| Family | Bits | Mnemonic | Notes | ||
|---|---|---|---|---|---|
| Unsigned Integer | 1 | 1-BIT |
| ||
| 2 | 2-BIT |
| |||
| 4 | 4-BIT |
| |||
| 8 | UINT8 |
| |||
| 16 | UINT16 |
| |||
| 32 | UINT32 |
| |||
| Signed Integer | 8 | INT8 |
| ||
| 16 | INT16 |
| |||
| 32 | INT32 |
| |||
| Floating Point | 32 | FLOAT |
| ||
| 64 | DOUBLE |
|
| Mnemonic | Bands | Sample type | Notes |
|---|---|---|---|
| MONOCHROME | 1 | 1-BIT | the implicit photometric interpretation always is:
|
| PALETTE | 1 | 1-BIT 2-BIT 4-BIT UINT8 |
the implicit photometric interpretation is always the one defined by the Palette Color associated to the Raster Coverage. This actually corresponds to an RGB output image, the color of each pixel being indirectly determined by its palette index. |
| GRAYSCALE | 1 | 2-BIT 4-BIT UINT8 |
the implicit photometric interpretation is always of the Grayscale type. 0 always corresponds to full black, and the max value to full white. |
| RGB | 3 | UINT8 UINT16 |
the implicit photometric interpretation is always of the RGB type. |
| MULTIBAND | > 1 < 256 |
UINT8 UINT16 |
there is no implicit photometric interpretation. |
| DATAGRID | 1 | INT8 UINT8 INT16 UINT16 INT32 UINT32 FLOAT DOUBLE |
there is no implicit photometric interpretation. |
| Mnemonic | Compression type | Notes |
|---|---|---|
| DEFLATE | lossless | a general purpose compression algorithm used by ZIP archives and implemented by zlib. You can find more detailed information about this algorithm here. |
| LZMA | lossless | an advanced general purpose compression algorithm used by 7-ZIP archives and implemented by liblzma. You can find more detailed information about this algorithm here. Please note: this algorithm is very slow while compressing, but is reasonably fast while decompressing; and usually ensurees better compression ratios than DEFLATE. |
| FAX4 | lossless | an highly specialized compression algorithm only supporting monochrome images initially developed for fax machines: implemented by libtiff. You can find more detailed information about this algorithm here. |
| JPEG | lossy | an universally spread photographic image format supporting RGB and Grayscale colorspaces but completely lacking of any transparency support. Implemented by the someway obsolete libjpeg. You can find more detailed information about this algorithm here. |