Resume Ivan Arias
Former petroleum geologist retraining as a full-stack GIS developer — condensed one-page CV.
Former petroleum geologist retraining as a full-stack GIS developer — condensed one-page CV.
This guide covers the concepts you need before starting the QGIS course: the spatial data model, storage formats, and coordinate reference systems (CRS). CRS and projections are the main source of ...
Evidence-based Push/Pull/Legs routine prioritizing chest, legs and core.
A Beginner's Guide for GDAL + PostgreSQL/PostGIS + QGIS
A complete, reproducible runbook: install PostgreSQL 18 and PostGIS inside WSL2 Ubuntu, configure it for network access, and connect QGIS running on Windows. Each step includes the reasoning behind...
A hands-on walkthrough of storing, querying, and analyzing spatial data directly in a database using PostgreSQL and the PostGIS extension.
A condensed reference for the core concepts behind spatial databases — terminology, benefits, storage internals, connections, hosting, and SQL basics.
🪨 Geologist with 14+ years in subsurface work | Applying ArcGIS/QGIS, Python, and spatial data to geo-data and GIS-adjacent roles

A practical guide to QGIS expressions — filtering, labeling, styling, field calculation, and selection — with copy-ready examples.

Four methods to count the total number of airports and summarize them by country in QGIS.