Title

LiDAR Point Cloud 

Time period

2014-11-122015-01-16 

Horizontal Accuracy

0.18m  

Vertical Accuracy

0.1m  

Code

MGA Zone 55 GDA94 

Title

LAS 1.2 Classification Level 2 

Topic category

• Elevation

Use limitation

General 

Classification

Unclassified  

Description

LiDAR data was captured using onboard GPS, IMU and a network of ground base stations. Trajectories and laser data was corrected initially using AusGEOID09 and then adjusted to AHD using local PSM's. LiDAR data is classified into multiple ground and non-ground classes using standard classification algorithims. Water was identified based primarily on laser intensity but also by at the laser data in profile. These points were then manually reclassified from ground to water. Default points represent laser returns considered to be noise returns, ie points above ground but below 0.10m. The Vegetation Class were classifed through auto classification algorithims and seperated into three classes Low (0.10 - 0.30m), Med ( 0.30m-2m) and High (+2m). Buildings were automatically classifed from the High Veg Class, and bridges were manually identified and classified. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

All classification codes used are complete and valid. The definition of the ground under trees may be less accurate. 

Missing Data

Comments

The LiDAR datasets representing various ground and non-ground features are complete for the defined project extents. The vegetation classification codes may include non-ground classified points like, cars, fences tanks, powerlines, small sheds etc. 

Excess Data

Platform Type

Aerial  

Assembly

Single  

Tile Size

1 km  

Pulse Mode

Single 

Scan Rate (Hz)

34Hz  

Scan Frequency (kHz)

70kHz  

Scan Angle (degrees)

25degrees  

Footprint Size (m)

0.33000001m  

Point Density Actual (pts/m2)

1points/m2  

Point Spacing Actual (pts/m)

1points/m2  

Ellipsoid Provided

0 

Geoid Vertical Datum

AUSGEOID09  

Class Level

2 

Classification

Class Level	Class 0 - Unclassified	Class 1 - Default	Class 2 - Ground	Class 3 - Low Vegetation	Class 4 - Medium Vegetation	Class 5 - High Vegetation	Class 6 - Buildings/Structures	Class 7 - Low/High Points	Class 8 - Model Key Points	Class 9- Water	Class 10 - Bridge	Class 12 - Flightline Overlap Points
2	0	1	1	1	1	1	1	1	1	1	1	1