Second step: Field mapping with MapComplete

After completing the Mapathon, we use MapComplete to conduct field mapping, focusing on collecting additional tree attributes such as height, type of leaves, and tree species. This step complements the data gathered during the Mapathon, ensuring a comprehensive and accurate representation of the tree distribution in the selected area.

Process of the Second step of the Exercise

• Introduction to MapComplete: Participants are to be introduced to the MapComplete platform. The platform's purpose, features, and its use in creating custom map themes for specific mapping projects should be explained.

• Training and Demonstration: A tutorial on using MapComplete to add, edit, and tag trees with the custom theme should be provided to participants. The key features of the platform, such as searching for specific map elements, adding photos, and using the editing interface, should be highlighted.

• Field Mapping: Participants are to be instructed to venture into the selected area and begin mapping trees using MapComplete on their smartphones or tablets. The collection of as much information as possible about the trees, including species, height, and other relevant attributes, should be encouraged.

• Data Validation and Integration: Upon completion of the field mapping, participants are to be guided through the process of validating their collected data and integrating it into the OpenStreetMap database. The importance of ensuring data accuracy and adherence to OSM guidelines should be emphasized.

• Analysis and Discussion: Following the exercise, the mapped data should be analyzed to gain insights into the distribution of trees within the selected area and their role in mitigating climate risks. Participants should be encouraged to discuss their findings and share their experiences using MapComplete.

By using the MapComplete platform to carry out this tree mapping exercise, participants will not only gain valuable experience with a user-friendly mapping tool but also contribute to a better understanding of the role of trees in addressing local climate risks.

How to work with MapComplete in your smartphone

MapComplete is a user-friendly platform designed to make contributing to OpenStreetMap more accessible and enjoyable. It allows users to create custom map themes and offers easy-to-use tools for adding and editing map features. We will provide the step-by-step manual on how to work with MapComplete in your smartphone.

Fig 6: Open the URL https://mapcomplete.osm.be/.

Fig 7: Log in to the OSM platform. This is important because, without an OSM login, you cannot add any feature. Then click on the "Open the map" icon.

Fig 8: Look around the interface. The main navigation tools are located at the bottom of the screen. At the bottom right, you will see the quick switcher (1) between the OSM map and the Satellite map (note: the source of the satellite map is rendered based on your mapping location). Above it is the "Select layers" icon (2), where you can define a specific background layer for a purpose, for example, if you want to see the cyclopaths tracks. You can also go back to the themes browser here. The "Positions" icon (3) finds your location based on your smartphone's GPS signal. There are zoom in and zoom out icons (4). With the "?" icon (5), you can open the theme options, where you can find a description of the topic, create your own topic, and share the map with colleagues.

Fig 9: Click on the tree near "Click here to add a new item" to add a new tree that is missing.

Fig 10: Click on an existing tree object and edit the tags.

Fig 11: Leaf type (key: leaf_type).

Fig 12: Adjust the position if needed.

Fig 13: What species is this tree? (key: species).

Fig 14: What is the circumference? (key: circumference).

Fig 15: What is the height of this tree? (key: height).

Fig 16: How significant is this tree? (key: denotation).

Fig 17: You can now check all the attributes you have added.

Fig 18: In case you did the test mapping, you can delete the feature.