# readers.slpk

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.

    [
        {
            "type": "readers.slpk",
            "filename": "PDAL/test/data/i3s/SMALL_AUTZEN_LAS_All.slpk",
            "obb": {
                "center": [
                    636590,
                    849216,
                    460
                ],
                "halfSize": [
                    590,
                    281,
                    60
                ],
                "quaternion":
                [
                    0,
                    0,
                    0,
                    1
                ]
            }
        }
    ]

    pdal traslate  PDAL/test/data/i3s/SMALL_AUTZEN_LAS_All.slpk autzen.las

## 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]

override_srs

  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. Can’t use with ‘default_srs’ [Default: none]

default_srs

  Spatial reference to apply to the data if the input does not specify one. Can be specified as a WKT, proj.4 or EPSG string. Can’t use with ‘override_srs’ [Default: none]

obb

  An oriented bounding box used to filter the data being retrieved. The obb is specified as JSON exactly as described by the I3S specification.

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 across depths 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`