The directives listed below are processed by the LAS writer. The suffixes shown are prefixed by the current <WriterKeyword> in a mapping file. By default, the <WriterKeyword> for the LAS writer is LAS.
DATASET
Required/Optional
Required
Mapping File Syntax
LAS_DATASET /usr/data/
Workbench Parameter
Destination ASPRS LAS Folder
VERSION
Required/Optional
Optional
Values
1.0 | 1.1 | 1.2 (default) | 1.3 | 1.4-legacy-compatible | 1.4
Mapping File Syntax
LAS_DATASET VERSION 1.1
Workbench Parameter
ASPRS LAS Version
ARCGIS_LAS_DATASET
Note: This directive applies to machines using the Windows operating system.
To use this directive, you must install and license both ArcGIS 10.1 (or newer) and the 3D Analyst extension.
This directive identifies the name of the Esri ArcGIS LAS dataset file to create. If specified, the writer will produce one .lasd file that references all the LAS files created by the FME LAS writer during the translation.
An .lasd file is required to work with LAS files in the Esri ArcGIS environment. By default, the .lasd file will be written to the same folder as the .las files to which it refers. To write the .lasd to a different folder, use a fully qualified path.
Note that this option is currently incompatible with compression. When writing compressed LAS files, an .lasd file will not be generated.
Required/Optional
Optional
Values
<filename of the .lasd to create>
Mapping File Syntax
LAS_ARCGIS_LAS_DATASET terrain.lasd
Workbench Parameter
ArcGIS LAS Dataset (.lasd)
COMPUTE_STATISTICS_ON_ARCGIS_LAS_DATASET
This directive is applicable when an ArcGIS LAS Dataset is written. It determines whether to calculate statistics for the LAS files referenced by the ArcGIS LAS Dataset.
Required/Optional
Optional
Values
Yes | No (default)
Mapping File Syntax
LAS_COMPUTE_STATISTICS_ON_ARCGIS_LAS_DATASET Yes
Workbench Parameter
Compute Statistics on ArcGIS LAS Dataset
USE_RELATIVE_PATHS_IN_ARCGIS_LAS_DATASET
This directive is applicable when an ArcGIS LAS Dataset is written. It determines whether the references to the LAS files within the ArcGIS LAS Dataset are stored using relative or absolute path names.
Use relative paths when the LAS files referenced by the ArcGIS LAS Dataset will be moved from their original location (for example, moved to a server).
Required/Optional
Optional
Values
Yes (default) | No
Mapping File Syntax
LAS_USE_RELATIVE_PATHS_IN_ARCGIS_LAS_DATASET No
Workbench Parameter
Use Relative Paths in ArcGIS LAS Dataset
COMPRESSION
Required/Optional
Optional
Values
LAZ | zLAS | None (default)
Mapping File Syntax
LAS_COMPRESSION LAZ
Workbench Parameter
Compression
RESCALE_COORDINATES
The LAS format stores coordinates as int32 values with a scale and offset factor.
Since FME stores coordinates as real64 values, there is no guarantee that LAS will be able to store the coordinate data as is.
To resolve this, the LAS writer will rescale coordinates to span the int32 range (-2147483647 to 2147483647) and calculate a new scale and offset factor to preserve the original coordinate values as closely as possible. However, this rescaling may slightly distort some coordinates if they were already safely storable as int32. To disable this rescaling, set this option to No.
Required/Optional
Optional
Values
Yes (default) | No
Mapping File Syntax
RESCALE_COORDINATES YES
Workbench Parameter
Re-scale Coordinates
USER_COMPONENTS
Required/Optional
Optional
Mapping File Syntax
USER_COMPONENTS my_component_1,my_component_2,my_list_component{}
Workbench Parameter
User Components
ZLAS_REARRANGE_POINTS
Required/Optional
Optional
Mapping File Syntax
ZLAS_REARRANGE_POINTS Yes
Workbench Parameter
Rearrange Points for zLAS Compression
ZLAS_POINT_SPACING_SOURCE
Required/Optional
Optional
Mapping File Syntax
ZLAS_POINT_SPACING_SOURCE scan
Workbench Parameter
zLAS Point Spacing Source
ZLAS_POINT_SPACING_VALUE
Required/Optional
Optional
Mapping File Syntax
ZLAS_POINT_SPACING_VALUE 1.0
Workbench Parameter
zLAS Point Spacing Value