Mapper since:
April 11, 2019

Hi, i am Martien van de Griendt from Nijmegen, The Netherlands. I am a freelance website developer.

As a volunteer for the Humanitarian Openstreetmap Team i do mapping and validating.

I am also active in the HOT Training / HOT Quality Control & Assurance / OSM Galaxy Working Group and the Validators Endorser Team.

My HOT OSM Slack display name is @martien