Title

NCCMA - Stage 2 Floodplains - DEM 

Time period

2011-07-312011-08-23 

Horizontal Accuracy

0.2m  

Vertical Accuracy

0.1m  

Code

MGA Zone 54 GDA94 

Title

ESRI Ascii 

Topic category

• Elevation

Use limitation

General 

Classification

Unclassified  

Description

Proprietary software was used to generate the DEM from the un-thinned classified ground returns. The solution determines the elevation of each cell by calculating the weighted average elevation of all ground returns within the cell. Gaps of one cell are assigned the mean of surrounding cells while larger gaps are interpolated by triangulation from surrounding cells. The DEM is then masked back to the area boundary and exported in tiles. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

Some stepping between swaths may be present due to turbulence at the time of capture. The definition of the ground surface under canopy may be less accurate. 

Missing Data

Comments

Some voids may be present in areas of diminished returns 

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

Not Entered  

Number of Bands

1 

Band List

1  

Resampling Kernel

Unknown  

Rectification Type

Not Entered  

Platform Name

Fixed Wing Aircraft  

DEM Creator

Supplier