Usage¶

To use cross_cal_resourcesat in a project:

cross_cal_resourcesat¶

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.

How to use¶

Clone the repository in the desired folder.

1	`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.

1	`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:¶

1	`python main.py`

Enter the input as prompted.

2. To use the library in the program:¶

First install the library.

1	`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

1	`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.

Last update: 2023-04-26