unmarked (version 0.11-0)

cruz: Landscape data for Santa Cruz Island

Description

Spatially-referenced elevation, forest cover, and vegetation data for Santa Cruz Island.

Usage

data(cruz)

Format

A data frame with 2787 observations on the following 5 variables.

x

Easting (meters)

y

Northing (meters)

elevation

a numeric vector, meters

forest

a numeric vector, proportion cover

chaparral

a numeric vector, proportion cover

Source

Brian Cohen of the Nature Conservancy helped prepare the data

Details

The resolution is 300x300 meters.

The Coordinate system is EPSG number 26911

NAD_1983_UTM_Zone_11N Projection: Transverse_Mercator False_Easting: 500000.000000 False_Northing: 0.000000 Central_Meridian: -117.000000 Scale_Factor: 0.999600 Latitude_Of_Origin: 0.000000 Linear Unit: Meter GCS_North_American_1983 Datum: D_North_American_1983

References

Sillett, S. and Chandler, R.B. and Royle, J.A. and Kery, M. and Morrison, S.A. In Press. Hierarchical distance sampling models to estimate population size and habitat-specific abundance of an island endemic. Ecological Applications

Examples

data(cruz)
str(cruz)

levelplot(elevation ~ x + y, cruz, aspect="iso",
    col.regions=terrain.colors(100))

if(require(raster)) {
elev <- rasterFromXYZ(cruz[,1:3],
     crs="+proj=utm +zone=11 +ellps=GRS80 +datum=NAD83 +units=m +no_defs")
elev
plot(elev)
}