Zusammenfassung
Calculates the Transformed Soil Adjusted Vegetation Index (TSAVI) from a multiband raster object and returns a raster object with the index values.
Auswertung
Der Transformed Soil Adjusted Vegetation Index (TSAVI) ist ein Vegetationsindex, der versucht, Bodenhelligkeitseinflüsse zu minimieren, indem angenommen wird, dass die Bodenlinie eine beliebige Neigung und einen beliebigen Schnittpunkt hat.
TSAVI = (s *(NIR - s * Red - a)) / (a * NIR + Red - a * s + X * (1 + s2))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
TSAVI (raster, {nir_band_id}, {red_band_id}, {s}, {a}, {X})| Parameter | Erklärung | Datentyp |
raster | The input raster. | Raster |
nir_band_id | The band ID of the near-infrared band. The ID index uses one-based indexing. (Der Standardwert ist 4) | Integer |
red_band_id | The band ID of the red-edge band. The ID index uses one-based indexing. (Der Standardwert ist 3) | Integer |
s | The slope of the soil line. (Der Standardwert ist 0.33) | Double |
a | The soil line intercept. (Der Standardwert ist 0.5) | Double |
X | The adjustment factor that is set to minimize soil noise. (Der Standardwert ist 1.5) | Double |
| Datentyp | Erklärung |
| Raster | The output raster with the TSAVI values. |
Codebeispiel
Calculates the Transformed Soil Adjusted Vegetation Index for a Landsat 8 image.
import arcpy
TSAVI_raster = arcpy.sa.TSAVI("Landsat8.tif",5,4,0.33,0.5,1.5)