Title

Cobden - DEM 

Time period

2016-05-072016-05-07 

Horizontal Accuracy

0.3m  

Vertical Accuracy

0.1m  

Code

MGA Zone 54 GDA94 

Title

ESRI Ascii 

Topic category

• Elevation

Use limitation

General 

Classification

Unclassified  

Description

ArcGIS 9.2 Terrain Grids were derived using the Natural Neighbor interpolation. This method uses the closest triangles and applies weights to the proportionate areas from the grid cell centroid to interpolate the value. It uses known elevation data, it does not make any predictions regarding the surface and accurately depicts existing troughs and peaks in the data and supports irregular point spacing, which suits the nature of LiDAR data. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

The DEMs are consistent with respect to their visual representation of the ground features, continuity at the tile boundaries and representation of elevation values. The definition of the ground under trees may be less accurate. Accuracy estimates for terrain modelling refer to the terrain definition on clear ground. 

Missing Data

Comments

The DEM is complete for the defined project extent. Holes may exist in the dataset where there were insufficient laser strikes to produce a surface (eg. ocean, large water bodies). Such areas have been coded with a 'no data' value of 9999. 

Excess Data

Platform Type

Aerial  

Assembly

Single  

Tile Size

2 km  

Raster Type

DEM  

X Pixel Resolution (cm)

1cm  

Y Pixel Resolution (cm)

1cm  

Seamlessness

Full  

Number of Bands

1 

Band List

1  

Resampling Kernel

Nearest Neighbour  

Rectification Type

Orthorectified  

Platform Name

Fixed Wing Aircraft  

DEM Creator

Supplier