<div dir="ltr"><div>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.<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, May 30, 2015 at 8:22 AM, K Imran M <span dir="ltr"><<a href="mailto:drki.musa@gmail.com" target="_blank">drki.musa@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi all,<div><br></div><div>I am new to GIS so I apologize for this rather basic question.</div><div><br></div><div>I have a shapefile (ArcGIS) with the corresponding .prj file coded as below:</div><div><br></div><div>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]]</div><div><br></div><div>My questions are: </div><div>1) when I call this shp file into QGIS, which CRS should I choose to match the prj file?</div><div><br></div><div>2) does it match the Kertau (RSO)/RSO Malaya (m) (EPSG:3168) which has these codes</div><div><br></div><div>+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</div><div><br></div><div>3) or does it match the Kertau (RSO)/RSO Malaya (ch) (EPSG:3167) which has these codes</div><div><br></div><div>+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<br></div><div><br></div><div>Any help is greatly appreciated</div><div><br></div><div>Thanks</div><div><br></div><div>Kamarul</div><div><br></div><div><br clear="all"><div><br></div>-- <br><div><div dir="ltr"><div><div dir="ltr"><div style="font-family:arial;font-size:small;color:rgb(80,0,80)">Dr. Kamarul Imran Musa,</div><div style="font-family:arial;font-size:small;color:rgb(80,0,80)">M.D. M.Community.Med.</div><div style="font-family:arial;font-size:small;color:rgb(80,0,80)"><div>Associate Professor (Epidemiology and Biostatistics) & </div><div>Public Health Physician</div><div>Dept of Community Medicine</div><div>School of Medical Sciences</div><div>16150 Universiti Sains Malaysia, Kbg Kerian</div><div>Kelantan</div><div><span style="color:rgb(34,34,34)">Thomson Reuters </span><span style="color:rgb(34,34,34);font-family:Arial,sans-serif">researchID: </span><a href="http://www.researcherid.com/rid/G-4864-2010" style="color:rgb(17,85,204);font-family:Arial,sans-serif" target="_blank">http://www.researcherid.com/rid/G-4864-2010</a><br></div><div>Google-scholar: <a href="http://scholar.google.co.uk/citations?user=aZyayMgAAAAJ&hl=en&authuser=1" style="color:rgb(17,85,204)" target="_blank">http://scholar.google.co.uk/citations?user=aZyayMgAAAAJ&hl=en&authuser=1</a></div><div>blog: <a href="http://designdataanalysis.wordpress.com/" style="color:rgb(17,85,204)" target="_blank">http://designdataanalysis.wordpress.com</a> </div><div><span style="color:rgb(34,34,34)">email : </span><a href="mailto:drkamarul@kb.usm.my" style="color:rgb(17,85,204)" target="_blank">drkamarul@usm.my</a><span style="color:rgb(34,34,34)"> , </span><a href="mailto:k.musa@lancaster.ac.uk" style="color:rgb(17,85,204)" target="_blank">k.musa@lancaster.ac.uk</a></div></div></div></div></div></div>
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