[Qgis-user] matching .prj (ArcGIS) with CRS in QGIS

K Imran M drki.musa at gmail.com
Sun May 31 19:12:39 PDT 2015


Dear Nicolas,

The contents on the website are way too complicated for an untrained person
like me. So I have to resort to Andre's suggestion.

Thanks

regards
Kamarul



On Sun, May 31, 2015 at 11:13 PM, Nicolas Cadieux <
nicolas.cadieux at archeotec.ca> wrote:

> Hi,
>
> I have done this in the past using documents found here. Qgis uses proj.4
> syntax.
>
> http://ie.unc.edu/cempd/projects/mims/spatial_beta/external/PROJ4.html
>
> You can create user defined projection in "Setting/custom CRS".
>
> Good luck!
>
> Nicolas Cadieux M.Sc.
> Les Entreprises Archéotec inc.
> 8548, rue Saint-Denis Montréal H2P 2H2
> Téléphone: 514.381.5112  Fax: 514.381.4995
> www.archeotec.ca
> On May 31, 2015 10:30 AM, "K Imran M [via OSGeo.org]" <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=5208323&i=0>> wrote:
>
> Dear Andre,
>
> Is it possible, because of the different WKT string specification, my
> shape files was misaligned for about 200 meters to 300 meters when I chose Kertau
> (RSO)/RSO Malaya (m) (EPSG:3168) as the projection (OTF)?
> In view of that issue, can you advise me if I
> 1) can I still use the Kertau (RSO)/RSO Malaya (m) (EPSG:3168)
> projection? Or
> 2) should I transform the projection to any other projection? Or
> 3) should I use the User-define CRS? If yes, how can I do that?
>
> I apologize for any trivial questions here. Your responses is very much
> appreciated.
>
> Thanks and best wishes,
>
> Kamarul
>
>
>
>
>
>
> On Sun, May 31, 2015 at 10:00 PM, Andre Joost <<a
> href="/user/SendEmail.jtp?type=node&node=5208316&i=0">[hidden
> email]> wrote:
> Am 30.05.2015 um 23:31 schrieb Nicolas Cadieux:
> Hi,
> I am assuming QGIS cannot read this projection?
>
>
> You are right, the projection name is not known for QGIS.
>
> The WKT string for Kertau RSO is:
>
>
> PROJCS["Kertau (RSO) / RSO Malaya (m)",
>     GEOGCS["Kertau (RSO)",
>         DATUM["Kertau_RSO",
>             SPHEROID["Everest 1830 (RSO 1969)",6377295.664,300.8017,
>                 AUTHORITY["EPSG","7056"]],
>             AUTHORITY["EPSG","6751"]],
>         PRIMEM["Greenwich",0,
>             AUTHORITY["EPSG","8901"]],
>         UNIT["degree",0.0174532925199433,
>             AUTHORITY["EPSG","9122"]],
>         AUTHORITY["EPSG","4751"]],
>     PROJECTION["Hotine_Oblique_Mercator"],
>     PARAMETER["latitude_of_center",4],
>     PARAMETER["longitude_of_center",102.25],
>     PARAMETER["azimuth",323.0257905],
>     PARAMETER["rectified_grid_angle",323.1301023611111],
>     PARAMETER["scale_factor",0.99984],
>     PARAMETER["false_easting",804670.24],
>     PARAMETER["false_northing",0],
>     UNIT["metre",1,
>         AUTHORITY["EPSG","9001"]],
>     AXIS["Easting",EAST],
>     AXIS["Northing",NORTH],
>     AUTHORITY["EPSG","3168"]]
>
> which looks similar to the one given, but the ellipsoid major axis is
> different, and False Easting.
>
> For the different namings of the projection, see
>
> https://trac.osgeo.org/gdal/ticket/2745
> http://lists.maptools.org/pipermail/proj/2010-September/005349.html
>
> HTH,
> André Joost
>
>
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>
> --
> Dr. Kamarul Imran Musa,
> M.D. M.Community.Med.
> Associate Professor (Epidemiology and Biostatistics) &
> Public Health Physician
> Dept of Community Medicine
> School of Medical Sciences
> 16150 Universiti Sains Malaysia, Kbg Kerian
> Kelantan
> Thomson Reuters researchID: http://www.researcherid.com/rid/G-4864-2010
> Google-scholar: <a href="
> http://scholar.google.co.uk/citations?user=aZyayMgAAAAJ&hl=en&authuser=1"
> style="color:rgb( 17 , 85 , 204 )">
> http://scholar.google.co.uk/citations?user=aZyayMgAAAAJ&hl=en&authuser=1
> blog: http://designdataanalysis.wordpress.com
> email : <a
> href="/user/SendEmail.jtp?type=node&node=5208316&i=2">[hidden
> email] , <a
> href="/user/SendEmail.jtp?type=node&node=5208316&i=3">[hidden
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-- 
Dr. Kamarul Imran Musa,
M.D. M.Community.Med.
Associate Professor (Epidemiology and Biostatistics) &
Public Health Physician
Dept of Community Medicine
School of Medical Sciences
16150 Universiti Sains Malaysia, Kbg Kerian
Kelantan
Thomson Reuters researchID: http://www.researcherid.com/rid/G-4864-2010
Google-scholar:
http://scholar.google.co.uk/citations?user=aZyayMgAAAAJ&hl=en&authuser=1
blog: http://designdataanalysis.wordpress.com
email : drkamarul at usm.my <drkamarul at kb.usm.my> , k.musa at lancaster.ac.uk
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