“…In order to identify the links among archaeological settlement placement, human adaptive systems, and the ecological niches exploited by prehistoric populations during the Eneolithic, a geodatabase was created using Esri ArcGIS 10.6 based on field surveys-only in Romania (Mihu-Pintilie and Nicu, 2019), along with relevant archaeological documentation and registries-for the entire study area (Harper et al, 2019). We only used the CTU settlements where independent archaeological documentation was well-grounded in reports, scientific publications (e.g., articles, supplementary material, and data in journal articles), radiocarbon-based chronology, and georeferenced archeological maps (Nikitin et al, 2010;Diachenko and Menotti, 2012;Brigan andWeller, 2013, 2018;Chapman et al, 2014;Chapman et al, 2019;Harper et al, 2019;Mihu-Pintilie and Nicu, 2019). The main source for CTU sites located outside the Romanian territory was the Eastern European Neo-Eneolithic Sites Repository (EENSR) version 1.0 database, published for the first time by Harper et al (2019), which contains information about more than 8,000 Neo-Eneolithic sites.…”