[Qgis-user] mysterious polygon

[Stephen Sacks]

Hi Harrissou,
    YES !  You've solved my problem and taught me something I knew 
nothing about.
Many thanks.
Steve



On 6/10/2023 8:57 PM, Harrissou s. wrote:
> Hi Stephen,
> You seem to have fallen in the annotation layer "trap" [0]. There is 
> no layer behind and polygon deletion is mentioned in the docs I 
> pointed to. Basically, select it with the "modify annotations" tool on 
> the same toolbar, and press Del.
>
> To create regular polygon feature, you have to select the layer, turn 
> it into edit mode and use digitizing tools. Read [1].
>
> Hope that helps.
> Harrissou
>
> [0] 
> https://docs.qgis.org/3.28/en/docs/user_manual/map_views/map_view.html#interaction
> [1] 
> https://docs.qgis.org/3.28/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#digitizing-an-existing-layer
>
>
> Le 11 juin 2023 01:22:43 GMT+02:00, Stephen Sacks via QGIS-User 
> <qgis-user at lists.osgeo.org> a écrit :
>
>     My intention was to create a new vector layer consisting of
>     several polygons.  I used the CreatePolygon tool to mark the four
>     vertices of a rectangle.  I must have done something wrong because
>     I've ended up with a polygon that seems to belong to no layer. In
>     desperation I ran the following python code, hoping to delete the
>     mysterious polygon, but it's still there.  Are some layers not in
>     the legend?  How do I  get rid of the polygon?
>     ========================
>     from qgis.core import QgsProject
>     from qgis.utils import iface
>
>     project = QgsProject.instance()
>     for lyr in project.mapLayers().values():
>         lyrName = lyr.name()
>         print (lyrName)
>         QgsProject.instance().removeMapLayers([lyr.id()])
>
>
>
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