1.Validating Disparate Data Sources
Metric cards and bar chart · 2026
A development data analyst successfully merged 2007 Gapminder development indicators with CO2 emissions datasets, overcoming silent data-quality traps like mismatched ISO codes and missing entities. The dashboard documents these data engineering fixes, noting the handling of duplicate `iso_alpha KOR` records to avoid ambiguous mapping. It displays four key metric cards summarizing the 2007 snapshot, noting China and the United States account for 46.6% of total emissions, while a horizontal bar chart visualizes the top 12 countries by total CO2 emissions. This rigorous validation mirrors the data hygiene required when configuring manufacturing control software.
What it shows:
How to audit and merge disparate datasets into a reliable, presentation-ready snapshot.




