cross_cal_resourcesat

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Introduction

This package applies a cross calibrates LISS III and AWiFS with the help of a reference image like Landsat 8 and Sentinel 2.

Takes two inputs:

• inpf_liss = path to folder LISS III or AWiFS bands
• inpf_ref = path to folder containing reference image bands. Could be Landsat 8 or Sentinel 2.

Final output folder:

• inpf_liss\Reflectance\Calibration

Three temporary images are also generated which are automatically deleted after the execution. These are two composite images, and one resampled image.

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Package information

A python package to cross calibrate ResourceSat 2 sensors like LISS III, AWiFS or LISS IV.

• Github repo: https://github.com/akhi9661/cross_cal_resourcesat
• PypI: https://pypi.org/project/cross-cal-resourcesat/
• Conda-forge: https://anaconda.org/conda-forge/cross_cal_resourcesat
• Free software: MIT license
• Documentation: https://akhi9661.github.io/cross_cal_resourcesat

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How to use

• Clone the repository in the desired folder.

git clone https://github.com/akhi9661/cross_cal_resourcesat.git

In case this fails, download the zip file and extract it in a folder.

• Install the required dependencies.

pip install -r requirements.txt

If it throws up an error, create a new virtual environment and install the dependencies. Installation of GDAL and rasterio is complex and generally fails in the base environment or an already existing environment. Creating a new virtual environment generally resolves this.

1. To run the library from the command line, use:

python main.py

Enter the input as prompted.

2. To use the library in the program:

• First install the library.

pip install cross_cal_resourcesat

• Import the dependencies in the environment

import rasterio, os, re, math, glob, shutil
from osgeo import gdal, osr, gdalconst
import numpy as np

• Import the library

import cross_cal_resourcesat

• Set the path to uncalibrated and reference image. The path provided should be absolute path and not relative.

inpf_liss = r'\docs\Examples\liss'
inpf_l8 = r'\docs\Examples\ref_l8'

• Call the do_calibration function.

cross_cal_resourcesat.do_calibration(inpf_liss = inpf_liss, inpf_ref = inpf_l8, reference_sensor = 'Landsat 8')

To use other reference sensors, select reference_sensor = 'Sentinel 2' or reference_sensor = 'Others'

Note: If reference sensor, other than Landsat 8 or Sentinel 2 is used, the path inpf_ref should be the path to folder containing reflectance images of reference sensor and not radiance images.

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Credits

This package was created with Cookiecutter and the giswqs/pypackage project template.