After adding a layer in DataViz WebAPP, you can set the layer's name, opacity, visible range, style, attribute, display/hide, auto refresh, pop-up window, etc. according to your needs. You can update the added data or services in the DataViz WebApp synchronously when the source data or services change. You can also manage layers in groups.
Layer settings
Click the "Layer" tab to list all the layers of the current map. You can set the name, opacity, visible range, style, attributes, visibility, and attribute pop-ups of the layers.
- Change the layer order: Drag the arrangement order of the layers in the layer list to change the overlay order of the layers in the map
- Layer visibility: Click the
icon, to control the visibility of the layer in the map
- Delete: Delete current layer
- Zoom to: Except for the marker layer, all other layers support zooming to the range of the current layer
- Export: Supports quick export of feature layers added by uploaded files, added iServer REST data service, and marker layers as files. For details, please refer to: Output
- Attribute table: When the source of the layer is the uploaded data file and web data service, you can view the attribute table information of the layer. For details, please refer to Attribute query and editing.
- Legend: When the layer source is the uploaded data file and web data service, it also supports displaying the legend of the current layer in the map
Click the
behind the layer name, you can set the following:
- Rename: Rename the selected layer
- Opacity: Adjust the opacity of the layer
- visible range: Set the visible scale range of the layer
- Style: Change the style of the marker layer, please refer to: Modify layer style
- Auto update: Set the automatic refresh mode to turn on or off, and set the automatic refresh time interval. After opening, the layer will automatically obtain the latest data according to the specified refresh time interval. The marker layer does not support this configuration.
- Update: Update the added data or service, please refer to: Update data and services
- Property: Set the display name of the attribute field. Set the display name of the attribute field. After setting, the interface will be displayed with the display name. For layers whose sources are uploaded data files and web data services, this configuration is supported
- Pop-up configuration: For layers whose sources are uploaded data files and web data services, support for customizing the attribute pop-up window of the feature. For details, please refer to: Popup config
Update data and services
When the source data or service of the layer changes, these data or services can be updated through the update function without re-accessing and modifying the style. For example, you can update the daily Coronavirus cases data to the map through the layer update function. The specific operations are as follows:
- Click theon the right side of the layer name and select "Update" from the drop-down menu
- Check the prompt message and click "Continue"
- For the data uploaded through the file, select the updated data file locally, click "Open", and wait for the data update to complete
- Data from the Web, select the service type, and add the updated service address to complete the service update
Popup config
Click the feature in the map to view the attribute information in the pop-up window. You can use the pop-up window configuration function to add information such as pictures and text descriptions to the pop-up window to help you explain the feature more abundantly. Basic style maps, Unique values maps, Range thematic maps, Rank symbols thematic maps, and dataflow layers all support the configuration of attribute pop-up windows.
The specific operations are as follows:
- Click on the right side of the layer name, and select "Popup config" from the drop-down menu
- In the pop-up configuration window, field information is included by default. Click "Add" to add text, media, and field list, and drag to modify the order in which all kinds of information are displayed in the pop-up window.
- Field: All attribute information of the feature is displayed by default. You can set the visibility of the attribute field in the pop-up window through the check box, and drag the field to adjust the display order of the field.
- Text: Enter the text content that will be added to the pop-up window in the text box. By entering "{}" or clicking
, the fields in the data can be added to the text. When adding a hyperlink to a text, you need to select the text first, then click 
to enter the static link address, or click to select the link field from the data. After selection, the link will jump to the corresponding page according to the field value.
- Media: Including videos and pictures.
- Click "Add media", select a video or picture, specify the picture or video name in the pop-up box, you can manually enter the name, or click to select the data field value as the picture name, or use a combination of both
- Enter the URL of the picture or video, enter the static address, or click，to select the field of the picture URL from the data, or use a combination of the two
- Click "OK" to apply the configuration
- To remove pictures or videos, click
in the media list. You can adjust the order of the pictures or videos displayed by dragging the list. Click 
to modify the configuration information.
layer grouping
DataViz WebAPP supports layer grouping to improve management efficiency. The specific operations are as follows:
- Click the "Add Group" button to create a new group, you can modify the group name and delete the group.
- Drag the relevant layer to the corresponding group to complete the grouping.
- Clicking
or 
to switch the visibility of the layer group on the map.