Thursday, 22 January 2015

qgis - Why are size-scaled symbols missing from map layout legend?




I have a designed a map using a scaled simple marker symbol. It is a rule-based design and symbol scaling is done by the siye assistant based on a field value for any of the rules in the same way. Everything works fine within the the map - legend / table of contents symbols are scaled according to map scale, within the print composer / item properties-window symbol scaling works fine as well.


However, the legend of my map-layout doesn't show any symbols.


Strange: changing scales in the layout (via map/item properties/scale) changes line spacing of my map-legend - indicating that there is information about how to scale symbols somewhere in the background.



... but the symbols remain invisible in the map-legend. Does anyone have any ideas?


QGIS 3.2 Mac and Windows.


symbol scaling 1:10.000symbol scaling 1:25.000




@tallistroan seems that there is a serious problem in version 3.2 ... following your workaround description resulted in correct scaled symbols on the map and ugly results in both the Advanced > Data-defined Size Legend tool and the composer legend. obviously the sizes do not correspond to the map scale and to symbol sizes within the map.


qgis application window / advanced data-defined size tool:composer output: enter image description here


composer window - ledend item properties and map-output: print composer / advanced data defined size legend




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