Title

Pyalong LiDAR 

 

Time period

2022-08-152022-08-15 

 

Horizontal Accuracy

0.3m  

Vertical Accuracy

0.1m  

Code

MGA Zone 55 GDA2020 

 

 

Title

LAZ 1.4 (Compressed LAS) 

 

 

Topic category

• Elevation

 

Use limitation

General 

Classification

Unclassified  

 

Description

Classified Point Cloud - AAM uses proprietary ground classification routines in TerraScan to remove any non-ground points and generate an accurate ground surface. Once the ground routine has been completed a manual quality control routine is done using aerial imagery, hill shades, cross-sections, and profiles within the TerraSolid software suite. After this QC step, a peer review and supervisor manual inspection are completed on a percentage of the classified tiles based on the project size and variability of the terrain. Concurrent imagery has been orthorectified and used to colourise the point cloud with RGB values. Overlap Point Flag - Class 12: ’Overlap’ was not used in this project. All points were classified into classes requested and flagged with the Overlap bit flag (Bit 3) in addition to being classified. Geometrically unreliable points near the extreme edge of the swath were classified into class 1, flagged with the Withheld bit flag (Bit 2) and not included in further processing. 

 

Classification

Unclassified  

 

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

ICSM Level 2+ classification was applied and the data files include RGB imagery point colourisation on all tiles. 

Missing Data

Comments

The LiDAR files are full data tiles (no null space) and the extent and coverage is common with the other datasets in this project. 

Excess Data

 

Platform Type

Aerial  

Assembly

Single  

Tile Size

1 km  

 

 

Scan Rate (Hz)

0Hz  

Scan Frequency (kHz)

0kHz  

Footprint Size (m)

0.30000001m  

Point Density Actual (pts/m2)

8points/m2  

Point Spacing Actual (pts/m)

0.34999999points/m2  

Ellipsoid Provided

1 

Ellipsoid Vertical Datum

GRS80 Ellipsoidal (ITRF2008)  

Ellipsoid Format

LAZ 1.4 (Compressed LAS)  

Geoid Vertical Datum

AUSGEOID2020  

Additional Adjustments

The survey was adjusted to State Survey Control Marks supplied by the Surveyor General of Victoria 

Environmental Conditions

LiDAR was captured under standard conditions suited for LiDAR survey with requirements for concurrent aerial photography being a secondary consideration. 

Tidal Conditions

Not Applicable to this block (or within +/- 2hrs of low tide if a coastal blocks) 

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	0	1	1	0