This main objective of this study is the use of free and open source software to identify structural lineaments and enhancement of geological structures, without the need to use commercial software. In this study, a digital elevation model (DEM) with a resolution of 12.5 m ALOS PALSAR was used on which the different relief visualization techniques were performed, obtaining structural guidelines and enhancement of geological structures (possible faults), in addition graphs were made of rosettes and histograms, with the help of free and open source software such as SAGA GIS, QGIS 3.4.12, Stereonet and OpenStereo. The lineaments were analyzed by azimuth frequency, using different methods; Multidirectional shading, Shading with light variation every 30°, Combined shadows, Red Relief Image Map (RRIM); and finally the obtaining and processing of structural guidelines was carried out with each...