1. Introduction | 2. Basic usage | 2.1 Default WGS84 map | 2.2 Explicit CRS specification | 2.3 Hiding the ocean layer | 2.4 Hiding administrative boundaries | 3. Projections | 3.1 Robinson projection | 3.2 Robinson projection centred at 150°E | 3.3 Geographic CRS with shifted central meridian | 4. Axis labels and gridlines | 5. Graticule annotation (meridians & parallels) | 5.1 Global WGS84 map with graticules | 5.2 Robinson projection | 5.3 Regional China map (clean axis labels) | 6. Highlighting selected countries | 6.1 Highlighting China | 6.2 Highlighting multiple countries | 7. Visualizing Custom Data | 7.1 Merging external metrics

1. Setup | 2. Scale bars in a projected CRS | 3. Scale bar styles | 4. Geographic CRS: Approx distance vs. Degrees | 5. Basic compass (Grid North) | 6. True North vs. Grid North | 7. Compass styles | 8. Combining scale bar and compass

Introduction | Example 1: Basic Map of China | Example 2: Adding Buffer Zones and Coastlines | Example 3: Adding Spatial Point Data | Example 4: basemap_vege: Vegetation Map of China Layer for ggplot2 | Example 5: basemap_dem: Elevation Map of China Layer for ggplot2 | Example 6: coord_proj: Transforming Limits for Custom Projections