My experience in the 2025 Validator Fellowship for Eastern and Southern Africa began on November 3rd, 2025, and concluded on January 7th, 2026, with all sessions held remotely. The fellowship consisted of 12 countries across Eastern and Southern Africa with 42 fellows. https://www.linkedin.com/pulse/introducing-2025-esa-validator-fellowship-z0nifutm_source=share&utm_medium=member_android&utm_campaign=share_via The program kicked off with an introduction to the Java OpenStreetMap Editor (JOSM), which was followed by an in-depth examination of its advanced features. This phase was particularly enlightening, as I discovered various validation tools that could significantly enhance the validation process. Before we could dive in the fellowship one had to complete a learning lesson. https://learning.hotosm.org/course/josm-skills-series

1. Introduction JOSM

https://docs.google.com/presentation/d/1YjRJpVQZ9BnY7xmHOswq1DDvJq5b3Id2YsEs81QWVt0/edit?usp=sharing

-JOSM training i.e mapping and validation using JOSM; task #19146, #34096

Reflecting on my earlier encounters with validation, I remember a time when my approach was rather simplistic; I would merely activate the validation tool, rectify minor errors, and quickly mark tasks as validated. My lack of confidence or hesitance to trust the accuracy of my work often deterred me from pursuing further validation, leaving me unaware of the more effective techniques that were at my disposal.

As I delved deeper into the training, I learned about essential tools such as Map Paint styles and JOSM plugins, ( https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.youtube.com/watch%3Fv%3DYZ2vFbGItWU&ved=2ahUKEwjWzoeM4v6RAxUgWUEAHSy-EyAQwqsBegQIFBAB&usg=AOvVaw0VXKSVry_BHx1hQfeYkytt) which streamline the validation process and facilitate the identification and correction of errors with greater efficiency. One of the most valuable shortcuts I acquired was the ability to square multiple buildings simultaneously, rather than addressing each one individually. The use of short cuts (ctrl f ) to query for example buildings which are wrongly tagged and you can select all of them then rectify the mistake at once. This realization was especially impactful, as it brought to mind a previous instance when I received feedback regarding my squaring of buildings. Initially, I reacted defensively, convinced that I had adequately squared all the structures. However, this experience ultimately illuminated the mistakes I had been making and underscored the necessity for ongoing learning and improvement in my validation practices.

One of the most fulfilling aspects of the fellowship was the strong emphasis on peer-to-peer engagement. This collaborative environment encouraged participants to share insights, discuss challenges, and exchange best practices. By learning from one another, we not only enriched our individual experiences but also fostered a supportive community that promoted growth and innovation. During my fellowship, I vividly recall participating in the Japan task, which involved mapping and validating damaged buildings. This experience required us to utilize imagery that was different from the standard resources we typically employed, along with adhering to specific tagging protocols. Initially, I felt a lack of confidence in my ability to contribute effectively to this task. However, after voicing my concerns within the group, I found that my apprehensions were shared by others, which fostered a collaborative environment. This was one of my first experiences with mapping in a structured context, and I am grateful for the opportunity to learn and grow through it. The task not only enhanced my technical skills but also reinforced the importance of communication and teamwork in overcoming challenges. The open exchange of ideas and constructive feedback among peers proved to be invaluable, as it allowed me to refine my methodologies and deepen my understanding of the validation landscape. This collective learning experience not only enhanced my skills but also strengthened my commitment to the goals of the fellowship.

Throughout the fellowship, I also gained insights into the third-pass validation process, culminating in data export, usage, and map creation.

https://drive.google.com/file/d/16AC5cssasa9bO2FH_ZvFgJkLnlPTJV5o/view?usp=sharing

While I have experienced many successes, I recognize that I have a limitation when it comes to managing multiple tasks simultaneously validating. This is an area where I am actively working to improve, and I am confident that with continued effort and practice, I will enhance my ability to juggle various responsibilities effectively. I believe that with time and dedication, I will reach a level of proficiency that allows me to handle multiple tasks with greater ease and efficiency. Well the essential focus should not be on the sheer volume of work completed, but rather on the quality of the output produced. While I may have made significant strides in the number of buildings and roads that I have mapped and edited and validated, the critical question remains whether the work has been executed to a high standard. It is imperative to assess not just the quantity of projects undertaken, but also the thoroughness and precision with which each task has been accomplished. Quality assurance in mapping and editing is vital, as it ultimately determines the effectiveness and usability of the work in real-world applications.

I am now equipped with a set of skills that I feel compelled to share with my community. The knowledge I have acquired not only enhances my own capabilities but also empowers me to contribute to the collective growth of others in the field. I believe that by disseminating this information, I can help foster a more knowledgeable and skilled community, ultimately leading to improved outcomes in our validation efforts. Thank you my team 🤗🙏