Top 10 cddis.nasa.gov Competitors

earth-info.nga.mil

enabling geoint accuracy through geodetic, geophysical and photogrammetric sciences and content.

igs.org

Oliver Montenbruck, Chair Est. 2003

epsg.io

EPSG:4326 Geodetic coordinate system for World: Afghanistan; Albania; Algeria; American Samoa; Andorra; Angola; Anguilla; Antarctica; Antigua and Barbuda; Argentina; Armenia; Aruba; Australia; Austria; Azerbaijan; Bahamas; Bahrain; Bangladesh; Barbados; Belgium; Belarus; Belize; Benin; Bermuda; Bhutan; Bolivia; BES Islands - Bonaire, St Eustatius and Saba; Bosnia and Herzegovina; Botswana; Bouvet Island; Brazil; British Indian Ocean Territory; British Virgin Islands; Brunei; Bulgaria; Burkina Faso; Burundi; Cambodia; Cameroon; Canada; Cape Verde; Cayman Islands; Central African Republic; Chad; Chile; China; Christmas Island; Cocos (Keeling) Islands; Colombia; Comoros; Congo; Congo DR (Zaire); Cook Islands; Costa Rica; Côte d'Ivoire (Ivory Coast); Croatia; Cuba; Curacao; Cyprus; Czechia; Denmark; Djibouti; Dominica; Dominican Republic; East Timor; Ecuador; Egypt; El Salvador; Equatorial Guinea; Eritrea; Estonia; Eswatini (Swaziland); Ethiopia; Falkland Islands (Malvinas); Faroe Islands; Fiji; Finland; France; French Guiana; French Polynesia; French Southern Territories; Gabon; Gambia; Georgia; Germany; Ghana; Gibraltar; Greece; Greenland; Grenada; Guadeloupe; Guam; Guatemala; Guinea; Guinea-Bissau; Guyana; Haiti; Heard Island and McDonald Islands; Honduras; Hong Kong; Hungary; Iceland; India; Indonesia; Iran; Iraq; Ireland; Israel; Italy; Jamaica; Japan; Jordan; Kazakhstan; Kenya; Kiribati; Democratic People's Republic of Korea (North Korea), Republic of Korea (South Korea), Kosovo; Kuwait; Kyrgyzstan; Laos; Latvia; Lebanon; Lesotho; Liberia; Libya; Liechtenstein; Lithuania; Luxembourg; Macao; Madagascar; Malawi; Malaysia; Maldives; Mali; Malta; Marshall Islands; Martinique; Mauritania; Mauritius; Mayotte; Mexico; Micronesia; Moldova; Monaco; Mongolia; Montenegro; Montserrat; Morocco; Mozambique; Myanmar (Burma); Namibia; Nauru; Nepal; Netherlands; New Caledonia; New Zealand; Nicaragua; Niger; Nigeria; Niue; Norfolk Island; North Macedonia; Northern Mariana Islands;

n2yo.com

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satellitemap.space

Decode Two-Line Element sets, calculate orbital parameters, and propagate satellite positions with SGP4. Visualize ground tracks and test TLE accuracy over time.

serc.carleton.edu

SERC is a grant-funded office founded to improve education in the Earth sciences and beyond. Our website is home to hundreds of collaborative projects and one of the world's largest collections of pedagogic resources.

fig.net

international federation of surveyors (fig)