[Qgis-user] Captioning raster layers

[Nicolas Cadieux]

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 <nicolas.cadieux at archeotec.ca> 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 <enzedrailmaps at gmail.com> 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.
>> 
>> 
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