target_method_character.md
In prioritizr: Systematic Conservation Prioritization in R

The following character values can be used to specify target setting methods: "jung" (per Jung et al. 2021), "polak" (per Polak et al. 2016), "rodrigues" (per Rodrigues et al. 2004), "ward" (per Ward et al. 2025), and "watson" (per Watson et al. 2010). (2010). Additionally, the following values can be used to set targets based on criteria from the IUCN Red List of Threatened Species (IUCN 2025): "rl_species_VU_A1_B1" "rl_species_EN_A1_B1", "rl_species_CR_A1_B1", "rl_species_VU_A1_B2" "rl_species_EN_A1_B2", "rl_species_CR_A1_B2", "rl_species_VU_A2_B1" "rl_species_EN_A2_B1", "rl_species_CR_A2_B1", "rl_species_VU_A2_B2" "rl_species_EN_A2_B2", "rl_species_CR_A2_B2", "rl_species_VU_A3_B1" "rl_species_EN_A3_B1", "rl_species_CR_A3_B1", "rl_species_VU_A3_B2" "rl_species_EN_A3_B2", "rl_species_CR_A3_B2", "rl_species_VU_A4_B1" "rl_species_EN_A4_B1", "rl_species_CR_A4_B1", "rl_species_VU_A4_B2" "rl_species_EN_A4_B2", and "rl_species_CR_A4_B2". Furthermore, the following values can be used to set targets based on criteria from the IUCN Red List of Ecosystems (IUCN 2024): "rl_ecosystem_VU_A1_B1", "rl_ecosystem_EN_A1_B1", "rl_ecosystem_CR_A1_B1", "rl_ecosystem_VU_A1_B2", "rl_ecosystem_EN_A1_B2", "rl_ecosystem_CR_A1_B2", "rl_ecosystem_VU_a2a_B1", "rl_ecosystem_EN_a2a_B1", "rl_ecosystem_CR_a2a_B1", "rl_ecosystem_VU_a2a_B2", "rl_ecosystem_EN_a2a_B2", "rl_ecosystem_CR_a2a_B2", "rl_ecosystem_VU_a2b_B1", "rl_ecosystem_EN_a2b_B1", "rl_ecosystem_CR_a2b_B1", "rl_ecosystem_VU_a2b_B2", "rl_ecosystem_EN_a2b_B2", "rl_ecosystem_CR_a2b_B2", "rl_ecosystem_VU_A3_B1", "rl_ecosystem_EN_A3_B1", "rl_ecosystem_CR_A3_B1", "rl_ecosystem_VU_A3_B2", "rl_ecosystem_EN_A3_B2", and "rl_ecosystem_CR_A3_B2".' For convenience, these options can also be specified with lower case letters (e.g., "rl_species_VU_A1_B1" may alternatively be specified as "rl_species_vu_a1_b1"). Note that target setting methods that require additional data or parameters cannot be specified with character values.