organisation	MLURI
user_name	David Miller
user_organisation	Macaulay Land Use Research Institute Craigiebuckler Aberdeen AB15 8QH
date	8/11/97
data_set_name	BASUK 1:50 000 raster DEM
data_date	1995
description	A raster dataset, derived from digitized contours, as mapped at 1:50 000 scale by the Ordnance Survey.
raster_vector	RASTER
filename	basuk_dem_25m.img
software	Laserscan Vtrak and LITES used in data capture. Laserscan terrain modelling software used for derivation of raster DEM. Processing undertaken at Directorate of Military Survey, approx. 1994. Additional processing for use in HYDALP: a linear interpolation and resampling to 25m x 25m, using Erdas Imagine, ver 8.3.
formats	UK National Transfer Format, Erdas Imagine 8.3, Arc/Info GRID
operating_system	Operating system used for preparing the data for use in BASUK: Solaris 3.4.
format	Erdas Imagine (*.img)
projection	Modified Transverse Mercator Airy spheroid (1838) Central meridian: 2 degrees west scale factor at central meridian: 0.9996 Latitude of origin 49 degrees north False Eastings: 400000m False Northings: 100000m
data_quality	YES
resolution	Original resolution 50m x 50m x 1m. Resolution of data for use in HYDALP: 25m x 25m x 1m.
attributes	Raster coding with attribute = elevation, in metres.
methods	Quoted height accuracy of 1:50 0000 raster DEM is: an rms of 3.0m or better than one half of the vertical interval of the source contours (usually the source contour interval is 10m).
other	Source mapping was the Ordnance Survey Landranger series, 1:50 000. Original data provided in NTF as a regular series of points, which were converted into a cell-based structure.
copyright	Ordnance Survey (Crown Copyright), Southampton, United Kingdom.
contact	Dr David Miller Macaulay Land Use Research Institute Craigiebuckler Aberdeen Ab15 8QH Tel: +44 1224 318611 x 2240 Fax: +44 124 311556 Email: d.miller@macaulay.ac.uk