Title

Vertical Accuracy 50cm - Contour 

Time period

2008-01-142008-03-23 

Horizontal Accuracy

0.5m  

Vertical Accuracy

1.25m  

Code

MGA Zone 54 GDA94 

Title

Shapefile, MapInfo TAB 

Topic category

• Elevation

Use limitation

General 

Classification

Unclassified  

Description

All contour generation was carried using Intergraph Microstation software. The contours are created by referencing the all ground LiDAR strikes. A number of macros are applied to the all ground strikes before contour generation. These macros basically thin and smooth the LiDAR ground strikes. Contours are then generated automatically from the smoothed LiDAR strikes. Contours are derived by interpolation of a surface model generated from LiDAR ground points using process parameters optimised to suit the terrain. The contours are then checked using any available imagery as a backdrop and line work cleaned where required. Final macros are applied to the contour line work which check for dangles, loops, spikes etc. At the final stage we use FME software to convert the Microstation design files to ESRI Shape and MapInfo TAB files. 

Classification

Unclassified  

Attribute Quality

Positional Accuracy

Conceptual Consistency

Comments

The contours are consistent with respect to contour interval, smoothness, cartographic display and elevation attribution. 

Missing Data

Comments

The extent of the contours supplied are complete for the defined project extents. 

Excess Data

Platform Type

Aerial  

Assembly

Single  

Tile Size

5 km  

Contour Interval

2.5m