Title

Corryong Nariel Creek LIDAR 

 

Time period

2014-04-242014-04-25 

 

Horizontal Accuracy

0.25m  

Vertical Accuracy

0.13m  

Code

MGA Zone 55 GDA94 

 

 

Title

LAS 1.2 Classification Level 2 

 

 

Topic category

• Elevation

 

Use limitation

General 

Classification

Unclassified  

 

 

Classification

Unclassified  

 

Attribute Quality

Positional Accuracy

Conceptual Consistency

Missing Data

Comments

Ground Classifications Fugro Spatial Solutions Pty Ltd aim is to select those points that are part of a clean ground surface, which might not be 100% of the ground hits. This results in a cleaner dataset, without compromising on terrain detail and accuracy. Ground filtering algorithms, tailored for this project, data type and terrain type, are applied to the full dataset. The ground filtered dataset is then visually checked by an operator, and incorrectly classified data is corrected or the ground filtering algorithm is adjusted and then visually checked. For the verification of the ground classifications, intensity imagery is used as a backdrop image. This dataset is classified to ICSM Level 2 standard. Ground Surface Gridded DEM A 1m gridded DEM has been generated from the Lidar class 2 ground only. The method of deriving the height for each grid point is by triangulation between the three nearest lidar ground points. Note: Returns on water have been removed from the (classified) point clouds. Gridded datasets have been interpolated across voids (up to 500m in diameter) caused by either no-return due to water bodies, or removal of buildings, vegetation or other above ground features. The tiled data has been cut into 1km tiles, where the file name prefix corresponds with the Lower Left coordinate of the block. Some of the tiled data has been cut into 2km tiles, where the file name prefix corresponds with the Lower Left coordinate of the block. 

Excess Data

 

Platform Type

Aerial  

Assembly

Mosaic  

Tile Size

1 km  

 

 

Pulse Mode

multi 

Scan Rate (Hz)

131500Hz  

Scan Frequency (kHz)

0kHz  

Scan Angle (degrees)

26degrees  

Footprint Size (m)

0.44999999m  

Point Density Target (pts/m2)

1points/m2  

Point Density Actual (pts/m2)

1points/m2  

Point Spacing Target (pts/m)

0.47999999points/m2  

Point Spacing Actual (pts/m)

1points/m2  

Ellipsoid Provided

1 

Ellipsoid Vertical Datum

GRS80 Ellipsoidal (ITRF2005)  

Ellipsoid Format

LAS 1.2 Classification Level 2  

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	0	1	1	1	1	1	1	0	1	1	1