Add aggregation view for channel and georeferenced channel damages

[cymed]

I found having a view vw_tww_channel practical, especially when planning maintenance events. The view aggregates all reach geometries linked to a channel. For now, the view is read-only

[ponceta]

Thank you for this new functionnality!

@cymed do we have a way to control the attributes order of the created view?

As it is an aggregation of compoundcurves should it be a multicompoundcurve geometry?

[cymed]

As it is an aggregation of compoundcurves should it be a multicompoundcurve geometry?

Yes. LineMerge aggregates to singlepart if the aggregated lines touch, but in a database this is not always the case - better to use multipart

[ponceta]

Just as a small context comment, the LineMerge function aggregates to multilinestring and generalizes curved elements :

But as long as it is used in read only it should not break anything.

[cymed]

Added a view tww_app.vw_tww_damage_channel to georeference TV inspection damages

[sjib]

New feature that could help in this :

https://www.qgis.org/project/visual-changelogs/visualchangelog340/#feature-add-linear-referencing-symbol-layer-type

[cymed]

New feature that could help in this :

https://www.qgis.org/project/visual-changelogs/visualchangelog340/#feature-add-linear-referencing-symbol-layer-type

The feature does allow using a fixed interval, a z or an M value, or all vertices. None of these options work for channel damages. The feature is mainly good for hydrology