Heatmaps of categories

[palhaland]

Hi 👋 First of all, thank you for the great work on Wanderer! I’d like to propose a feature that could enhance the user experience and provide more insight into usage patterns.

🗺️ Feature Proposal: Heatmap Overlay (also proposed in issue #111)
Summary:
Introduce a heatmap overlay that can be toggled on the map to visualize popular tracks/routes. This could be implemented in two layers:

Category-Based Heatmap:

Shows aggregated activity or density for different categories (e.g., Hiking, Walking, Biking).
Helps users discover popular areas for specific interests.

User-Specific Heatmap:

Displays a personalized heatmap based on the current user's activity.
Could use a different color scheme to distinguish from the general category heatmap.

Benefits:

Enhances exploration by highlighting hotspots.
Provides visual feedback on user engagement.
Encourages discovery of new areas based on community trends or personal history.

Optional Enhancements:

Toggle between heatmap types (global vs. personal).
Adjustable intensity or time filters (e.g., last 30 days).
Legend or tooltip to explain heatmap intensity.

Technical Considerations:

Could leverage existing mapping libraries (e.g., Leaflet, Mapbox) with heatmap plugins.
Data aggregation might be needed on the backend for performance.

Let me know if this aligns with the project vision — happy to help brainstorm or contribute if needed!