Radiometric Indices

Calculate spectral indices from multispectral imagery. Supports vegetation indices (NDVI, SAVI, etc.), water indices (NDWI, MNDWI), soil indices, and built-up indices.

ID	imagery_radiometric_indices
Domain	geo
Category	imagery
Type	raster-to-raster
Version	1.0.0

view yaml ◦view github ◦

Parameters

indices: array · default Vegetation:NDVI · List of indices to compute. Format: Category:IndexName Vegetation indices: - Vegetation:NDVI - Normalized Difference Vegetation Index - Vegetation:RVI - Ratio Vegetation Index - Vegetation:SAVI - Soil Adjusted Vegetation Index - Vegetation:MSAVI - Modified SAVI - Vegetation:GEMI - Global Environment Monitoring Index - Vegetation:ARVI - Atmospherically Resistant VI Water indices: - Water:NDWI - Normalized Difference Water Index - Water:NDWI2 - NDWI variant (Gao) - Water:MNDWI - Modified NDWI Water-quality indices: - WaterQuality:NDCI - Normalized Difference Chlorophyll Index (Mishra & Mishra 2012, doi:10.1080/2150704X.2011.641164). Formula: (RedEdge - Red)/(RedEdge + Red). For Sentinel-2 use B5 (red-edge) and B4 (red); for Sentinel-3 OLCI use Oa10 and Oa08. Proxy for chlorophyll-a concentration in turbid productive inland waters; requires a red-edge band so not available on Landsat OLI. - WaterQuality:NDTI - Normalized Difference Turbidity Index (Lacaux et al. 2007, doi:10.1016/j.rse.2006.07.012). Formula: (Red - Green)/(Red + Green). For Sentinel-2 use B4 (red) and B3 (green); equivalent bands on Landsat, MODIS, Planet. Relative turbidity / suspended-sediment proxy. Soil indices: - Soil:RI - Redness Index - Soil:CI - Color Index - Soil:BI - Brightness Index Burn / fire indices: - Fire:NBR - Normalized Burn Ratio (Key & Benson 2006, doi:10.3133/ofr0211). Formula: (NIR - SWIR2)/(NIR + SWIR2). For Sentinel-2 use B8 (NIR) and B12 (SWIR2); for Landsat 8/9 OLI use B5 and B7. Used to map burn severity (dNBR = NBR_pre - NBR_post).
channels_red: integer · Red band number (1-based). Required for most vegetation indices.
channels_green: integer · Green band number (1-based). Required for some water indices.
channels_blue: integer · Blue band number (1-based). Required for some soil indices.
channels_red_edge: integer · Red-edge band number (1-based). Required for WaterQuality:NDCI (Sentinel-2 B5, Sentinel-3 OLCI Oa10). Not available on Landsat OLI.
channels_nir: integer · NIR band number (1-based). Required for NDVI and most vegetation indices.
channels_mir: integer · MIR/SWIR band number (1-based). Required for some water indices.
channels_swir2: integer · SWIR2 band number (1-based). Required for Fire:NBR (Sentinel-2 B12, Landsat 8/9 OLI B7).