Open Geospatial Data being generated; Great. Wish I could join too. Hope you use, MAPS.ME (Android based) https://play.google.com/store/apps/details?id=com.mapswithme.maps.pro&hl=en_GB a great application which can be learned easily, within 10 minutes, or ODKcollect for a more structured data collection where you can design your own FORM. A related video for ODKcollect, just to initiate pl. https://www.youtube.com/watch?v=nnThhP-jVZI