ASPRS LiDAR Data Exchange Format (LAS) Feature Representation

In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format also adds format-specific attributes (Format Attributes).

Attribute Name

Contents

las_type This will always be las_point_cloud.
las_file_creation_date The date on which this file was created (LAS 1.1 and 1.2), or the date on which the data was collected (LAS 1.0).
las_file_source_id The file source ID. A value of zero is interpreted to mean that an ID has not been assigned.
las_generating_software Description of the generating software.
las_gps_time_type Specifies the meaning of GPS Time in the Point Records. Only present in LAS 1.2 or later. A value of 0 indicates that GPS time in the point record fields is GPS Week Time (the same as previous versions of LAS). A value of 1 indicates that GPS Time is standard GPS Time (satellite GPS Time) minus 1 x 109. The offset moves the time back to near zero to improve floating point resolution.
las_project_id A complete Globally Unique Identifier to serve as a project ID. By assigning a Project ID and using a File Source ID (defined above) every file within a project and every point within a file can be uniquely identified, globally.
las_synthetic_returns Specifies whether return numbers have been synthetically generated.
las_system_identifier A string identifying the hardware system or operation that generated the data.
las_version The version of the LAS file.
las_vertical_coordsys_code The GeoTIFF code identifying the vertical coordinate system.
las_vertical_datum_code The GeoTIFF code identifying the vertical datum.
las_vertical_units_code The GeoTIFF code identifying the units of the vertical coordinate system.
las_zlas_rearranged_points Specifies whether points were rearranged when applying zLAS compression.