topic Building Footprints: What's entered in the "BuildingPart" field? in ArcGIS Pro Questions

Building Footprints: What's entered in the "BuildingPart" field?

ScottFraser_Key-West — Fri, 01 May 2026 02:14:45 GMT

Not finding much documentation on what to enter and how to utilize the "BuildingPart" field in the Community Maps layer.

When a single building is made up of different parts, I'm guessing something entered into this field indicates the polygon within a polygon can be designated a building part, multiples of which constitute a single building. What might that entry be?

Example #1: A large building is internally divided into four similar sections. My intent is to show a single building composed of four sections.

Example #2: A large building has two sections with different building heights. While I'm able to enter the different building heights in the "Height" & "HeightUnits" fields if they're shown as different polygons, what gets entered in the "BuildingPart" field?

Re: Building Footprints: What's entered in the "BuildingPart" field?

DanielFox1 — Fri, 01 May 2026 14:44:11 GMT

Hi @ScottFraser_Key-West

In your example 1

• Create four polygons, one for each section
• Set BuildingPart = 1 for all four
• Do not include a separate outer footprint polygon
• (Unless you want it for cartography — then set that outer polygon to BuildingPart = 2)

Example 2

Set:
• BuildingPart = 1 for both polygons
• Fill in Height and HeightUnits for each polygon individually
Esri’s 3D basemap renderer will extrude each part to its own height.

Community Maps

Esri 3D Buildings

Re: Building Footprints: What's entered in the "BuildingPart" field?

ScottFraser_Key-West — Fri, 01 May 2026 17:35:52 GMT

Ahh... so with a similar building all the parts would have "2" entered within that building's parts, with subsequent building part groups noted consecutively?

Or, so I don't have to track which part number was last used, I'm guessing I could simplify use the actual building's number as the parts number (all our buildings are numbered). No need for these numbers to actually be consecutive... correct?

This is very helpful. I searched high and low trying to learn what actually gets entered into the "buildingPart" field. Thank you.