I3S

This article is a stub.

What is SLPK?

A Scene Layer Package (SLPK) file is an openly published file format for 3D geospatial data, designed as a package for storage or exchange that captures all resources for a "scene layer" structured according to the Indexed 3D Scene Layer (I3S) specification. The I3S/SLPK specification originates from Esri. A scene layer displays one of four data types: points, point cloud, 3D objects, or an integrated mesh.

How to create a SLPK?

In this documentation we will look on how to export a SLPK with ArcGIS Pro. To learn more about ArcGIS Pro visit ESRI's ArcGis Pro Documentation. In order to export a 3d model as a SLPK it first must be imported into ArcGIS Pro and Georeferenced if it has no world coördinates. ArcGIS Pro allows for the following file formats to be imported:

• DWG (Drawing) Used in CAD packages. Can be exported from most 3d animation packages.
• OBJ (Wavefront object) Used in most 3d animation packages like Autodesk 3dsmax and Maya.
• DAE (Collada) Used in most 3d animation packages like Autodesk 3dsmax and Maya.
• 3DS (3d studio) Used as an exported file from Autodesk 3dsmax.
• FLT (OpenFlight) Used in MultiGen Creator.
• WRL (Virtual Reality Modeling Language File)A VRML file format for representing 3D vector graphics.

There are differences in how a DWG file is added to your project from other 3d file formats. We will explain both methods below.

Creating a new ArcGis project

To add a 3d model like CAD or OBJ you should first create a new project in ArcGis Pro. When starting a new project make sure that you select a local Scene from the Blank Templates section. You can convert a local scene to a global scene after you have imported your model(s).

Adding a DWG file to ArcGIS Pro

If you are working with CAD data follow this procedure to import a DWG file:

How to import a DWG file into ArcGis:

1. In ArcGis go to the "Map" tab and select "Add Data"
2. Choose the DWG file
3. Select Multipatch

Importing other 3d files to ArcGis Pro

To import other 3d files like OBJ, DAE, 3DS, FLT or WRL follow this procedure:

How to import 3d files:

1. In ArcGis go to the "Analysis" Tab and select "Tools".
2. On the right pane select the "Import 3D Files" tool or type it in the search bar to find it.
3. In the "Input files" field click on the folder icon next to the field and browse to the 3d file you want to import
4. A name will be automatically generated in the "Output Multipatch Feature Class" field.
5. Select a Coordinate system from the dropdown menu or select an other system by clicking on the grid sphere icon next to the field.
6. Select "Y is Up" only if your 3d model was exported from a package wich uses Z is up.
7. Click on "Run" at the lower right of the pane.
8. After it is finished ArcGis will have created a Multipatch feature which can be located on the Contents Pane on the left. Note that your original 3d imported file is also present, but we will be using the multipatch for further conversion to SLPK.

Georeferencing your imported model

Imported models, if they are created in a package wich does not have global coordinates, are imported without a global reference for the location on the map. To move your imported model to the right location on the map follow this procedure:

How to Georeference 3d models:

1. In ArcGis, select your 3d object from the Contents pane or the Viewport.
2. Go to the "Edit" tab. The tools section will appear
3. Select the "Move" tool and drag the 3d model along one of the axes to translate it on the map to the desired location.
4. If desired, the object can be rotated and/or scaled with the "Rotate" and "Scale" tools
5. Make sure that the object is at the proper height relative to the ground