The difference between the 2 projections you mentioned is that the first, "Kertau (RSO)/RSO Malaya (m) (EPSG:3168)" uses meters as the units and the second, "Kertau (RSO)/RSO Malaya (ch) (EPSG:3167)" uses chains. you can tell from the "(m)" and "(ch)" at the end.The .prj specifies the Units as meters, So I think if you specify the projection as EPSG:3168 that should work.
On Sat, May 30, 2015 at 8:22 AM, K Imran M <drki.m...@gmail.com> wrote: > Hi all, > > I am new to GIS so I apologize for this rather basic question. > > I have a shapefile (ArcGIS) with the corresponding .prj file coded as > below: > > > PROJCS["Kertau_RSO_Malaya_Meters",GEOGCS["GCS_Kertau",DATUM["D_Kertau",SPHEROID["Everest_1830_Modified",6377304.063,300.8017]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Rectified_Skew_Orthomorphic_Natural_Origin"],PARAMETER["False_Easting",804671.299775],PARAMETER["False_Northing",0.0],PARAMETER["Scale_Factor",0.99984],PARAMETER["Azimuth",-36.97420943711801],PARAMETER["Longitude_Of_Center",102.25],PARAMETER["Latitude_Of_Center",4.0],PARAMETER["XY_Plane_Rotation",-36.86989764584402],UNIT["Meter",1.0]] > > My questions are: > 1) when I call this shp file into QGIS, which CRS should I choose to match > the prj file? > > 2) does it match the Kertau (RSO)/RSO Malaya (m) (EPSG:3168) which has > these codes > > +proj=omerc +lat_0=4 +lonc=102.25 +alpha=323.0257905 +k=0.99984 > +x_0=804670.24 +y_0=0 +no_uoff +gamma=323.1301023611111 +a=6377295.664 > +b=6356094.667915204 +units=m +no_defs > > 3) or does it match the Kertau (RSO)/RSO Malaya (ch) (EPSG:3167) which has > these codes > > +proj=omerc +lat_0=4 +lonc=102.25 +alpha=323.0257905 +k=0.99984 +x_0=40000 > +y_0=0 +no_uoff +gamma=323.1301023611111 +a=6377295.664 > +b=6356094.667915204 +to_meter=20.116756 +no_defs > > Any help is greatly appreciated > > Thanks > > Kamarul > > > > -- > 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 : drkama...@usm.my <drkama...@kb.usm.my> , k.m...@lancaster.ac.uk > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user >
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