Automated Cloud-Cover Assessment (ACCA) for Landsat TM/ETM+ imagery as proposed by Irish (2000). This tool incorporates E.J. Tizado's GRASS GIS implementation (i.landsat.acca).
| Name | Type | Identifier | Description | Constraints |
Input | Green | Grid (input) | BAND2 | Landsat band 2 reflectance | - |
Red | Grid (input) | BAND3 | Landsat band 3 reflectance | - |
NIR | Grid (input) | BAND4 | Landsat band 4 reflectance | - |
SWIR | Grid (input) | BAND5 | Landsat band 5 reflectance | - |
Thermal | Grid (input) | BAND6 | Landsat band 6 temperature [Kelvin] | - |
Output | Cloud Cover | Grid (output) | CLOUD | - | - |
Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
Grid system | Grid system | BAND6_GRIDSYSTEM | - | - |
Apply post-processing filter to remove small holes | Boolean | FILTER | - | Default: 1 |
B56 Composite (step 6) | Floating point | B56C | - | Default: 225.000000 |
B45 Ratio: Desert detection (step 10) | Floating point | B45R | - | Default: 1.000000 |
Always use cloud signature (step 14) | Boolean | CSIG | - | Default: 1 |
Bypass second-pass processing, and merge warm (not ambiguous) and cold clouds | Boolean | PASS2 | - | Default: 1 |
Include a category for cloud shadows | Boolean | SHADOW | - | Default: 1 |