The Properties tab in the GeoExpress interface provides information about the input images used in a project. Information about any TIFF compression technique used in the input images is also provided, even if the technique is not supported by GeoExpress.
The following table lists TIFF compression types displayed by GeoExpress and whether the compression type is supported by GeoExpress.
| Compression | Supported? |
|---|---|
| CCITT Group 3 fax | No |
| CCITT Group 4 fax | No1 |
| Limpel-Ziv-Welsh (LZW) | Yes |
| Old JPEG | No |
| Standard JPEG, including 12-bit | Yes |
| NeXT run-length | No |
| CCITT run-length encoding | Yes2 |
| Pixar image format | No |
| Desktop color separation | No |
| Standard JBIG | No |
| Pack-bits encoding | Yes |
| ThunderScan | No |
| Deflate method (PNG) | No |
1GeoExpress is able to process single-page Group 4 TIFF files, but encoding this format is not recommended.
2There are many different types of run-length encoding. Some methods are supported; others are not. GeoExpress works best with uncompressed images.