Hi Walter, As an alternative to Wouter’s suggestion, I would recommend VRT’s (Raster ==> Miscellaneous ==> Build Virtual Raster) Not alone does it merge/mosaic but it also results in a small file size. It is also very easy to generate convert that VRT to any other format output, using gdal_translate (Raster ==> Conversion ==> Translate) I hope this helps, Kind 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 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/ —— MSc GIS, FME Certified Professional —— 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://www.opw.ie —— Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user <qgis-user-boun...@lists.osgeo.org> On Behalf Of Wouter Impens via Qgis-user Sent: 20 May 2022 11:04 To: qgis-user <qgis-user@lists.osgeo.org> Subject: Re: [Qgis-user] Problem merging 30-m SRTM tiles in QGIS 3.24.3 for MacOS 10.14.6 Hi Walter, I'm having good results using the 'r.patch' tool from GRASS for merging rasters. Hope this helps Greetings Wouter Op do 19 mei 2022 om 23:31 schreef Walter Alvarez via Qgis-user <qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>>: I’m trying to merge either two or twelve 30-m SRTM tiles using QGIS 3.14.3. In either case (2 or 12) I am stopped by the following problem: Using Raster > Miscellaneous > Merge… I get the “Merge" window. I try to use Input layers > Elements selected > “…" That takes me to the "Multiple Selection" window, showing the 2 or 12 files I want to merge (filenames: nXXeXXX_1arc_v3 [EPSG:4326]). After selecting all the files, when I click “OK” the "Multiple Selection Window” and the “Merge” window both disappear, and I cannot figure out what to do next, or do differently. I can’t figure out how to get past this problem and merge my tiles. Thanks for any help you can offer! Walter __________ Walter Alvarez Professor of the Graduate School Department of Earth and Planetary Science University of California Berkeley _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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