The background selector, located in the bottom left corner of the Viewer, allows the user to add, manage and remove map backgrounds.
By clicking on the background selector several miniatures will be displayed. Those miniatures can be selected in order to switch from a background to another (the map backgrounds set by default in MapStore are Open Street Map, NASAGIBS, OpenTopoMap, Sentinel 2 and the Empty Background).
For example choosing OpenTopoMap, the map background will change like in the following image:
If the user has editing permissions on the map (independently on the role, see Resource Properties section for more information about permissions), it is also possible to add, edit or remove backgrounds.
A new background can be added through the button on the top of the background selector main card. Performing this operation the Catalog panel opens with the possibility to access the Remote Services:
Default Backgrounds service is available only accessing the Catalog from the background selector, but if you add a new Remote Service from there, it will be available also accessing Catalog from Buger Menu or from TOC. Default Backgrounds represent a list of backgrounds that can be configured from MapStore's configuration files (more information about that can be found in Developer Guide's Map Configuration section).
From the Catalog the user can choose the layers to add to the list of backgrounds:
As soon as a layer is selected, the Add New Background window opens:
In particular, from this window, the user can perform the following operations:
Add a Thumbnail choosing the desired local file by clicking on image preview area, or simply with the drag and drop function
Set the Title
Set the Format (between
Choose the Style, between the ones available for that layer
Add Additional Parameters of three different types: String, Number or Boolean (these parameters will be added to the WMS request).
The thumbnail image size should be a square of 98x98px or 128x128px, max 500kb and the supported format are
Once the options are chosen, with the button the new background layer is definitively added to the background selector as a card and automatically set as the current one.
It is possible to edit backgrounds by clicking on settings icon on top of each background card:
Default Backgrounds layers can't be edited, with an exception for Sentinel 2: only WMS Layers can be edited&/configured through the Background Selector.
The Edit Current Background window opens, allowing the user to customize the same set of information when adding a new background (see previous section).
It is possible to remove a background from the background selector by clicking on remove icon on top-right of each card
By default, for new maps, all backgrounds from Default Backgrounds Service are added to the background selector, and in Catalog they appear grayed (it's not allowed to add the same default background twice): as soon as you remove one from the background selector, it becomes selectable from the Catalog.