Ivan Arias

GIS & geospatial data

Evidence-based GIS work you can check

Aimed at entry-level and junior GIS roles: GIS Technician, GIS Analyst and Geospatial Data. Click any point to compare the raw record with the cleaned one.

Method

What is known → what can be done → how it was demonstrated → how it was verified → what the evidence supports.

This portfolio documents the development of a GIS professional through practical evidence. View the professional profile.

Datasets

The same 200 site records before and after cleaning, as browsable tables (they open in a new tab).

Raw data

The source layer exactly as received, with its inconsistencies left intact.

Cleaned data

The cleaned layer, with standardised values and quality flags.

Competencies and evidence

The portfolio is organised around 13 core GIS competencies. These two are backed by completed, verified work. Each has a competency page, a technical evidence page and a QGIS dashboard.

New competencies are published only once their supporting work is complete and verified. How the evidence is evaluated.