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Hey guys, how are you? In this video, I show you how to generate contour lines using two methodologies: Method 1 (Traditional): Extraction and Smoothing Method 2 (recommended): Reprojection/Resampling and Extraction I also explain the issue of raster image pixels, with a brief introduction to Alos Palsar, and why you should use the second method instead of the first. Finally, I show you a complement to the Mining Geotechnologies Course that works quickly and automatically with the theme of this video (Exclusive Content from the QGIS Course - Scripts/Models for ANM (Mining) and Environment - link https://hotm.art/ScriptsANMQGIS). Learn more about the Mining Geotechnologies courses. Access the link below: https://msha.ke/geotecnologias And don't forget to Subscribe, Like, Comment, and Share. Note: The boundaries of the Mining processes ARE PUBLIC DATA provided by the government's own systems through the ANM (National Mining Agency). Anyone can access this information without needing special access (SIGMINE and Mining Registry). All videos use official, public sources, and our content is merely illustrative and may contain information that does not reflect reality. The data is estimated only to exemplify and aid in learning. Every Mining process requires data validation in the field and research work, involving one, if not several professionals. The objective of the channel is to promote Geotechnological knowledge and contribute to teaching and learning in our country. Bear with me for the good. I am here to serve you, to help you. Hugs from Patrick Azevedo.