The contours were created by first digitising the 1902 survey by Murray & Pullar. I'm fortunate to own a copy, but it can be viewed freely online
. Digitising, TIN interpolation, contour creation / smoothing were
all performed in QGIS
. Spatial data is stored in PostGIS
and served and styled by GeoServer
and OpenLayers 3
Lake outlines are from the UK Lakes Portal
, which contains OS data © Crown copyright and database right (2016).