Use Case: Layer Visibility

Summary

  • Scope: All Layers
  • Level: User Goal
  • Actors: App User
  • Brief: User changes the visibility of layers in their map
  • Assignee: Samuel

Scenarios

  • Precondition: User has opened the app and has multiple layers available to view.

  • Main success scenario: User successfully changes the visibility of layers:

    • visibility on/off (elements and colors on layer are fully visible or invisible)
    • opacity in % (elements and colors on layer have a chosen opacity)

  • Error scenario: The user attempts to toggle the visibility but the app is experiencing technical difficulties and is unable to complete the request, displaying an error message.

  • Postcondition: The user has changed the visibility of the selected layer.

  • Non-functional Constraints:

  • improvements

  • Alternative scenario:

    • On activation of a layer, also the visibility gets turned on.
    • On activation of some layers, the visibility of others layer changes; e.g., activation of the hydrology layer also sets the visibility of the infrastructure layer to on.

Notes

The layer opacity is a Konva feature and is implemented in Map.tsx. The control elements for the opacity and visibility can be found in LayerListItem.tsx