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Fix the resolution guide with explanation #203

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Fix the resolution guide with explanation #203

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13 changes: 8 additions & 5 deletions README.md
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Expand Up @@ -106,16 +106,19 @@ python create_map_poster.py -c "Dubai" -C "UAE" -dc "دبي" -dC "الإمارا
**Note**: Fonts are automatically downloaded from Google Fonts and cached locally in `fonts/cache/`.

### Resolution Guide (300 DPI)
When generating a map, the tool adds an extra 0.1 inches to your specified width and height.

Use these values for `-W` and `-H` to target specific resolutions:

| Target | Resolution (px) | Inches (-W / -H) |
|--------|-----------------|------------------|
| **Instagram Post** | 1080 x 1080 | 3.6 x 3.6 |
| **Mobile Wallpaper** | 1080 x 1920 | 3.6 x 6.4 |
| **HD Wallpaper** | 1920 x 1080 | 6.4 x 3.6 |
| **4K Wallpaper** | 3840 x 2160 | 12.8 x 7.2 |
| **A4 Print** | 2480 x 3508 | 8.3 x 11.7 |
| **Instagram Post** | 1080 x 1080 | 3.5 x 3.5 |
| **Mobile Wallpaper** | 1080 x 1920 | 3.5 x 6.3 |
| **HD Wallpaper** | 1920 x 1080 | 6.3 x 3.5 |
| **4K Wallpaper** | 3840 x 2160 | 12.7 x 7.1 |
| **A4 Print** | 2480 x 3508 | 8.2 x 11.6 |

You can use this formula to hit the desired resolution: Input Value (`-W` or `-H`) = (Target pixels / DPI) - 0.1

### Usage Examples

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