Supplement 1. C++ program containing the algorithms to survey a square distribution and output results (presences/absences) formatted for autologistic regression with covariates.

File List
READMEcode.txt
-- Description of the Surveys
program.

Surveys.c
-- C++ source code.

Surveys.zip
-- Contains both described
files plus the compiled program.

Description
READMEcode.txt is
a text file containing a description of the Surveys program.

Surveys(.c and
.exe) is a C++ program that
can be used to survey a known distribution (0 = absence, 1 = presence)
on a square grid (currently set for 50 × 50) and create presence/absence
sample data (in the form of an effort.g
and response.y file) formatted
for autologistic regression. Factors that can be changed are grid location
(by x,y coordinates), grid size (number of cells), cell size,
number of classes in a categorical variable, and the factors tested in this
study: survey design (and associated parameters), species distribution (contiguity
level), detection probability, and sample size. Tests of environmental data
error effects were completed by modifying covariate data after a hypothetical
distribution map was created. Run Surveys.exe
without any arguments for argument order and detailed information.