Re: [libredwg] Fwd: please help transform of coords for Prishtina DXF

[address@hidden]

First of all it is a big test case, a complex on.

Also, how can we read these coordinates? There are many layers of them, 3.

libredwg will have to manage files like that,
mike

On Sun, Jan 24, 2010 at 5:22 PM, Felipe Sanches <address@hidden> wrote:
> the issue is not clear to me, how does that involve LibreDWG?
>
> On Sun, Jan 24, 2010 at 10:16 AM, address@hidden
> <address@hidden> wrote:
>> here is another test case
>>
>>
>> ---------- Forwarded message ----------
>> From: address@hidden <address@hidden>
>> Date: Sun, Jan 24, 2010 at 1:12 PM
>> Subject: please help transform of coords for Prishtina DXF
>> To: address@hidden, address@hidden, "PROJ.4 and general
>> Projections Discussions" <address@hidden>
>>
>>
>> I have here a dxf file of Prishtina in high quality.
>> http://www.archive.org/details/PrishtinaStreets
>>
>> I have been able to convert it to lat/lon like this
>> cs2cs +proj=utm  +zone=34T +ellps=WGS84 +datum=WGS84 +units=m -f \"%.7f\"
>>
>> Problem is that most of the points are in relative position, there is a grid.
>>
>> I have pushed a version of two nickels that can process alot of this :
>> To address@hidden:h4ck3rm1k3/TwoNickels.git
>>   c8e4009..41f23f1  master -> master
>>
>> It produces osm files with data in three groups :
>>
>> 1. points that are exact on the mark, (few)
>> 2. points on the equator (0,0) relative to something
>> 3. points that seem to be shifted over from utm34T
>>
>>         720496.25, 506444.9375 -> 22.987450699423831679, 
>> 4.5791053696411907481
>>
>> I have created averages of good points versus the shifted ones and
>> came up with these constant shifts:
>>        $n -= 187380;
>>        $e += 4228672;
>>
>> They are still 15km off of prishtina..
>>
>>
>> So I would like one of you to please help with the autocad and
>> transform all coordinates into some single form so I can convert them.
>> Or please advice on these points.
>>
>> thanks,
>> mike
>>
>>
>>
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