Are you able to provide a single file in .shp or .dwg format with height contours for the entire site (HGH1, HGH2 and HGH3), preferably to a 5 m resolution. If not, then we can reuse the same contours which we used in our previous assessment of the site. This included a 20 m vertical resolution contour file provided by EA which only mapped a range of hills 10 km west of Hua Sai village. For the rest of the site, we manually estimated and defined height contours to indicate the increase in ground height from sea level.