Hi, I got some vectorial projected data. The data reference is stereographic where lat_0=53.354166 and lon_0=-114.8525 The data spec also gave me this: Major_Axis_Csp= 6378137 Minor_Axis_Csp= 6356752.31414 Gnomonic_Scale_Factor_Csp= 0.9984 Stereographic_Scale_Factor_Csp= 0.9996 Utm_Scale_Factor_Csp= 0.9996 Ups_Scale_Factor_Csp= 0.994 Rdps_Eccentricity_Squared_Csp= 0.00672267 False Northing= 0 False Easting = 0
So I tried to define a proj4 string to be used in QGIS. This is what I found so far: Major_Axis_Csp = +a Minor_Axis_Csp = +b False Northing = +y_0 False Easting = +x_0 I figured out based on major and minor axis the ellps is using GRS 1980 model What I cannot figured out is how to use the four scale factors in proj4. My fist assumption is to use Stereographic_Scale_Factor_Csp value for k_0 scaling factor. Did someone encountered such projection specifications? This is the proj4 string that I defined +proj=sterea +lat_0=53.354166 +lon_0=-114.8525 +k_0=0.9996 +x_0=0.0 +y_0=0.0 +a=6378137 +b=6356752.31414 +ellps=GRS80 +units=m +no_defs Do you think is correct? Thank you, Marian ________________________________ This electronic message, as well as any transmitted files included in the electronic message, may contain privileged or confidential information and is intended solely for the use of the individual(s) or entity to which it is addressed. If you have received this electronic message in error please notify the sender immediately and delete the electronic message. Any unauthorized copying, disclosure or distribution of the electronic message is strictly forbidden. NAV CANADA accepts no liability for any damage caused by any virus and/or other malicious code transmitted by this electronic communication. Le présent message électronique et tout fichier qui peut y être joint peuvent contenir des renseignements privilégiés ou confidentiels destinés à l’usage exclusif des personnes ou des organismes à qui ils s’adressent. Si vous avez reçu ce message électronique par erreur, veuillez en informer l’expéditeur immédiatement et supprimez le. Toute reproduction, divulgation ou distribution du présent message électronique est strictement interdite. NAV CANADA n’assume aucune responsabilité en cas de dommage causé par tout virus ou autre programme malveillant transmis par ce message électronique. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user