[Qgis-user] error loading tiff layer
regards. I could not load a layer in tiff format. The error that qgis shows is: "No transform is available between Unknown CRS: ENGCRS [" PCS Name = unnamed ", EDATUM [" "], CS [Cartesia ... and Unknown CRS: GEOGCRS [" unknown ", DATUM [" unknown ", ELLIPSOID [" WGS 8 ... . No coordinate operations are available between these two reference systems ". The file has a reference system, which is magna-sirgas from Bogota (3116), I have tried the magna-sirgas (3116) project, and wgs84 (4326) showing the same error. The version of qgis is 3.10.2-A Coruña. thank you very much for the help and I remain attentive [image: imagen.png] -- Humberto NFR ___ 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
Re: [Qgis-user] error loading tiff layer
The file may not be a geotiff and therefore require a seco d file in the directory in which it resides. A .twf or .aux file with the same name as your tiff file.Sent from my Samsung Galaxy smartphone. Original message From: Humberto Nel Florez Ramos Date: 2020-01-31 7:10 AM (GMT-04:00) To: Qgis-user@lists.osgeo.org Subject: [Qgis-user] error loading tiff layer regards.I could not load a layer in tiff format. The error that qgis shows is:"No transform is available between Unknown CRS: ENGCRS [" PCS Name = unnamed ", EDATUM [" "], CS [Cartesia ... and Unknown CRS: GEOGCRS [" unknown ", DATUM [" unknown ", ELLIPSOID [" WGS 8 ... .No coordinate operations are available between these two reference systems ".The file has a reference system, which is magna-sirgas from Bogota (3116), I have tried the magna-sirgas (3116) project, and wgs84 (4326) showing the same error.The version of qgis is 3.10.2-A Coruña.thank you very much for the help and I remain attentive -- Humberto NFR ___ 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
Re: [Qgis-user] error loading tiff layer
Thanks for the reply, but the file has all the information necessary to be loaded correctly. The file comes from arcgis, I have tried to load it with gvsig 2.5, SNAP desktop 6.0 and everything seems to indicate that they are not able to read the projection information correctly. i keep trying El vie., 31 ene. 2020 a las 8:01, kirk () escribió: > The file may not be a geotiff and therefore require a seco d file in the > directory in which it resides. A .twf or .aux file with the same name as > your tiff file. > > > Sent from my Samsung Galaxy smartphone. > > Original message > From: Humberto Nel Florez Ramos > Date: 2020-01-31 7:10 AM (GMT-04:00) > To: Qgis-user@lists.osgeo.org > Subject: [Qgis-user] error loading tiff layer > > regards. > I could not load a layer in tiff format. The error that qgis shows is: > > "No transform is available between Unknown CRS: ENGCRS [" PCS Name = > unnamed ", EDATUM [" "], CS [Cartesia ... and Unknown CRS: GEOGCRS [" > unknown ", DATUM [" unknown ", ELLIPSOID [" WGS 8 ... . > No coordinate operations are available between these two reference systems > ". > > The file has a reference system, which is magna-sirgas from Bogota (3116), > I have tried the magna-sirgas (3116) project, and wgs84 (4326) showing the > same error. > The version of qgis is 3.10.2-A Coruña. > thank you very much for the help and I remain attentive > > [image: imagen.png] > > > -- > Humberto NFR > -- Humberto NFR ___ 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
Re: [Qgis-user] error loading tiff layer
Hi, You can gave a raster using the correct coordinates (extents) but not with the CRS assigned. Could I suggest you utilise gdal_edit ( https://gdal.org/programs/gdal_edit.html ) and assign the CRS EPSG:3116 to the raster and try again? You can perform this within QGIS using the Processing tools just search for “edit” and select Assign Projection just select the valid CRS from the list and run it. Hope this helps, Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Humberto Nel Florez Ramos Sent: 03 February 2020 11:12 To: kirk Cc: Qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] error loading tiff layer Thanks for the reply, but the file has all the information necessary to be loaded correctly. The file comes from arcgis, I have tried to load it with gvsig 2.5, SNAP desktop 6.0 and everything seems to indicate that they are not able to read the projection information correctly. i keep trying El vie., 31 ene. 2020 a las 8:01, kirk (mailto:k...@nortekresources.com>>) escribió: The file may not be a geotiff and therefore require a seco d file in the directory in which it resides. A .twf or .aux file with the same name as your tiff file. Sent from my Samsung Galaxy smartphone. Original message From: Humberto Nel Florez Ramos mailto:hnflorezra...@gmail.com>> Date: 2020-01-31 7:10 AM (GMT-04:00) To: Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> Subject: [Qgis-user] error loading tiff layer regards. I could not load a layer in tiff format. The error that qgis shows is: "No transform is available between Unknown CRS: ENGCRS [" PCS Name = unnamed ", EDATUM [" "], CS [Cartesia ... and Unknown CRS: GEOGCRS [" unknown ", DATUM [" unknown ", ELLIPSOID [" WGS 8 ... . No coordinate operations are available between these two reference systems ". The file has a reference system, which is magna-sirgas from Bogota (3116), I have tried the magna-sirgas (3116) project, and wgs84 (4326) showing the same error. The version of qgis is 3.10.2-A Coruña. thank you very much for the help and I remain attentive -- Humberto NFR -- Humberto NFR ___ 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
Re: [Qgis-user] error loading tiff layer
El vie., 31 de ene. de 2020 a la(s) 08:10, Humberto Nel Florez Ramos ( hnflorezra...@gmail.com) escribió: > regards. > I could not load a layer in tiff format. The error that qgis shows is: > > "No transform is available between Unknown CRS: ENGCRS [" PCS Name = > unnamed ", EDATUM [" "], CS [Cartesia ... and Unknown CRS: GEOGCRS [" > unknown ", DATUM [" unknown ", ELLIPSOID [" WGS 8 ... . > No coordinate operations are available between these two reference systems > ". > > The file has a reference system, which is magna-sirgas from Bogota (3116), > I have tried the magna-sirgas (3116) project, and wgs84 (4326) showing the > same error. > > Humberto, ENGCRS is a WKT2 Engineering CRS keyword. So the file seems to be a GeoTIFF with a Engineering CRS. While EPSG:3116 Magna SIRGAS is a projected CRS. Engineering (or Topocentric) CRS may be converted to a Geocentric CRS as described in the Section 2.2.2 of the Geomatics Guidance Note 7, part 2 Coordinate Conversions & Transformations including Formulas [1]. I think that QGIS doesn't have support for this kind of CRS, but I think that PROJ does. So maybe you can find a pipeline string for the conversion from the Engineering CRS to the Projected CRS with projinfo, and then transform the GeoTIFF file with gdalwarp program (-ct parameter for the pipeline string). Once you have the GeoTIFF file reprojected to SIRGAS, you will have no problem loading it into QGIS. If you want to copy the WKT2 string, we can try to find the pipeline string to convert it to EPSG:3116. Kind Regards. Gabriel [1] Page 99 of http://www.epsg.org/Portals/0/373-07-02.pdf ___ 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
