# Scan with CHCNAV

A [CHCNAV](https://www.chcnav.com/) input contains panoramas, one text pose table, and an optional LAS point cloud. Portal matches image filenames against pose records before mapping.

> CHCNAV data requires neither 01Spatial Reference Boards nor Map Configurator; upload it and start the build.

Prepare JPG/JPEG/PNG/TIF/TIFF panoramas and a `.txt` file whose first fields are:

```text
imageName X Y Z Omega Phi Kappa
```

Commas, tabs, or whitespace are accepted. Every `imageName` must match its uploaded filename exactly. An optional `.las` adds point-cloud data.

Create a **CHCNAV** map, select the panorama directory, pose file, and optional point cloud, then review the reported match count before Build. Fix filename or pose-table mismatches instead of accepting a partial result unless the omitted images are intentionally outside scope. When Ready, check camera order, coordinate direction, connections, and LAS-to-Points alignment before localization tests.