Using Layer 3D to Feature Class on generated layer inside model builder

Question

Hello everyone,

i try to generate multipatches from multiple rectangle polygons with z values using the "Layer 3D to Feature Class" tool. The layer containing the polygons was generated in the same model earlyer. The output is correct if i run the model inside modelbuilder with "add to display" turned on on the polygon layer, but not if not. Furthermore the output seems to be correct if the polygon layer was added to the display at least once. It does not have to be in the current scene. I guess the cause of this is, that the 3D properties of a layer, wich are used by "Layer 3D to Feature Class", are generated the first time it is displayed, not when it is generated.

Does anyone have some ideas how to overcome this?
Thanks for every answer.

GeorgZweyer · Answer

Hi everyone,

i found a little hack to get it going. I save a .lyr file of a layer that has the desired 3D-Attributes (no base height, take z values from features) and created a arcpy.mapping.Layer out of it in Python. Then i use replaceDataSource() to set the data source to my generated polygon class and then use the layer file as input for "Layer 3D to Feature Class". I still need to work on some invalid data errors if this is used with an Iterator, but basically it does what it should.

JeffreySwain · Answer

The tool will work within the application as described above. In terms of creating inputs via model builder without the application, I am not sure that it is even possible to complete this without the application.  You may try to use the Interpolate Polygon to Multipatch tool, but it will require a TIN to generate the height of the building.  You may also consider the Feature to 3D by Attribute tool to make the polygon for the building 3D at the base of the building prior to using in this tool.

GeorgZweyer · Answer

Hello Jeffrey. First of all thanks for your reply. Do you know another way to transform 3D polygones to multipatches? Cause i want to use them as input for the Intersect 3D tool wich only accepts multipatches. My final goal is what i described in this Thread Distribute points on building facades‌