Calculates a Natural Capital Assets Index // Calculates a regional natural capital assets index (NCAI) following the methodology designed by NatureScot for Scotland as described in Albon, Balana, Brooker Eastwood (2014) https://www.nature.scot/sites/default/files/2025-06/naturescot- commissioned-report-751.pdf and McKenna et al. (2019) doi:10.1016/J.ECOLIND.2019.105645. Processes habitat extent and condition data alongside metadata and weighting systems to produce a yearly single figure indexed relative to a base-year value of 100.