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Making maps that save lives: Arnoud Keizer in the Philippines 

volunteer Arnoud Keizer teaches Anita Ayuban how to use a GPS mapping device Peter Caton

Volunteer Arnoud Keizer teaches Anita Ayuban how to use a GPS mapping device

Typhoons, earthquakes and floods occur often in the Philippines, a country that experiences the consequences of climate change. In November 2013 Typhoon Haiyan tore a path of destruction through the Philippines affecting over 14 million people. The homes of five million people were damaged or destroyed, and over 6,000 people lost their lives. Volunteer Arnoud Keizer has spent nine months with the Filipino government and communities affected by disasters. He is supporting national efforts to use science and technology to prepare for and prevent future devastation. 

Where floods, typhoons and earthquakes are the norm  

74 year-old community leader Anita Ayuban from the region of Bohol, Philippines, has lived her entire life facing floods and typhoons, “One year we suffered a very strong typhoon. Our roof was blown from the house so we went underground for safety...but it became full of water,” she recalls, adding, “I was very afraid, especially for my children.” 

Anita and her family were eventually rescued by neighbours, but she has since remained haunted by the devastation a natural disaster can bring when a community is unprepared. 

Driven by a desire to help her community prepare better for future typhoons, Anita is one of forty local community leaders in the town of Alicia in Bohol who participated in an OpenStreetMap workshop conducted by VSO volunteer Arnoud Keizer. It is one of several workshops Arnoud has been conducting in disaster-prone areas across the Philippines in an effort to help communities prepare more effectively for future natural disasters. 

Digital mapping and flood modelling 

“Disasters happen in the Philippines often, yet a lot of the emphasis is on how to respond to disasters instead of preparing for and actually preventing disasters” explains Arnoud, whose professional experience in the Netherlands managing large infrastructural projects on waterways focuses almost entirely on disaster preparedness and prevention. 

His OpenStreetMap workshops train community leaders how to use GPS devices to digitally map their villages, making use of the free online software with the specific purpose of mapping critical infrastructure e.g. – hospitals, schools, pharmacies, police stations etc. 

“Knowing in advance where important buildings at least risk of flooding are located; which places are most suitable for evacuation centres and how likely a place can be reached after an earthquake is lifesaving information”, explains Arnoud. 

OpenStreetMap is freely available online and its data is uploaded, stored and managed by volunteers, making it an ideal platform for disaster preparedness. After Arnoud trains community leaders, they in turn mobilise local volunteers to support the process of GPS mapping their communities, enabling volunteers to actively participate in disaster preparation measures. 

“The province of Bohol suffered a major earthquake in 2013, killing more than 200 people, and it was digitally mapped in the aftermath...but so much damage and destruction could have been avoided if it was mapped and the disaster planning had been done in advance”, says Arnoud. 

Digital mapping and flood modelling  the Philippines Peter Caton

Volunteer Arnoud is supporting the government to produce reliable and up to date 3D images of the country's 18 major river basins

Preventing future disasters 

When he’s not conducting workshops in disaster-prone areas, Arnoud spends his time in the capital city of Manila project managing components of the Filipino government Project DREAM (Disaster Risk and Exposure Assessment for Mitigation). It is a nationwide programme for creating sophisticated 3D hazard maps that can be used for identifying which areas are most likely to be affected by flooding. 

The project’s goal is to produce flood maps for the country’s major river basins, with the aim of producing the most accurate flood maps possible for disaster-prone communities.

 “I visited Tacloban recently, and it was really devastating to see an evacuation centre had been placed so close to the sea where a lot of people died...our project could have prevented these type of casualties because if you compare the OpenStreetMap for the area with the hazard maps it is clear that it was not a safe location for an evacuation centre,”