Just a little feedback here too - I did two squares using Potlatch - using the main imagery URL - and was able to trace all buildings and roads, I was a bit dissapointed I couldn't see any traditional huts, as the PDF guide said there would be, and assumed the areas was crops and trees. Anyhow, it was reasonably rapidly done and I marked the jobs as done.
Then I saw that alternative imagery was available, and this had less clouds, and a lot more buildings. I had to disqualify the squares I had done, and, like Sam was saying, spent quite a long time tracing a lot more buildings. This time, there were huts! I found the Potlatch2 editor and the imagery level not very good for drawing polygons around the small huts - I made a few errors, adding attributes to nodes instead of ways, and not correctly closing these small ways, I found that there were no instructions for adding the imagery to Potlatch from the tasking manager (but I knew how to do it anyhow). I found that there was no instructions for adding the .osm vector job square boundary, and so I added these instructions to the wiki page for the Tasking Manager. I also noticed that some buildings only appeared on one of the imageries. I wasn't able to determine the age of the imageries, and so did not know which one was more "true" - and so kept all structures that appeared in both. (I assume that the main one was nearer to now, but had cloud cover, and so the older one was provided which had no cloud cover) Anyhow, in summary, most of my points I could have solved doing a bit of reading around the task, forward planning and using JOSM! The size of the jobs were a bit too big, I think, even though the ones I chose were more rural. I added 320 buildings/ways over the two jobs squares. Hope this feedback helps! Tim
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