Add Geographic Visualization for Solar Forecasts

[Sharkyii]

Pull Request

Description

Adds geographic visualization functionality to the evaluation pipeline. Generates elevation maps, PV forecast heatmaps, and overlay visualizations from evaluation results.

Key features:

• Automatically downloads DEM data from NOAA if not present
• Calculates geographic bounds from PV site locations
• Uses inverse distance weighting for smooth heatmap interpolation
• Creates three outputs: elevation map, PV heatmap, and combined overlay

Files changed:

• Added quartz_solar_forecast/eval/visualize.py - Visualization functions
• Modified quartz_solar_forecast/evaluation.py - Integrated into evaluation pipeline

How Has This Been Tested?

Tested with UK region PV sites:

• Verified DEM file download and extraction
• Confirmed elevation map generation with proper coastlines
• Validated PV heatmap interpolation with site markers correctly positioned
• Tested overlay blending functionality
• Checked auto-calculated geographic bounds work correctly

Visual verification:

• Yes - Generated maps show proper geographic alignment, smooth interpolation, and accurate site positioning

Checklist:

• My code follows OCF's coding style guidelines
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings

[Sharkyii]

Fixes : #91

[Sharkyii]

@peterdudfield could you please review it?