Title

Surf Coast DEM 

Time period

2020-11-252020-11-25 

Horizontal Accuracy

0.3m  

Vertical Accuracy

0.1m  

Code

MGA Zone 55 GDA2020 

Title

ESRI Ascii 

Topic category

• Elevation

Use limitation

General 

Classification

Unclassified  

Description

Point Classification was undertaken using automated macros and manual changes, especially in built up areas. This data was then checked using a specialised QA environment. A vertical adjustment of -0.1368 has been applied to the data to fit it to control. DEM and DSM were generated using LAStools. DEM was generated from ground and model key points using a triangulated interpolation surface. Hydro flattening was performed on the DEM using a semi-automated method of applying the minimum DEM height within data void regions from a 1m grid generated from all LiDAR returns excluding those classified as water. Contours were generated on a ground-only cloud thinned using a specialised methodology to ensure no bowties or crossovers. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

3 band photography meets expected band naming and combination specifications. Elevation products meet expected data standards. 

Missing Data

Comments

Complete photography coverage over Surf Coast Shire. LiDAR-derived DEM and Contour coverage over Anglesea Landfill and Torquay-Jan Juc 

Excess Data

Platform Type

Aerial  

Assembly

Single  

Tile Size

0.5 km  

Raster Type

Digital Height Model  

X Pixel Resolution (cm)

1cm  

Y Pixel Resolution (cm)

1cm  

Seamlessness

Full  

Number of Bands

1 

Band List

1  

Resampling Kernel

Not Entered  

Rectification Type

Orthorectified  

Platform Name

Fixed Wing Aircraft