We are team from Grab about to start work on OSM enhancing the map for Thailand City - Chiang Mai
As per our scope of work, we only concentrate on the areas served by Grab and not the entire city and we only focus on enhancing map for road network.
Basis our preliminary analysis for these cities, identified that ESRI and BING is best imagery to be used.
While we follow the standard OSM guidelines for mapping, posting the request here for help from local community best practices or country specific mapping guidelines to be followed.
We have created a new issue in our project page. For any questions and/or feedback please drop in a message
Thanks in advance