Topic category

• Elevation

Use limitation

Departmental 

Classification

Limited Distribution  

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. 

Classification

Unclassified  

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

Platform Type

Aerial  

Assembly

Single  

Tile Size

1 km  

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