I have been putting these buildings in as building=construction but they can also be simply building=no_roof or barrier=wall to indicate that there is a structure there to help the people on the ground identify where they are and indicate that there is something there. It is not possible for mapping from photos to be able to interpret or identify an abandoned building as to one under construction, just as it is not possible to identify which round structure is a residence or a grain store. If we approach the HOT mapping with the purpose of producing a basic map for people on the ground to achieve their task then trying to take it further and making it more complex will slow down the process and also add the element of uncertainty of what an item actually is and therefore lose confidence. As long as we indicate there is a structure there, then people on the ground can investigate if they need to. I believe that knowing there is something there is better than no knowledge at all. I would agree with showing it as barrier=wall so that it is visually different to that of a building and will indicate that we do believe that at the time of the imagery it was not occupied. I would apply this to a round structure without a roof as well. Either way we need to settle some of these tags so that we are all giving the same instructions and those trying to use our HOT mapping will be able to have some consistency in the output. We need to bear in mind that what we apply to our mapping in West Africa may not be compared to what applies in Haiti as the culture and living conditions vary considerably. Hence the existence of the Africa Highways guide. Keeping it simple provided it meets the requirements of the task in the field. Because we are continuously inviting new mappers into the HOT emergency mapping circle through the Task Manager the ideal would be something like Blake Girardot's "Satellite imagery interpretation examples" and "Africa Highways" in the instructions for these jobs and applicable to that specific part of the world. Again this is complicated by the variations in structures between urban and rural areas. Hope this helps
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