August 19th marks World Humanitarian Day (WHD) to recognize the efforts of humanitarian workers and to advocate for the survival, well-being and dignity of people affected by crises, and for the safety and security of aid workers. One of many factors that are essential for effective humanitarian response and the security of people on site is the availability of reliable maps and up-to-date geodata of crisis areas. This is usually ensured through crowdsourcing and there are many tools and proj...| GIScience Blog