Yes, AMS-2 is for US Army Map Service (AMS), Series G504, 1955- (1:250,000) (Actually many from 1963).
Unfortunately, its available maps only cover the extreme north of Liberia (beside Sierra Leone and Guinea): https://www.lib.utexas.edu/maps/ams/west_africa/txu-oclc-6595921-index.jpg There is also an older AMS Series G541, from 1942, which is apparently available only for Sierra Leone - that it covers entirely, and has been set up in layer 167: http://mapwarper.net/layers/167 available as TMS (in JOSM syntax) as: http://mapwarper.net/layers/tile/167/{zoom}/{x}/{y}.png It is the only layer (among the three layers of US topographic maps, JOG, AMS-2 and AMS) that includes a map over Bonthe District. It can also be interesting to see the historic evolution, and sometimes "old_name" or "alt_name". Best wishes, Jean-Guilhem Le 20/08/2014 16:44, Andrew Buck a écrit : > I am working on rectifying some more of the white AMS maps, but if I > recall correctly, even the ones that cover liberia are basically > blank. I do not know of any other sources that are free of copyright > for the area. > > You can see the map layer and which maps have yet to be rectified here: > > http://mapwarper.net/layers/150 > > Note that when new maps come online you might have to right click in > josm and do the 'flush tile cache' before they will show up for you. > > For the ones that you are not sure of, even just getting a fixme tag > on them and leaving them where they are is an improvement. They tend > to be within a mile or two of their correct position anyway so just > having them in the DB for nominatim is already a step forward. > > -AndrewBuck > > > On 08/20/2014 09:13 AM, Blake Girardot wrote: > > The white maps only seem to cover SL and northern Liberia. > > > The JOG map seems to be the only locating reference for the > > majority of Liberia. > > > If there is some other good source for location in Liberia I'd love > > to know about it. The JOG map is good for the items it has, but > > there are a lot not on that map. > > > The square I am working on now has 280 nodes imported from GNS (the > > most I have seen so far), but only about 80 are on the JOG map > > leaving the other 200 to basically be just guesses based on what is > > nearby and since they are all marked as skip=yes just going by > > proximity is not very good. > > > Most of them I am just going to leave exactly where they imported > > and mark them fixme=location approximate > > > I would love another map source for Liberia. > > > > > > On 8/20/2014 9:45 AM, Tom Taylor wrote: > >> The work I've done so far has been easy because someone else did > >> most of it. However, I have noted source discrepancies: JOG, > >> AMS-2 (don't know what that is), but not the US Army Topo maps. > >> In fact, JOG is fairly sparse and the latter are the prime > >> source. Would AMS-2 be the US Army reference? Example: Node: > >> Tangahun (2967629931). > >> > >> Tom Taylor TomT5454 > >> > >> _______________________________________________ HOT mailing list > >> [email protected] > >> https://lists.openstreetmap.org/listinfo/hot > > > _______________________________________________ HOT mailing list > > [email protected] https://lists.openstreetmap.org/listinfo/hot > > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot
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