acknowledgement

Organization Web address
Satellite data
The CHAMP satellite is operated by GeoForschungsZentrum (GFZ) Potsdam http://www.gfz-potsdam.de/pb1/op/champ/
Continental data
Aeromagnetic compilations of South America, Africa, China and Mongolia were provided by GETECH http://www.getech.com/
The digital magnetic anomaly database and map for the North American continent is the result of a joint effort by the Geological Survey of Canada (GSC), U.S. Geological Survey (USGS), and Consejo de Recursos Minerales of Mexico (CRM) http://crustal.usgs.gov/projects/namad/the_project.html
The digital Magnetic Map of Australia (4th Edition) was compiled by Geoscience Australia http://www.ga.gov.au/map/magnetics_info.html
Regional ground magnetic map of India was digitized by D. Ravat and co-workers from the publication by Qureshy, M.N., 1982, Geophysical and landsat lineament mapping - An approach illustrated from west-central and south India, Photogrammetria, v. 37, p. 161-184  
The Antarctic Digital Magnetic Anomaly Map is compiled by the ADMAP Expert Group http://www.geoscience.scar.org/admap/
Aeromagnetic map of India supplied by the Geological Survey of India http://www.gsi.gov.in/
Aeromagnetic compilation of the Middle East. Reference: C. Reeves, ITC, AAIME ( Aeromagnetics of Arabia, India and the Middle East) (2003) CD ROM version  
East Asia anomaly map compiled by the Geological Survey of Japan. Reference: T. Ishihara, K. Kisimoto, Magnetic anomaly map of East Asia 1:4,000,000., (1996) Geological Survey of Japan.  
Anomaly Map for Northern, Western and Eastern Europe (EUROMAG) was compiled by Bundesanstalt fuer Geowissenschaften und Rohstoffe, Institut fuer Geowissenschaftlische Gemeinschaftsaufgaben, and National Academy of Sciences of the Ukraine. Published: Wonik, T., Trippler, K., Geipel, H., Greinwald, S., Pashkevitch, I., 2001. Magnetic Anomaly Map for Northern, Western and Eastern Europe. Terra Nova 13, 203-213, 2001. http://www.bgr.bund.de/
Arctic and North Atlantic oceans and adjacent land areas compiled by the Geological Survey of Canada. Reference: J. R. Verhoef , R. Macnab, W. Roest, J. Arkani-Hamed, Geological Survey of Canada, Magnetic anomalies of the Arctic and North Atlantic oceans and adjacent land areas (1996), Open file 3125a  
Marine data
Africa Museum, Belgium http://www.africamuseum.be/
Alaska Department of Natural Resources, USA http://www.dnr.state.ak.us/
Alfred Wegener Institute for Polar Research, Bremerhaven, Germany http://www.awi.de/de/
Antarctic Environmental Data Centre, British Antarctic Survey, UK http://www.antarctica.ac.uk/
Australia Bureau Mineral, Australia http://www.abare.gov.au/
Australian Government, Geoscience Australia, Australia htttp://ga.gov.au
B.N.D.O. / C.N.E.X.O., France http://walrus.wr.usgs.gov/infobank/programs/html/organizations2idshtml/b/Bndo-Cnexo_ids.html
Bedford Institute for Oceanography , Canada http://www.bio.gc.ca/
Boston Edison, USA http://www.nstaronline.com/residential/
British Geological Survey , UK http://www.bgs.ac.uk
British Oceanographic Data Center, UK http://www.bodc.ac.uk/
Canada Department of Energy, Mines and Resources, Canada http://www.nrcan-rncan.gc.ca/com/index-eng.php
Canadian Geological Survey, Canada http://gsc.nrcan.gc.ca/index_e.php
Canadian Hydrographic Service, Canada http://www.charts.gc.ca/pub/en/
Center for Inter-American Mineral Resource Investigations (CIMRI), USA http://www.usgs.gov
Council for Geosciences, South Africa http://www.geoscience.org.za/
Defense Mapping Agency, USA http://www.nga.mil/
Department of Energy, USA http://www.energy.gov/
Far East Scientific Center, Russia http://www.mms.gov/alaska/icam/nesc/nesc.htm
Federal Institute for Geosciences and Natural Resources (BGR), Germany http://www.bgr.bund.de
First Institute of Oceanography, China http://www.soa.gov.cn/
French Research Insitute for the Exploitation of the Sea (IFREMER), France http://www.ifremer.fr
Geomer Data Bank Orstom Noumea, France http://noumea.orstom.nc/index.htm
Geophysics Division, DSIR, New Zealand ttp://www.nzs.com/science
GNS Science, Institute of Geological and Nuclear Sciences, New Zealand http://www.gns.cri.nz/
GuangZhou Marine Geological Survey MGMR, China http://www.cgs.gov.cn
Hamilton College, USA http://www.hamilton.edu
Institut de Physique du Globe de Paris, France http://www.ipgp.jussieu.fr/
Pacific Oceanological Institute, Russia http://www.poi.dvo.ru/eng/index.shtml
Japan Chiba University, Japan http://www.chiba-u.ac.jp/
Japan Geological Survey, Japan http://www.aist.go.jp/GSJ/
Japan Hydrographic Department, Japan http://www1.kaiho.mlit.go.jp/jhd-E.html
Japan Kobe University, Japan http://www.kobe-u.ac.jp/en/
Jet Propulsuion Laboratory, USA http://www.jpl.nasa.gov/
Lamont-Doherty Earth Observatory, USA http://www.ldeo.columbia.edu
Los Alamos National Laboratory, USA http://www.lanl.gov/
Ministry of Energy, Mines & Petroleum Resources, British Columbia, Canada https://www2.gov.bc.ca/
Ministry of Geology of the U.S.S.R, Russian Federation http://www.ras.ru/RAS/oggggn/
Minnesota Geological Survey, USA http://www.geo.umn.edu/mgs/
National Aeronautics and Space Agency (NASA), USA http://www.nasa.gov/
National Oceanic and Atmospheric Administration, USDOT, USA http://www.noaa.gov/
National Science Foundation, USA http://www.nsf.gov/
Natural Environmental Research Counsel, UK http://www.nerc.ac.uk/
Naval Research Laboratory, USA http://www.nrl.navy.mil/
NAVOCEANO, USA https://www.navo.navy.mil/pao/ocean/feb-mar-2007/co-corner.html
Netherlands http://www.netherlands-embassy.org/
Netherlands Hydrographic, Netherlands http://www.hydro.nl/pgs/
Ocean Drilling Program /Texas A&M, USA http://www.iodp.org/
Oceanographic Research Institute, South Africa http://www.ori.org.za/
Oregon State University, USA http://oregonstate.edu/
Purdue University, USA http://www.purdue.edu/
Rice University, USA http://www.rice.edu/
Scripps Institution of Oceanography, USA http://sio.ucsd.edu/
Southern African Data Centre for Oceanography, South Africa http://sadco.csir.co.za/
Texas A&M University, USA http://www.tamu.edu/
The Kentucky Geological Survey, USA http://www.uky.edu/KGS/
The Tennessee Geological Survey, USA http://www.state.tn.us/environment/tdg/
The Tennessee Valley Authority, USA http://www.tva.gov/
The University of Texas at Austin, USA http://www.ig.utexas.edu
United Kingdom Hydrographic Office, UK http://www.ukho.gov.uk/
United Kingdom NationalOceanography Center, UK http://www.noc.ac.uk/
United States Geological Survey (USGS), USA http://www.usgs.gov/
United States Naval Oceanographic Office (US NOS), USA http://www.navo.hpc.mil/
Univerity of California, San Diego http://www.ucsd.edu/
Universite Francaise Pacifique, Tahiti http://www.upf.pf/
University of Alabama, USA http://www.ua.edu/
University of Cape Town, South Africa http://www.uct.ac.za/
University of Hawaii, USA http://www.hawaii.edu/
University of Japan Ryukyus, Japan http://www.u-ryukyu.ac.jp/en/index.html
University of Miami, USA http://www6.miami.edu/UMH/CDA/UMH_Main/
University of Rhode Island, USA http://www.uri.edu/
University of Texas, Austin, USA http://www.utexas.edu/
University of Texas, Institue for Geophysics, USA http://www.ig.utexas.edu/
University of Tokyo, Japan http://www.u-tokyo.ac.jp/index_e.html
University of Witwatersrand, Johannensburg, South Africa http://www.wits.ac.za/
United States NAVY, USA http://www.navy.mil/
Woods Hole Oceanographic Institution, USA http://www.whoi.edu/