NAME
i.spec.sam - Performs Spectral angle mapping on satellite/aerial images
KEYWORDS
imagery,
spectral angle mapping,
parallel
SYNOPSIS
i.spec.sam
i.spec.sam --help
i.spec.sam group=name input=name result=string [--help] [--verbose] [--quiet] [--ui]
Flags:
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- group=name [required]
- Name of input imagery group
- input=name [required]
- Matrix file containing spectral signatures
- result=string [required]
- Raster map prefix to hold spectral angles
i.spec.sam is used to perform Spectral Angle Mapping.
Input matrix of signatures
# Channels: r g b i1 i2 i3
# Enter spectra linewise!
# 1. Sagebrush
# 2. Saltbush
# 3. Soil
# 4. Dry grass
#
Matrix: 4 by 6
row0: 8.87 13.14 11.71 35.85 28.26 10.54
row1: 13.59 20.12 19.61 70.66 34.82 16.35
row2: 28.26 34.82 38.27 40.1 38.27 23.7
row3: 10.54 16.35 23.7 38.98 40.1 38.98
- Neteler, M., 1999: Spectral Mixture Analysis von Satellitendaten zur
Bestimmung von Bodenbedeckungsgraden im Hinblick auf die
Erosionsmodellierung. M.Sc. thesis, University of Hannover, Germany.
- Neteler, M., D. Grasso, I. Michelazzi, L. Miori, S. Merler, and
C. Furlanello, 2004. New image processing tools for GRASS. - In Proc.
Free/Libre and Open Source Software for Geoinformatics:
GIS-GRASS Users Conference, 12-14 Sep 2004, Bangkok, Thailand.
- Neteler, M., D. Grasso, I. Michelazzi, L. Miori, S. Merler,
and C. Furlanello, 2005. An integrated toolbox for image registration,
fusion and classification. International Journal of Geoinformatics, 1(1), pp. 51-61.
(PDF)
i.spec.unmix,
Markus Neteler, University of Hannover, 1999
Updated to GRASS GIS 7: Yann Chemin, 2015
SOURCE CODE
Available at:
i.spec.sam source code
(history)
Latest change: Monday Jun 24 13:07:24 2024 in commit: 71dbc88614ccda943c73db28f3531855610f6146
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual