Wimmera CMA - Fractional Cover Count

dataset
Dataset: Wimmera CMA - Fractional Cover Count Assembly: Single
 
Citation proposal Citation proposal

Wimmera CMA - Fractional Cover Count

Description

Title
Wimmera CMA - Fractional Cover Count 
 
 

Temporal

Time period
2010-01-052010-10-20 
 
 

Spatial

Horizontal Accuracy
0.3m 
Vertical Accuracy
0.2m 
Code
MGA Zone 54 GDA94 
 
 

Format

Title
ESRI Ascii 
 
 

Contacts

  Point of contact

  Custodian

 
 

Keywords

Topic category
  • Elevation
 
 

Constraints

Use limitation
Departmental 
Classification
Limited Distribution 
 
 

Lineage

Description
The Fractional Cover Count (FCC) measures the density of vegetation in a particular area. Generically, this is expressed as the number of LiDAR points classified as vegetation as a percentage of all LiDAR points for the particular area. FCC is computed for each 2x2m cell within 300m either side of the ISC river centre lines. Two types of FCC datasets have been calculated: Height Interval FCCs (used in the Structure 1 and 2 metrics) and Overall FCC (used in the Fragmentation, Vegetation Overhang and Vegetation Width metrics). An Interval FCC dataset has been calculated for each of the following six Height Class Intervals: 1.5-5m, 5-10m, 10-15m, 15-20m, 20-25m, 25+m using the following formula: Height Interval FCC = (Number of Vegetation points in Height Class) / (Total Number of Vegetation points above 1.5m). A single Overall FCC is calculated using the following formula: Overall FCC = (Total number of Vegetation points above 1.5m) / (Total number of Vegetation points above 1.5m + Total number of Ground points). In total, there are seven FCC raster datasets calculated. In 2014 a second project was undertaken to produce FCC datasets for the following height classes (1.5-2m, 2-3.5m, 3.5-5m) using the same formula and methodology. 
 
 

Metadata Constraints Metadata Constraints

Classification
Unclassified 
 
 

Quality

Attribute Quality
Positional Accuracy
Conceptual Consistency
Comments
The Fractional Cover Count values are expressed in decimal percentage and are continuous, floating point values between 0 and 1. 
 
Missing Data
Comments
The Fractional Cover Count datasets have been created to an extent 300m either side of the river centreline. 
 
Excess Data
 
 

Acquisition Info

Platform Type
Aerial 
Assembly
Single 
Tile Size
1 km 
 
 

Raster Data Details

Raster Type
Fractional Cover Count 
X Pixel Resolution (cm)
2cm 
Y Pixel Resolution (cm)
2cm 
Seamlessness
Not Entered 
Number of Bands
1 
Band List
1 
Resampling Kernel
Not Entered 
Rectification Type
Orthorectified 
Platform Name
Fixed Wing Aircraft 
 
 

Survey Details

Sensor

Title
Leica ALS50-II 
Identifier
Aerial

Type
LIDAR 
 

Aerial Survey Details

Runs
397 
Run Orientation
Not Entered 
Swath Width
992 
Side Overlap
20 
Flying Height Unit
agl metre 
Flight Height
1022 
 
 


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