The map keeps zooming in.

[Aeshan-Rosa]

Cesium Auto-Zoom Bug Report

Summary

The Cesium map continuously zooms in without user intent. After loading the app, the camera altitude keeps decreasing and the view eventually becomes unusable (black/sky view or extreme close-up). This prevents normal pan and inspect interactions and makes layer/entity workflows difficult to use.

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Environment

Application

• WorldView-Lite frontend

Stack

• React
• Vite
• TypeScript
• CesiumJS

Frontend URL

http://localhost:5173

Backend

http://localhost:8000

Platform

• macOS
• Trackpad / mouse input

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Steps to Reproduce

1. Start the backend server.
2. Start the frontend application.
3. Open the application in the browser:

http://localhost:5173

4. Wait a few seconds after the map loads.

5. Optionally interact with the map:

   • Scroll
   • Double click
   • Trackpad gestures
   • Select a track/entity

6. Observe the camera zoom behavior.

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Expected Result

• The map remains stable when the user is idle.

• Zoom only occurs when the user explicitly performs a zoom action.

• Camera altitude stays within reasonable limits.

• The map remains usable for:

  • Panning
  • Inspecting objects
  • Viewing tracks
  • Managing layers

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Actual Result

• The map repeatedly zooms in automatically.

• Camera altitude continuously decreases.

• Eventually results in:

  • Black / sky view
  • Extreme close-up view

• User must frequently reset the camera manually.

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Impact

This issue blocks core user experience features:

• Object inspection
• Layer toggling
• Track viewing
• General map navigation

It causes confusion for users and makes the interface difficult to operate.

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Suspected Causes

Possible sources of the issue include:

1. Cesium Default Zoom Gesture Handling

• Mouse wheel zoom
• Trackpad pinch gestures
• Double-click zoom

2. Programmatic Camera Updates

Camera functions may be triggered during updates:

• camera.flyTo()
• viewer.zoomTo()
• viewer.camera.setView()

This might occur during:

• Track updates
• Entity updates
• Data refresh cycles

3. Camera Feedback Loops

A listener or clamp system may be forcing camera updates repeatedly:

Examples:

• Camera position listener
• Altitude clamp logic
• Entity tracking callbacks

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Acceptance Criteria

The issue will be considered resolved when:

• The map does not zoom automatically when the user is idle.
• Zoom occurs only through explicit user input or controlled UI actions.
• Camera altitude remains within configured minimum and maximum limits.
• Track queries and live updates do not trigger camera zoom behavior.
• The reproduction steps described above no longer produce the issue.

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Notes

This bug significantly affects usability of the Cesium map interface and should be prioritized for stabilization of the camera control system.