photocounts: Aerial photograph and field counts of dead trees.

In trobinj/trtools: Miscellaneous Tools for Teaching Statistics

Aerial photograph and field counts of dead trees.

Description

Counts of dead trees using aerial photographs and field counts in a 80ha parcel of land divided into 80 units. Field counts are more costly but also more accurate than those based on aerial photographs.

Usage

photocounts

Format

A data frame with 80 observations and two variables:

photo

count of dead trees from aerial photograph

field

count of dead trees from the field

Source

Barrett, J. P. & Nutt, M. E. (1979). Survey sampling in the environmental sciences: A computer approach. Wentworth, NH: COMPress, Inc.

Gregoire, T. G. & Valentine, H. T. (2007). Sampling strategies for natural resources and the environment. Boca Raton, FL: Chapman & Hall/CRC.

trobinj/trtools documentation built on Jan. 28, 2024, 3:20 a.m.