Uniting over 12,700 global volunteers to map rural Tanzania to help end FGM and aid community development

Will you help us?

Learn more about how you can help us put rural Tanzania on the map!

Help to raise money for our project!


Our work

Crowd2Map Tanzania is a crowdsourced mapping project aiming to put rural Tanzania on the map. Since 2015, we have been adding schools, hospitals, roads, buildings and villages to OpenStreetMap with the help of volunteers worldwide and on the ground in Tanzania.

Our most recent efforts have been focused on fighting female genital mutilation (FGM) in the Serengeti region, and this excellent video by AJ+ news will tell you why:

How does it work? We are mapping buildings, roads and villages on OpenStreetMap via the Humanitarian OpenStreetMap Team (HOT) tasking manager. All of our tasks can be found here, and you can map or validate any of them!

The other part of our project focuses on gathering local knowledge: mappers on the ground use Maps.me app on smartphones or tablets, and printed fieldpapers to directly map their communities by adding points. Completed fieldpapers are emailed to online volunteers who input the data into OpenStreetMap and generate printable maps which they email back.

See more about how you can contribute here.

Get involved

You can map, validate, donate your old phone, donate via Global Giving, or volunteer to help in other ways!


We are mapping buildings, roads and villages via satellite imagery on OpenStreetMap – everyone can help. You need to register on OpenStreetMap.org, open HOT Tasking Manager and map one of these tasks on your computer.

All the instructions can be found in each task, and here is a helpful video to get you started.

If you are mapping locally in Tanzania, find Maps.me mapping instructions here.

If you would like to be partnered with a remote mapper to help with fieldpapers, please get in touch.


All maps on OSM need to be validated – just so we don’t leave any mistakes. Any more experienced mapper can do it.

If you have done validation before, head straight to one of these tasks on the HOT Tasking manager, and get started!

If you have never done validating before, contact usand we will walk you through it.


Have an unused working phone hidden away in your drawer? We can use it!

Send us your old or new unused phones, and we will use them to train more local people in Tanzania to map their own communities.

Don’t let it go to waste! Donate it.


Any donation, big or small, goes a long way in Tanzania. We are using donations to buy phones, train community change agents and run mapping workshop locally in Tanzania.

Donate today via Global Giving!