Sierra Leone administrative level 0-4 boundaries (COD-AB) dataset. NOTE: This COD-AB was updated in December 2023 to reflect the five-ADM1 features administrative structure. This COD-AB was most recently reviewed for accuracy and necessary changes in 2023. Sourced from Government of Sierra Leone Vetting and live geoservices provision by Information Technology Outreach Services (ITOS) with funding from USAID. This COD-AB is suitable for database or GIS linkage to the Sierra Leone COD-PS using the ADM0_PCODE, ADM1_PCODE, etc. fields. An edge-matched (COD-EM) version of this COD-AB is available. Administrative level 1 contains 4 features. Administrative level 2 contains 14 features. Administrative level 3 contains 167 features. Administrative level 4 contains 1316 features.