Convert TIFF to KMZ

Understanding TIFF and KMZ file formats

TIFF (Tagged Image File Format) is a widely used raster image format, popular for storing high-quality graphics, satellite imagery, and scanned documents. It supports lossless compression and is commonly used in geospatial applications for storing map data.

KMZ is a compressed version of the KML (Keyhole Markup Language) file format, used primarily by Google Earth and other GIS applications to display geographic data, including images, overlays, and placemarks. KMZ files can package images, KML files, and other resources into a single, portable archive.

Why convert TIFF to KMZ?

Converting a TIFF image to KMZ allows you to overlay georeferenced raster images onto 3D maps in Google Earth or similar GIS platforms. This is especially useful for visualizing satellite imagery, scanned maps, or aerial photographs in a geographic context.

How to convert TIFF to KMZ

To convert a TIFF file to a KMZ, the TIFF image must be georeferenced (contain spatial reference information). The process involves creating a KML overlay that references the TIFF image and then packaging both into a KMZ file.

Best software for TIFF to KMZ conversion

• QGIS (Free and open-source):
  1. Open QGIS and load your georeferenced TIFF file (Layer → Add Layer → Add Raster Layer).
  2. Right-click the layer and select Export → Save As....
  3. Choose KML as the format and check the option to create a KMZ file.
  4. Set the desired output location and click OK.
• Global Mapper (Commercial):
  1. Open your TIFF file in Global Mapper.
  2. Go to File → Export → Export Raster/Image Format.
  3. Select Google Earth KMZ as the output format.
  4. Configure export settings and save the file.
• GDAL (Command-line tool):
  1. Use the gdal_translate and gdal2tiles.py utilities to convert TIFF to KML SuperOverlay, then package as KMZ.

Tips for successful conversion

• Ensure your TIFF is georeferenced (has a .tfw or embedded spatial reference).
• Check the image size; very large TIFFs may need to be tiled or downsampled for Google Earth.
• Preview the KMZ in Google Earth to verify correct placement and appearance.

Summary

Converting TIFF to KMZ enables you to visualize raster images as overlays in Google Earth and other GIS tools. QGIS is the best free software for this conversion, while Global Mapper offers advanced commercial options. Always ensure your TIFF is georeferenced for accurate results.