Hi Sofia, I unfortunately am unable to access the files you sent, as there are restrictions on our systems here in relation to accessing files. Apologies for that. Kind Regards,
Richard —— Richard McDonnell MSc GIS, FME Certified Professional Flood Risk Management - 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 46 942 2409 https://gov.ie/opw —— 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.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: ΣΟΦΙΑ ΤΣΙΤΟΥ <sofitsi...@gmail.com> Sent: 11 June 2024 14:34 To: Richard McDonnell <richard.mcdonn...@opw.ie> Cc: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Fwd: Export data with tiff and csv files in QGIS 3.36.3 [https://ssl.gstatic.com/docs/doclist/images/icon_10_generic_list.png] igme5000.tif<https://drive.google.com/file/d/1vxfYWoy-Z24hCoYXNwELB6gJqQC2I6c0/view?usp=drive_web>[X] Dear Richard, Thank you very much for your quick response. I followed this procedure many times but unfortunately I gοt null values. Attached you can find the files that I used (two different tiff maps-I use one map each time- and one csv file with the coordinates). I can't find out if there's a problem with my files or something I'm not doing right in the process. Thank you. Warm regards, Sofia Tsitou Στις Τρί 11 Ιουν 2024 στις 3:42 μ.μ., ο/η Richard McDonnell <richard.mcdonn...@opw.ie<mailto:richard.mcdonn...@opw.ie>> έγραψε: Hi Sofia, So I will start from the beginning, hopefully I understand your query properly… 1. Add your Raster to the Canvas 2. Using the Data Source Manager and Delimited Text, I add the CSV, making sure the Headers, Columns and rows are correct, while also setting/specifying the X, Y and Z fields (as required) 3. This will result in a Point Dataset being added to the Canvas, with the CSV loaded as a temporary layer 4. In the Processing Toolbox search bar, type “sample” and then select Sample raster values a. Input layer set to the Point Dataset b. Raster Layer set to the Raster you want to analyse c. Output column Prefix is handy if you have multiple datasets you want to sample, as you can change this for each subsequent sample. d. Sampled you can specify a Location for your output dataset, or you can leave it as a temporary layer until you have carried out all sampling. I hope that clarifies things, Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional Flood Risk Management - 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 46 942 2409 https://gov.ie/opw —— 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.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: QGIS-User <qgis-user-boun...@lists.osgeo.org<mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of S?F?? ?S???? via QGIS-User Sent: 11 June 2024 12:52 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] Fwd: Export data with tiff and csv files in QGIS 3.36.3 Dear QGIS team, I have two maps in tiff format and coordinates in csv format and I try through zonal statistics and sample raster values to export the data but it gives me null values. Could you tell me the steps to extract the data because I might be making a mistake? Thank you in advance, Sofia Tsitou -- Tsitou Sofia Αdjunct Lecturer Department of Economics University of Ioannina Greece Post Doctoral Fellow Department of Economics University of Macedonia, Thessaloniki Greece Research Fellow DAISSy Research Group Hellenic Open University Greece e-mail: sofitsi...@gmail.com<mailto:sofitsi...@gmail.com> Homepage: https://sites.google.com/view/sofiatsitou/home <https://sites.google.com/view/sofiatsitou/home> -- Tsitou Sofia Αdjunct Lecturer Department of Economics University of Ioannina Greece Post Doctoral Fellow Department of Economics University of Macedonia, Thessaloniki Greece Research Fellow DAISSy Research Group Hellenic Open University Greece e-mail: sofitsi...@gmail.com<mailto:sofitsi...@gmail.com> Homepage: https://sites.google.com/view/sofiatsitou/home <https://sites.google.com/view/sofiatsitou/home> -- Tsitou Sofia Αdjunct Lecturer Department of Economics University of Ioannina Greece Post Doctoral Fellow Department of Economics University of Macedonia, Thessaloniki Greece Research Fellow DAISSy Research Group Hellenic Open University Greece e-mail: sofitsi...@gmail.com<mailto:sofitsi...@gmail.com> Homepage: https://sites.google.com/view/sofiatsitou/home <https://sites.google.com/view/sofiatsitou/home>
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