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message: 'To cite package "fieldopt" in publications use:'
type: software
license: GPL-3.0-or-later
title: 'fieldopt: Area-Frame and Dual-Frame Survey Design under Real Field Cost'
version: 0.1.0.9001
doi: 10.32614/CRAN.package.fieldopt
abstract: Design of agricultural and other area-frame and dual-frame (area plus list)
  sample surveys that go to the field, with the real cost of field work (travel between
  sampling units plus interviews) next to the variance of the design-based estimator.
  Travel matrices from coordinates or a road network; GRASP routing of the field work
  for one or several teams; stratified spatially balanced (local pivotal) or spatially
  ordered systematic selection of segments with interpenetrating replicates; points
  inside segments with multiplicity (expected-hits) estimation; closed, open and weighted
  segment estimators; Horvitz-Thompson estimation with local-mean or replicate variances;
  cost-aware allocation across strata, Hartley's dual-frame allocation with an overlap,
  and two-stage allocation with a cost function; and the cost-variance frontier of
  a design by simulation. The computational engine is the Rust crate 'fieldopt-core'.
  The methods follow Grafström, Lundström and Schelin (2012) <https://doi.org/10.1111/j.1541-0420.2011.01699.x>
  for the local pivotal method, Grafström and Schelin (2014) <https://doi.org/10.1111/sjos.12016>
  for the local-mean variance, Hartley (1962) for the dual-frame design, and Beardwood,
  Halton and Hammersley (1959) <https://doi.org/10.1017/S0305004100034095> for the
  square-root law of travel behind the cost curve.
authors:
- family-names: Leite
  given-names: André
  email: leite@castlab.org
  orcid: https://orcid.org/0000-0002-4718-9766
- family-names: Ospina
  given-names: Raydonal
  email: raydonal@castlab.org
  orcid: https://orcid.org/0000-0002-9884-9090
- family-names: Ferraz
  given-names: Cristiano
  email: cferraz@castlab.org
  orcid: https://orcid.org/0000-0002-6838-6734
repository: https://castlaboratory.r-universe.dev
repository-code: https://github.com/castlaboratory/fieldopt
commit: 115376dac3d6d0f2ddbcc65deac40444925eff5c
url: https://castlaboratory.github.io/fieldopt/
date-released: '2026-10-22'
contact:
- family-names: Leite
  given-names: André
  email: leite@castlab.org
  orcid: https://orcid.org/0000-0002-4718-9766