Overview
Use the United States Geological Survey's (USGS) National Land Cover Database (NLCD) land-cover data to determine areas suitable for helicopter landing zones (HLZ) in the United States. Input NLCD categories are remapped into Acceptable and Acceptable With Caution categories.
Notes
The following NLCD classes are used. All other values are removed as unacceptable.
| Value | Description | Condition |
|---|---|---|
12 | Perennial Ice/Snow | Acceptable |
31 | Barren Land (Rock/Sand/Clay) | Acceptable |
51 | Scrub | Acceptable |
71 | Grassland/Herbaceous | Acceptable |
81 | Pasture/Hay | Acceptable |
21 | Low Intensity Residential | Acceptable With Caution |
52 | Shrub/Scrub | Acceptable With Caution |
82 | Cultivated Crops | Acceptable With Caution |
For more information about the NLCD, see the USGS National Land Cover Database page.
Parameters
| Parameter | Description |
|---|---|
Raster (Required) | The input NLCD raster. |
Clipping Geometry / Raster (Required) | Specify the extent using a polygon feature, or x and y minimum and maximum coordinates. |