Scene Layer Packages (SLPK) is a specification created by Esri as a format for their 3D Scene Layer and scene services. SLPK is a format that allows you to package all the necessary I3S files together and store them locally rather than find information through REST.

## Example¶

This example will unarchive the slpk file, store it in a temp directory, and traverse it. The data will be output to a las file. This is done through PDAL’s command line interface or through the pipeline.

{
"pipeline":[
{
"filename": "PDAL/test/data/i3s/SMALL_AUTZEN_LAS_All.slpk",
"bounds": "([-123.075542,-123.06196],[44.049719,44.06278])"
}
]
}

pdal traslate  PDAL/test/data/i3s/SMALL_AUTZEN_LAS_All.slpk \
autzen.las \
--readers.slpk.bounds="([-123.075542,-123.06196],[44.049719,44.06278])"


## Options¶

filename
SLPK file must have a file extension of .slpk. Example: pdal translate /PDAL/test/data/i3s/SMALL_AUTZEN_LAS_ALL.slpk output.las
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]
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.slpk.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.slpk.dimensions="rgb, intensity"

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. Default values for these parameters will select all leaf nodes (the highest resolution).

Example: --readers.slpk.min_density=2 --readers.slpk.max_density=2.5`