Title

Surf Coast DEM 

Resource Type

Dataset  

Spatial representation type

Grid  

Horizontal Accuracy

0.3m  

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