffices =
    VAR vSelector =
        CONCATENATEX(
            ALLSELECTED('OfficesTable'[Office]),
            'OfficesTable'[Office],
            "✄" // Separator character
        )
    VAR vDefaultView = "Default view"
    Return
    IF( COUNTROWS(ALLSELECTED('OfficesTable'[Office])) = 1, vSelector, vDefaultView)

This measure ignores filters coming from Synoptic Panel itself. It uses ALLSELECTED to accomplish this. ALLSELECTED considers only the filter context outside the visual, such as from a slicer.

The measure checks the current external filter selection:

• One item selected: If COUNTROWS(ALLSELECTED('OfficesTable'[Office])) equals 1, the user has filtered for a single office. The measure returns that office’s name.
• Zero or many items selected: If the count is greater than 1, the measure returns the hardcoded text “Default view”.

Synoptic Panel receives the result of this measure in its Map Selector data field. The text “Default view” is treated just like any other value from your column.

The Map Selector setting will only display one reference value at a time.

• When no selection is active (or multiple are active), the measure feeds “Default view” to the visual.
• When a single selection is active, the measure feeds that specific value (e.g., “Main Office”) to the visual.

This logic ensures Synoptic Panel always has a single, valid map name to display.

Please note that only one reference value will be displayed in the map selector section at a time.

Assigning References to Maps

To assign a reference to a map, follow these steps:

1. Create the map selector measure as described above.

2. Bind the measure to the Map Selector field well.

   

3. Load a map into Synoptic Panel, if you haven’t already.

4. Open the Map Editor by clicking the pencil button in the visual toolbar (proceed to the next step if you have just uploaded a map).

5. Select a map and click the Edit button.

6. In the Map Editor, choose the reference value that will be associated with the map from the dropdown list in the Map Selector section.

7. Click Save to apply the changes.

Repeat these steps for each map you want to associate with a reference.

After assigning the references, the visual will display the corresponding map when the map selector measure returns a matching reference.