Indexed 3d Scene Layer (I3S) is a specification created by Esri as a format for their 3D Scene Layer and scene services. The I3S reader handles RESTful webservices in an I3S file structure/format.

## Example¶

This example will download the Autzen dataset from the arcgis scene server and output it to a las file. This is done through PDAL’s command line interface or through the pipeline.

{
"pipeline":[
{
"filename": "https://tiles.arcgis.com/tiles/8cv2FuXuWSfF0nbL/arcgis/rest/services/AUTZEN_LiDAR/SceneServer",
"bounds": "([-123.075542,-123.06196],[44.049719,44.06278])"
}
]
}

pdal translate i3s://https://tiles.arcgis.com/tiles/8cv2FuXuWSfF0nbL/arcgis/rest/services/AUTZEN_LiDAR/SceneServer \
autzen.las \


## Options¶

count
Maximum number of points to read. [Default: unlimited]
spatialreference
Spatial reference to apply to the data. Overrides any SRS in the input itself. Can be specified as a WKT, proj.4 or EPSG string. [Default: none]
filename

I3S file stored remotely. These must be prefaced with an “i3s://”.

Example remote file: pdal translate i3s://https://tiles.arcgis.com/tiles/arcgis/rest/services/AUTZEN_LiDAR/SceneServer autzen.las

This specifies the number of threads that you would like to use while reading. The default number of threads to be used is 8. This affects the speed at which files are fetched and added to the PDAL view.

Example: --readers.i3s.threads=64

bounds

The bounds refers to the extents of the resource in X, Y, Z coordinates with the Z dimension being optional. This must be input as a string.

Example:readers.i3s.bounds="([xmin,xmax],[ymin,ymax],[zmin,zmax])"

dimensions

Comma-separated list of dimensions that should be read. Specify the Esri name, rather than the PDAL dimension name.

Esri Pdal
INTENSITY Intensity
CLASS_CODE ClassFlags
FLAGS Flag
RETURNS NumberOfReturns
USER_DATA UserData
POINT_SRC_ID PointSourceId
GPS_TIME GpsTime
SCAN_ANGLE ScanAngleRank
RGB Red

Example: --readers.i3s.dimensions="returns, rgb"

min_density and max_density

This is the range of density of the points in the nodes that will be selected during the read. The density of a node is calculated by the vertex count divided by the effective area of the node. Nodes do not have a uniform density acrossdepths in the tree, so some sections may be more or less dense than others. The default values for these parameters will pull all the leaf nodes (the highest resolution).

Example: --readers.i3s.min_density=2 --readers.i3s.max_density=2.5