PyLEFA (Lineament Extraction Fracture Analysis) v. 0.62a

Analytical GUI remote sensing software for lineament detection and fracture analysis. Download Windows installation here

1.About pyLEFA Software

pyLEFA software is originally written in Python GUI application for satellite image (tested with Landsat and SRTM) analysis in Earth sciences. Lineament analysis is often being used for geological mapping, detecting natural hazards and prospecting of mineral resources. pyLEFA allows to: -Extract lineament features on satellite image (Landsat 7 and 8, SRTM and some others are supported); -Compute feature spatial distribution parameters (lineament density); -Compute Minkowski dimension of lineaments; -Detect fault by joining of lineaments; -Export features into ESRI shape format to continue work in GIS software. Author put his emphasis to the simplicity and absence of non-free software in pyLEFA. In contrast with now deprecated LEFA (Matlab based), PyLEFA doesn’t need any preinstalled software.

2.About the author

The Author, Dr. Sergei L. Shevyrev is researcher and associate professor. Research and teaching interests include regional geology, geotectonics and geodynamics, remote sensing, modeling and computer programming.

3.System Requirements and Third party tools

Hardware: PC with 3000 MB RAM Software: PyLEFA was tested with the Microsoft Windows (tm) 10 and expected to be compatible with the newer versions. 32 bit versions of Windows aren't supported. Data sources: Program could be used for analysis of Landsat and SRTM data affordable from the relevant repositories. Compatibility with the other data sources wasn’t analyzed. QuantumGIS (QGIS) software is recommended for geotiff and shape output stacking and projecting.

4.User’s obligations

This software can be used for any purpose, disassembled and reassembled. In any case reference and link to software website and author should be saved (look “How to cite” section. If you are opposed or disagree, please remove this software from your computer immediately.

5.How to cite this software

If you have used pyLEFA software in you research or study, please, put this link in your references: Sergei Shevyrev, 2024 LEFA: Lineament Extraction and Fracture Analysis. http://lefa.geologov.net

Or, please, cite some of articles below:

Shevyrev, S.; Boriskina, N. Analysis of Structural Position of Carlin-Type Gold Deposits with Lineament Analysis of Remote Sensing Data Using pyLEFA Software. Minerals 2025, 15, 219. https://doi.org/10.3390/min15030219

Shevyrev, S. Neotectonics, remote sensing and erosion cut of ore-controlling structures of the Mnogovershinnoe gold-silver deposit (Khabarovsk Krai, Russian Far East). Ore Geology Reviews, https://doi.org/10.1016/j.oregeorev.2018.11.016

Shevyrev, S, Carranza, EJM. Modelling of geodynamic regimes of precious metal‐bearing porphyry deposits: Lazurnoe deposit (Sikhote–Alin Belt, Far East) case study. Geological Journal. 2020; 1– 20. https://doi.org/10.1002/gj.3935

Shevyrev S.L., Gorobeyko E.V. First-Pass prospectivity mapping for Au–Ag mineralization in Sikhote–Alin Superterrane, Southeast Russia through field sampling, image enhancement on ASTER data, and MaxEnt modeling. Earth Science Informatics (2023) 16:695–716 https://doi.org/10.1007/s12145-022-00906-4

6.Disclaimer

Being of free experimental software, pyLEFA comes with NO warranty for its output and productivity. You are using it AT YOUR OWN RISK. Author are not responsible for any harm loses of profit and inconvenience. If you are disagreeing with that, please, remove pyLEFA from your computer immediately.

7.Affiliated organisation

Author expresses his gratitude to research institution he proudly represents, namely Far East Geological Institute of Far East Branch of Russian Academy of Science. Website: http://fegi.ru

8.Acknoledgement

Author gratefully dedicates his research efforts to beloved memory of his friend and teacher, professor Vadim G. Khomich.