Title

Geelong - DSM 

Time period

2012-02-062012-03-09 

Horizontal Accuracy

0.2m  

Vertical Accuracy

0.2m  

Code

MGA Zone 55 GDA94 

Title

ESRI Ascii 

Topic category

• Elevation

Use limitation

General 

Classification

Unclassified  

Description

The 1m DSM Grids were derived using the Natural Neighbour interpolation using the first returned height value. 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 LiDAR data. Grids were then translated to ESRI ASCII formats using custom ArcGIS and Feature Manipulation Engine (FME) macros. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

The data is consistent with respect to the visual representation of ground and non-ground features, continuity at the tile boundaries and representation of elevation values. 

Missing Data

Comments

The data is complete for the defined project extent. 

Excess Data

Platform Type

Aerial  

Assembly

Single  

Tile Size

2 km  

Raster Type

Digital Surface Model  

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