ggmapcn-package: ggmapcn: China-Focused Mapping Tools with Optional Global...
In ggmapcn: Customizable China and Global Map Visualizations
ggmapcn-package R Documentation
ggmapcn: China-Focused Mapping Tools with Optional Global Support for ggplot2
Description
**ggmapcn** provides lightweight, ready-to-use tools for drawing China and
world maps with *ggplot2*. It bundles clean geodata and offers simple,
projection-aware helpers for basemaps, graticules, compasses, and scale bars.
Details
## Main Features
- **World maps**: 'geom_world()' draws a complete global basemap with
countries, coastlines, boundaries, and optional ocean fill.
- **China maps**: 'geom_mapcn()' and 'geom_boundary_cn()' provide provincial,
prefecture-level maps and coastlines.
- **Annotation tools**:
- 'annotation_graticule()' — global graticules with projection-aware labels.
- 'annotation_scalebar()' — scale bar with automatic units and CRS
detection.
- 'annotation_compass()' — north arrow with several styles.
- **Projection helper**:
- 'coord_proj()' — specify geographic 'xlim'/'ylim' in degrees and
automatically transform to any projection.
- **Geodata management**:
- 'check_geodata()' locates bundled world and China datasets and ensures
graceful behaviour when data or internet resources are unavailable.
## Integration
All functions return standard *ggplot2* layers and work seamlessly with
'sf' objects, custom projections, and 'coord_sf()'.
Author(s)
Maintainer: Liang Ren rl23@mails.tsinghua.edu.cn (ORCID)
See Also
Useful links:
ggmapcn documentation built on Nov. 23, 2025, 9:06 a.m.
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| ggmapcn-package | R Documentation |
ggmapcn: China-Focused Mapping Tools with Optional Global Support for ggplot2
Description
**ggmapcn** provides lightweight, ready-to-use tools for drawing China and world maps with *ggplot2*. It bundles clean geodata and offers simple, projection-aware helpers for basemaps, graticules, compasses, and scale bars.
Details
## Main Features
- **World maps**: 'geom_world()' draws a complete global basemap with countries, coastlines, boundaries, and optional ocean fill.
- **China maps**: 'geom_mapcn()' and 'geom_boundary_cn()' provide provincial, prefecture-level maps and coastlines.
- **Annotation tools**: - 'annotation_graticule()' — global graticules with projection-aware labels. - 'annotation_scalebar()' — scale bar with automatic units and CRS detection. - 'annotation_compass()' — north arrow with several styles.
- **Projection helper**: - 'coord_proj()' — specify geographic 'xlim'/'ylim' in degrees and automatically transform to any projection.
- **Geodata management**: - 'check_geodata()' locates bundled world and China datasets and ensures graceful behaviour when data or internet resources are unavailable.
## Integration
All functions return standard *ggplot2* layers and work seamlessly with 'sf' objects, custom projections, and 'coord_sf()'.
Author(s)
Maintainer: Liang Ren rl23@mails.tsinghua.edu.cn (ORCID)
See Also
Useful links:
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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