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  1. PO
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    <p>Well, just trying to unpack the hex values in various ways...</p> <pre><code>#! /usr/bin/python import struct import binascii a = '04867C279DE2D6EC' b = '04867C27C030085E' c = '04867C27C230A5FE' formats = ['2I', '2i', '2f', 'd', '4h', '4H'] formats += ['&gt;'+item for item in formats] for fmt in formats: print fmt, '--&gt;' for item in [a,b,c]: coords = struct.unpack(fmt, binascii.unhexlify(item)) print ' ', coords </code></pre> <p>Yields some ideas...</p> <pre><code>2I --&gt; (662472196, 3973505693) (662472196, 1577595072) (662472196, 4272238786) 2i --&gt; (662472196, -321461603) (662472196, 1577595072) (662472196, -22728510) 2f --&gt; (3.5044675291578432e-15, -2.07824221089183e+27) (3.5044675291578432e-15, 2.4533886735682109e+18) (3.5044675291578432e-15, -1.0978789217059195e+38) d --&gt; (-1.9722947342913136e+216,) (9.4395557694675488e+144,) (-1.135288151092706e+302,) 4h --&gt; (-31228, 10108, -7523, -4906) (-31228, 10108, 12480, 24072) (-31228, 10108, 12482, -347) 4H --&gt; (34308, 10108, 58013, 60630) (34308, 10108, 12480, 24072) (34308, 10108, 12482, 65189) &gt;2I --&gt; (75922471, 2648889068) (75922471, 3224373342) (75922471, 3257968126) &gt;2i --&gt; (75922471, -1646078228) (75922471, -1070593954) (75922471, -1036999170) &gt;2f --&gt; (3.1617264522911893e-36, -6.0043925910101893e-21) (3.1617264522911893e-36, -2.7505106925964355) (3.1617264522911893e-36, -44.162101745605469) &gt;d --&gt; (7.3832340678903009e-287,) (7.3832347392384709e-287,) (7.383234778429458e-287,) &gt;4h --&gt; (1158, 31783, -25118, -10516) (1158, 31783, -16336, 2142) (1158, 31783, -15824, -23042) &gt;4H --&gt; (1158, 31783, 40418, 55020) (1158, 31783, 49200, 2142) (1158, 31783, 49712, 42494) </code></pre> <p>Unpacking it as a big-endian unsigned 32bit integer (>2I) looks a bit like it might be projected coordinates of some kind...</p> <pre><code> (-32.063657, 115.7658683) --&gt; (75922471, 2648889068) (-32.0633982, 115.7649085) --&gt; (75922471, 3224373342) (-32.0633846, 115.7653336) --&gt; (75922471, 3257968126) </code></pre> <p>If it is in UTM, it's probably UTM Zone 50S, based on the lat, long... We don't know the datum, but that shouldn't make more than a couple of hundred meters difference.</p> <p>For zone 50S:</p> <pre><code>(lat, long) --&gt; (Easting, Northing) (-32.063657, 115.7658683) --&gt; (383506.31320936838, 6451842.2821839228) (-32.0633982, 115.7649085) --&gt; (383415.3800562254, 6451869.9348384682) (-32.0633846, 115.7653336) --&gt; (383455.49221963808, 6451871.9016738012) </code></pre> <p>(Using OSR's (horribly unpythonic) python wrappers...)</p> <pre><code>from osgeo import osr def latlong2utm(lat, long): epsg_wgs84 = 4326 epsg_utm50S = 32750 inproj = osr.SpatialReference() inproj.ImportFromEPSG(epsg_wgs84) outproj = osr.SpatialReference() outproj.ImportFromEPSG(epsg_utm50S) transform = osr.CoordinateTransformation(inproj, outproj) x,y,_ = transform.TransformPoint(long, lat) return x, y </code></pre> <p>Unfortunately, it doesn't look like UTM Zone 50S, anyway... And Zone 49 doesn't look any better...</p> <p>So, not much help, but I figured I'd post this to help other folks who might be trying the same path... (I also tried unpacking things as IBM floats instead of IEEE floats... No luck there either...) Maybe I'm just being stupid, but I'm out of ideas. Hopefully this helps a bit, though...</p>
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    1. POCan anyone convert this 60-bit value to geographic coordinates?
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    1. CO+1 for using OSR. Even though the Python wrappers are... odd... I've still found it to be an incredibly powerful tool for interactive coordinate system transforms.
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