Edited by Rachel Duncan 4th Edition ISBN 0-907649-91-2 London ...

64 RGS-IBG Polar Expeditions Manual
Satellite Imagery
See also www.rgs.org/mapping:
Infoterra Ltd (Was formed by a combining of the National Remote Sensing Centre
and the Earth Observation Services of Astrium GmbH Germany in 2001)
Infoterra Ltd, Delta House, Southwood Crescent, Southwood, Farnborough, Hampshire
GU14 0NL, UK. Tel: +44 (0)1252 362000; fax: +44 (0)1252 375016;
email: info@infoterra-global.com
Website: www.infoterra-global.com/
National Imagery and Mapping Agency (NIMA) has of Nov 2003 been superceded
by the National Geospatiale-Intelligence Agency (NGA)but maintains the same address
of . 4600 Sangamore Road, Bethesda, MD 20816-5003.
US NOAA Defense Mapping Agency
Has stocked ONCs (Operational Navigation Charts) 1: 1 mill and TPCs (Tactical
Pilotage Charts) 1: 500,000 and GNC charts at prices below anything in the UK and
available by mail order paid for by credit card. While not necessarily that accurate for
roads/settlements, they give an excellent overview of the terrain and may be the best
map available for your area. NOAA Distribution Branch, N/CG33, National Ocean
Service, Riverdale, MD 20737-1199, tel 310-436 6990, fax 301-436 6829, Website:
www.noaa.gov/
Both establishments maintain reference maps and catalogues and will supply Landsat
imagery on pre-payment. EROS Data Centre alone maintains world-wide coverage. NRSC
is cheaper but they may not have the scene you want. Index maps are also available for
reference at the Royal Geographical Society (with IBG).
Navigational Aids
A very useful navigation tool to have is the Plotfix®. This device is a perspex triangle with
6 scales marked in minutes of lat/long allowing one to match the intervals of the latitude
and longitude of the map one is using to plot GPS waypoints.
Propietary and freeware/software is readily available which allows easy, quick and error
free transfer of waypoints and GPS data between GPS and PC’s along with waypoint and
route management and creation.
Suppliers
• Compasses:
o Silva (www.silva.se/)
o Suunto (www.suunto.com/)
• GPS systems:
o Garmin (www.garmin.com/)
o Silva (www.silva.se/)
o Magellan (www.magellangps.com/en/)
o Trimble (www.trimble.com/)
• Sextants: