Feature Representation

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

Attribute Name Contents
e57_type This will always be e57_point_cloud.
e57_creation_datetime Date and time that the file was created.
e57_creation_datetime_isatomicclockreferenced This attribute will be present with a value of 1 if, and only if, the time stored in e57_creation_datetime is obtained from an atomic clock time source. Shall be either 0 or 1.
e57_extensions{}.prefix A list of extension prefixes.
e57_extensions{}.uri A list of the URI for each extension.
e57_format_name

Name of the format. Shall contain the string "ASTM E57 3D Imaging Data File".

This is a reader attribute.

e57_guid A globally unique identification (GUID) String for the current version of the file.
e57_library_version The version identifier for the E57 file format library that wrote the file.
e57_geometry_index The index of this point cloud or raster in the file.
e57_version_major

The major version number of the file format.

This is a reader attribute.

e57_version_minor

The minor version number of the file format.

This is a reader attribute.

This format adds the following format-specific traits for point cloud geometries.

Trait Name Contents
e57_acquisition_start The start date and time that the data was acquired.
e57_acquisition_start_isatomicclockreferenced This attribute will be present with a value of 1 if, and only if, the time stored in e57_acquisition_start is obtained from an atomic clock time source. Shall be either 0 or 1.
e57_acquisition_end The end date and time that the data was acquired.
e57_acquisition_end_isatomicclockreferenced This attribute will be present with a value of 1 if, and only if, the time stored in e57_acquisition_end is obtained from an atomic clock time source. Shall be either 0 or 1.
e57_atmospheric_pressure The atmospheric pressure, measured at the sensor, at the time of data collection (in Pascals).
e57_description A description of the point cloud.
e57_guid A globally unique identifier for the current version of the point cloud.
e57_original_guids{} A list of of globally unique identifiers identifying the data set (or sets) from which the points in this point cloud originated.
   
e57_relative_humidity The percentage relative humidity, measured at the sensor, at the time of data collection.
e57_sensor_hardware_version The version identifier for the sensor hardware at the time of data collection.
e57_sensor_model The model name or number for the sensor used to collect the points in this point cloud.
e57_sensor_serial_number The serial number for the sensor used to collect the points in this point cloud.
e57_sensor_software_version The version identifier for the software used for the data collection.
e57_sensor_vendor The name of the manufacturer for the sensor used to collect the points in this point cloud.
e57_temperature The ambient temperature, measured at the sensor, at the time of data collection (in degrees Celsius).

This format adds the following format-specific traits for raster geometries.

Trait Name Contents
e57_acquisition_datetime The date and time that the image was acquired.
e57_acquisition_datetime_isatomicclockreferenced This attribute will be present with a value of 1 if, and only if, the time stored in e57_acquisition_datetime is obtained from an atomic clock time source. Shall be either 0 or 1.
e57_associated_pointcloud_guid The globally unique identifier for the point cloud object that was being acquired when the picture was taken.
e57_description A user-defined description for the image.
   
e57_image_representation The representation of the image. Values are visualReferenceRepresentation, pinholeRepresentation, sphericalRepresentation, and cylindricalRepresentation.
e57_raster_format The underlying format in which the raster is stored. Either PNGRASTER or JPEG.
e57_rotation_w The scalar part of the rotation quaternion.
e57_rotation_x The i coefficient of the rotation quaternion.
e57_rotation_y The j coefficient of the rotation quaternion.
e57_rotation_z The k coefficient of the rotation quaternion.
e57_sensor_model The model name or number for the sensor.
e57_sensor_serial_number The serial number for the sensor.
e57_sensor_vendor The name of the manufacturer for the sensor used to collect the image.
e57_separate_image_mask Whether the image mask (alpha band) is stored in a separate blob from the data.

This format adds the following format-specific traits for raster geometries with an image representation of pinholeRepresentation:

Trait Name Contents
e57_focal_length The camera’s focal length (in meters).
e57_pixel_height The height of the pixels in the camera (in meters).
e57_pixel_width The width of the pixels in the camera (in meters).
e57_principal_point_x The X coordinate in the image of the principal point, (in pixels). The principal point is the intersection of the z axis of the camera.
e57_principal_point_y The Y coordinate in the image of the principal point (in pixels).

This format adds the following format-specific traits for raster geometries with an image representation of sphericalRepresentation:

Trait Name Contents
e57_pixel_height The width of a pixel in the image (in radians).
e57_pixel_width The height of a pixel in the image (in radians).

This format adds the following format-specific traits for raster geometries with an image representation of cylindricalRepresentation:

Trait Name Contents
e57_pixel_height The height of a pixel in the image (in meters).
e57_pixel_width The width of a pixel in the image (in radians).
e57_principal_point_y The Y coordinate in the image of the principal point (in pixels). This is the intersection of the z = 0 plane with the image.
e57_radius The closest distance from the cylindrical image surface to the center of projection (that is, the radius of the cylinder) (in meters).