CAT: COG Converter

## ⚡ Convert GeoTIFF to Cloud Optimized GeoTIFF

Choose your data type below for optimized conversion settings.

Select Orthomosaic File RGB Optimized

Multi-band RGB orthomosaic imagery

Resampling Method

Bilinear or cubic work best for aerial imagery

Compression

JPEG provides excellent compression for RGB photos

Output Filename (optional)

Leave blank to auto-generate filename

💡 DEM Conversion Tips:

- Use LZW compression (lossless) to preserve elevation accuracy
- Enable auto-detect NoData to avoid conversion errors
- For bathymetric DEMs (underwater), nodata is often -32767
- Bilinear resampling creates smooth elevation surfaces

Select DEM File Elevation Optimized

Single-band elevation data (DEM/DSM/DTM/Bathymetry)

Resampling Method

Bilinear smooths elevation nicely for visualization

Compression

Always use lossless compression to preserve elevation accuracy

NoData Value *Important!

⚠️ Must match your source file's nodata value! Check with: `gdalinfo yourfile.tif`
Common values: -9999, -32767, -32768, 0. For bathymetric DEMs, often -32767.

Auto-detect NoData from source file (recommended)

✅ Let the converter read the nodata value from your source file automatically

Output Filename (optional)

Leave blank to auto-generate filename

#### File Information

## 📦 Batch Conversion

For converting multiple files, use the command-line batch converter:

    python make_cog_batch.py --src-dir "input" --dst-dir "data"