Zusammenfassung
Calculates the Normalized Difference Snow Index (NDSI) from a multiband raster object and returns a raster object with the index values.
Diskussion
The Normalized Difference Snow Index (NDSI) is designed to use MODIS (band 4 and band 6) and Landsat TM (band 2 and band 5) for identification of snow cover while ignoring cloud cover. Since it is ratio based, it also mitigates atmospheric effects.
NDSI = (Green - SWIR) / (Green + SWIR)For information about other multiband raster indexes, see the Band Arithmetic raster function.
The referenced raster dataset for the raster object is temporary. To make it permanent, you can call the raster object's save method.
Syntax
NDSI (raster, {green_band_id}, {swir_band_id})| Parameter | Erläuterung | Datentyp |
raster | The input raster. | Raster |
green_band_id | The band ID of the green band. The ID index uses one-based indexing. (Der Standardwert ist 4) | Integer |
swir_band_id | The band ID of the shortwave infrared band. The ID index uses one-based indexing. (Der Standardwert ist 6) | Integer |
| Datentyp | Erläuterung |
| Raster | The output raster object with the NDSI values. |