# Visual proof

The visual proof is a compact gallery from the package QA run. It shows that the site examples are built from real reduced bathymetry, that hillshade-supported maps render with vector overlays, and that profile and modeling outputs use the intended raster value columns.

The full QA report is kept in `qa/visual-proof/visual-proof.md` in the source repository. The CRAN source package excludes the QA directory, so only selected small figures are copied into package figure assets for documentation.

## Terrain Metrics

Slope over hillshaded Hole-in-the-Wall bathymetry. The figure demonstrates that metric maps can use bathymetry-derived hillshade and contours as visual context while preserving the metric as the mapped value.

## Transects

Transects are oriented from local surface aspect and plotted over the prepared bathymetry. The line angle is recorded in the transect attributes so the choice is inspectable.

## Cross-Sections

Cross-section profiles use `bathy_m` explicitly on the y-axis. Numeric metadata such as transect width, height, offset, and angle are ignored during automatic value-column inference.

## Isobath Corridors

Isobath corridors are shown with the source isobaths in black. The black lines mark the depth horizons that were buffered to create extraction corridors.

## PCA

PCA scores retain site metadata and the axis labels report dominant loading directions. This makes exploratory terrain separation easier to inspect before formal modeling.

## Local QA Summary

The local validation pass for this site recorded:

- pkgdown build: completed locally
- R CMD check: 0 errors, 0 warnings
- source package size: below 9 MB
- expected website URL: https://el-cordero.github.io/blueterra/
- deployment workflow: `.github/workflows/pkgdown.yaml`

GitHub Actions results are available from the repository Actions tab: https://github.com/el-cordero/blueterra/actions.