Hi, It would be possible, though it would depend on the raster and the bands (Red, Green, Blue, NIR etc..)you have available. It could be possible to use raster Classification to map these features, though I believe you would have quite a lot of false positives, due to shadowing, surface finish changes..etc.. If you where to look at it I would recommend the Semi-Automatic Classification Plugin
https://fromgistors.blogspot.com/p/semi-automatic-classification-plugin.html It can be installed through the Plugin installer. Please also see the Link below, it may be of further interest. https://link.springer.com/article/10.1007/s12544-015-0156-6 As you may see from the above, it does suggest that you supplement the Raster Imagery with additional datasets, which should help in the detection of road defects and the overall accuracy of your results. Sorry I cant be of more help, hopefully the above will help in some way. 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 <qgis-user-boun...@lists.osgeo.org> On Behalf Of krishna Ayyala Sent: 10 April 2020 16:02 To: qgis-user <qgis-user@lists.osgeo.org> Subject: [Qgis-user] Pavement defects Identification Hello, Is it possible to identify the pavement defects using a raster image with QGIS? If there is any tutorial about this, can you please direct me the tutorial. Regards.
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