cruz: Landscape data for Santa Cruz Island

Description Usage Format Details Source References Examples

Description

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

Usage

1

Format

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

x

Easting (meters)

y

Northing (meters)

elevation

a numeric vector, FEET (multiply by 0.3048 to convert to meters)

forest

a numeric vector, proportion cover

chaparral

a numeric vector, proportion cover

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

Source

Brian Cohen of the Nature Conservancy helped prepare the data

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

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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)
}

unmarked documentation built on May 27, 2021, 5:07 p.m.