topic Re: Question about legend for a feature layer from an offline geodatabase. in Qt Maps SDK Questions

Question about legend for a feature layer from an offline geodatabase.

ISSRWEB — Sat, 11 Dec 2021 08:09:06 GMT

Hello.

I am trying to add two feature layers from an offline runtime geodatabase and am not being able to access any legend information for these layers. I can access the legendInfos for dynamic map services layer.

Is this by design, or a bug?

In this case layer.legend returns an empty object (code below). Any help is appreciated.

Thank You

            if(layer.layerType === Enums.LayerTypeFeature){
console.log(JSON.stringify(layer.renderer));
console.log(JSON.stringify(layer.legend));          
  }

Re: Question about legend for a feature layer from an offline geodatabase.

LucasDanzinger — Thu, 07 Apr 2016 16:26:38 GMT

This is a bug/known issue with 10.2.6. Our upcoming Quartz release of ArcGIS Runtime will support getting legend info from feature layers. In fact, beyond bringing in support for retrieving legend info on all layer types, we have greatly simplified the workflow for creating a legend control with our upcoming Quartz release.

Re: Question about legend for a feature layer from an offline geodatabase.

DanielBachmann1 — Tue, 03 May 2016 16:32:41 GMT

Hi,

had the same problem trying to get infos about symbology. Only solution was to query the SQLite-Database (.geodatabase) using QtSql-API and grab the JSON describing the renderer. Most information is stored in the columns ItemInfo and AdvancedDrawingInfo of table GDB_ServiceItems.

Daniel

Re: Question about legend for a feature layer from an offline geodatabase.

ISSRWEB — Wed, 08 Jun 2016 23:08:57 GMT

Genius...thank you for the tip Daniel, will try that.