[Qgis-user] Re: Projection of Shapefile export

Thu Mar 17 18:57:32 PDT 2011

Not that I'm aware of Matt. I'm running the same system as you.

Rumoured to be fixed on the upcoming major release of 1.7.

Brett

On 17/03/2011 1:04 PM, Matt Boyd wrote:
> Has there been any progress on this in the osgeo installer? I just
> installed qgis on a windows 7 machine and I think I'm getting a
> mismatch.
>
> Thanks
> Matt
>
> On Wed, Oct 6, 2010 at 10:21 AM, Brett Adams
> <badams at spinifexgeophysics.com.au>  wrote:
>> That's unfortunate. Good to know its repeatable.  At least the problem has
>> been isolated and we know what's required to get it fixed (or so I think).
>>
>> Time to find some professional help. I'll keep you informed.
>>
>> Brett
>>
>> On 5/10/2010 11:36 AM, Roland Hill wrote:
>>
>> Brett,
>>
>> I am using Linux and from a previous email I think Ken is as well. Yes, it
>> is working on my Linux system.
>>
>> I tried installing QGIS onto a Windows 7 system using both the Standalone
>> and OsGeo installers. In both cases I couldn't get it to work correctly. The
>> standalone installer version placed AGD66 and GDA94 versions of my test
>> point 11m apart when it should be more like 200m. The OsGeo version just
>> refused to display the AGD66 point.
>>
>> I am not sure where to go with it on Windows. I haven't used it for a long
>> time. Maybe someone more familiar with the Windows setup can help.
>>
>> Cheers,
>>
>> Roland
>>
>>
>>
>> --
>> ROLAND HILL
>> Director
>> Four Winds Technology Pty Ltd
>> Ph/Fax :  +61 (0)2 6366 9425
>> Mobile :  +61 (0)41 880 7472
>> Roland.Hill at fourwindstechnology.com.au
>>
>> Privacy and Confidentiality Notice
>> The information contained herein and any attachments are intended solely for
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>>
>> On 04/10/10 17:06, Brett Adams wrote:
>>
>> Roland / Ken,
>>
>> Sorry to disappear like that. Got called into the dessert for a few days.
>>
>> I tried loading these new files up but can't get them to work. All three
>> projections are now plotting in exactly the same place.
>>
>> Ran a search on the QGIS directory and replaced the AGD84 / AGD66 gsb files
>> with the new ones. Also replaced the srs.db file.
>>
>> I'm assuming you both got this to work. Am I missing a step?
>>
>> Brett
>>
>>
>>
>> On 24/09/2010 7:25 PM, Roland Hill wrote:
>>
>> Ken / Brett,
>>
>> The only thing we know for certain is that we are all out of our depths!
>> Regardless, I think we are on the way to solving this.
>>
>> Please find a new srs.db here http://dl.dropbox.com/u/9546967/srs.db. The
>> new file incorporates both towgs84 parameters and a reference to the
>> distortion files. The distortion file values appear to take precedence, but
>> I have included the towgs84 parameters as it looks like the AGD84 distortion
>> files do not cover the states and territories that did not adopt AGD84. Note
>> that I have changed the AGD66 towgs84 parameters to national ones
>> (previously ACT) according to this document (page 31)
>> http://www.icsm.gov.au/gda/gdatm/gdav2.3.pdf.
>>
>> To use the distortion files you need to place these files
>> http://dl.dropbox.com/u/9546967/agd66.gsb
>> http://dl.dropbox.com/u/9546967/agd84.gsb in your Proj data directory
>> (/usr/share/proj on Linux). It is the directory containing the 'epsg' and
>> 'proj_def.dat' files. Make sure that this is the directory your Proj
>> installation is actually using by checking the contents of the PROJ_LIB
>> environment variable (echo $PROJ_LIB). It may not be set, which is OK. It
>> took me about 4 hours to figure out I had set it to an old development
>> directory several years ago!
>>
>> Note that I did try it without the +wktext parameter. It works in Proj
>> (using cs2cs), but QGIS needs it.
>>
>> Let me know how it goes on your test points.
>>
>> Cheers,
>>
>> Roland
>>
>>
>> --
>> ROLAND HILL
>> Director
>> Four Winds Technology Pty Ltd
>> Ph/Fax :  +61 (0)2 6366 9425
>> Mobile :  +61 (0)41 880 7472
>> Roland.Hill at fourwindstechnology.com.au
>>
>> Privacy and Confidentiality Notice
>> The information contained herein and any attachments are intended solely for
>> the named recipients. It may contain privileged confidential information. If
>> you are not an intended recipient, please delete the message and any
>> attachments then notify the sender of miss-delivery. Any use or disclosure
>> of the contents of either is unauthorised and may be unlawful. All liability
>> for viruses are excluded to the fullest extent permitted by law.
>>
>> On 24/09/10 07:27, Ken Norris wrote:
>>
>> Roland,
>> I incorporated your srs.db but the translation falls about 30m short (in
>> Melbourne) and about the same distance out at a control point in southern
>> Tasmania.
>> I see you use the National parameters that '... have an estimated accuracy
>> of about 1 metre.' and are most accurate around Canberra (surprise).
>> Geoscience recommend use of their distortion tables (xxx.gsb) for more
>> accurate work Australia-wide.
>> Can you incorporate the parameter reference to the distortion tables in the
>> srs.db? I, like Brett, am out of my depth here.
>> Regards
>> Ken
>>
>>
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>>
>>
>> --
>> Brett Adams
>> Spinifex Geophysics
>> 0438 861 974
>> SKYPE:brettadams_spinifex
>>
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-- 
Brett Adams
Spinifex Geophysics <http://www.spinifexgeophysics.com.au/>
0438 861 974
SKYPE:brettadams_spinifex
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