The buildings to the south of Sake are beginning to look very good. I have been doing some further building mapping around the central part of Goma and that is coming along nicely.
I have found quite a few old US Army maps (and other assorted public domain maps) of the area on the Perry-Castañeda Library Map Collection. See the full list of maps available here: http://www.lib.utexas.edu/maps/zaire.html In addition to tracing buildings, I have begun to sort through this list of maps and begun to orthorectify the ones that are the most useful. Although the maps have grid lines on them that in theory should be enough to perfectly orthorectify the images, however I have found that the maps are not that good in terms of absolute positional data but they are good from a relative standpoint and contain a lot of POI data and other useful things like elevations of mountain peaks and whatnot. There are also some 1:7500 scale maps from the mid 1990s with buldings and even a few POIs like hotels, banks, etc. These 1:7500 scale maps are avaliable for several cities in the congo so I plan to upload these as well. With this in mind, I have been fitting the ground control points to the actual map features (roads, rivers, etc) to the OSM data. This makes for a much better "fit" that nearly removes any spatial incaccuracy in the maps due to the limited surveying available at the time they were made. You can see all the maps I upload at the link below, for now it will be mostly further maps of the area we are currently working in, but I can work on any ones available if people have requests. http://mapwarper.net/users/82/maps AndrewBuck _______________________________________________ HOT mailing list HOT@openstreetmap.org http://lists.openstreetmap.org/listinfo/hot