I ment as expressions, not variables. https://docs.qgis.org/latest/en/docs/docs/user_manual/working_with_vector/expression.html
Nicolas Cadieux Ça va bien aller! > Le 6 mai 2020 à 09:47, Nicolas Cadieux <[email protected]> a écrit > : > > Hi, > > A raster database has not been developed yet in QGIS, unless it was recently > add and don’t know about it. I did not know it could stored in the metadata. > I know some metadata (Like layer name, file name) can queried as variables. > Could this be used in a python script? Anyone??? > > Ultimately, you could do a raster to vector conversion and add the data in a > new database. You could make that layer transparent but still access the > dataset. > > Nicolas Cadieux > Ça va bien aller! > >> Le 6 mai 2020 à 00:03, Patrick Dunford <[email protected]> a écrit : >> >> Good day >> >> As we know, for vector layers, we can caption the layers with any field that >> is stored in the data table that is incorporated into each layer. >> >> With a raster layer, there obviously isn't an equivalent data structure >> attached within the raster file itself, but within the properties assigned >> to each raster layer that is incorporated into a Qgis project are metadata >> fields that can be filled in and presumably this data is stored within the >> project file for the layer concerned. >> >> Given that there is this data stored then I think there is a question that >> it should be possible to display any of the fields as a caption when the >> raster layer is visible on the canvas and unfortunately I cannot find any >> way of doing this. As I currently use various raster layers in my projects >> that are from various dates I would prefer to have some way of displaying >> the date associated with each layer within the canvas and this does not >> appear to be possible at present with the software. >> >> >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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