Hi, 2011/10/25, Shu Higashi <[email protected]>: >> First, which Projection method to use in JOSM? Mercator? Geographic? > > WGS-84 ? (I don't know JOSM's parameter)
I think it's WGS-84. I checked the both side of the railway which has a GPS log and found the offset values were mostly the same. Please check the wiki as below. http://wiki.openstreetmap.org/wiki/Turkey_Earthquake_2011#Inaccurately_placed_Bing_imageries >>> <JOSM> >>> offset: 30;-14 ? >>> >>> <Potlatch2> >>> diff(offset?): +0.00026, -0.00003 >>> for example >>> (Bing)43.31880, 38.52070 >>> (Ground)43.31906 , 38.52067 >>> http://www.openstreetmap.org/?lat=38.520231&lon=43.317905&zoom=18&layers=M >>> >>> 2.Re-align featured ways >>> -primary roads >>> -secondary roads >>> -railways >>> -waterways >>> -some huge objects >>> >>> 3.Re-align all objects >>> I think JOSM would be useful to move objects at once. >>> (Though I'm not good at using JOSM) >>> >>> Shu Higashi >>> >>> 2011/10/25, Shu Higashi <[email protected]>: >>>> Hi, Pierre >>>> Sorry for my poor English. >>>> >>>> 2011/10/25, Pierre Béland <[email protected]>: >>>>> Higashi showed on 2011-10-24 18:20:19 >>>>> a map of the railway line in Van from Potlatch2. >>>> >>>> My screenshot. >>>> http://wiki.openstreetmap.org/wiki/File:Offset_van_turkey.png >>>> >>>>> Without applying any offset to the Bing Imagery, I obtain a different >>>>> map >>>>> in >>>>> both Potlatch2 and JOSM. The roads, the railway and the building over >>>>> the >>>>> railway are apparently properly aligned. >>>>> >>>>> See map from Pottlatch2 at the following url : >>>>> http://pierzen.dev.openstreetmap.org/hot/railway-van-turkey.jpg >>>> >>>> Yes. your screenshot shows that roads and buildings arecorrectly >>>> aligned. >>>> But, when I showed a GPS trace (water color) it's slightly off toward >>>> South East. >>>> So I adjusted background imagery railway onto GPS trace using >>>> Potlatch2 toward South East. (My screenshot) >>>> Then, Roads, buildings and a railway need adjustment toward South East >>>> slightly. >>>> >>>> Shu Higashi >>>> >>>>> Pierre Béland >>>>> >>>> >>> >>> _______________________________________________ >>> HOT mailing list >>> [email protected] >>> http://lists.openstreetmap.org/listinfo/hot >>> >> >> >> >> -- >> cheers, >> maning >> ------------------------------------------------------ >> "Freedom is still the most radical idea of all" -N.Branden >> wiki: http://esambale.wikispaces.com/ >> blog: http://epsg4253.wordpress.com/ >> ------------------------------------------------------ >> > _______________________________________________ HOT mailing list [email protected] http://lists.openstreetmap.org/listinfo/hot
