OpenStreetMap
martien-176
- Mapper since:
- April 11, 2019
- Last map edit:
- December 18, 2025
Hi, my name is Martien from The Netherlands, retired IT freelancer.
I am a volunteer mapper and validator for the Humanitarian OpenStreetMap Team.
My focus is on quality control and assurance. I am active in the HOT Training / HOT Quality Control & Assurance and the Validators Endorser Team.
HOT voting member.
I created these JOSM mapstyles:
Github and HOT OSM Slack display name: @martien-176
Latest Diaries
Diary Entry OSMCha and HOT validation
Introduction Humanitarian Openstreetmap Team (HOT) is an international team dedicated to humanitarian action and community development through ope...
Diary Entry OSMCha alternatives (sort of)
OSMCha (https://osmcha.org/) was down and i felt crippeled. This tool has become an essential part of my workflow lately. So to be prepared for th...
Diary Entry Onboarding New Mappers
As a validator and #Slack validation channel visitor I am regularly confronted with complaints from fellow validators about the sometimes bad quali...