Terra

Terra gives you quick access to astronomical information, weather forecasts, earthquake reports, time zones and factual information about any part of the Earth. It presents a 3D globe which you can spin to see any point on Earth. You can also move forward and back in time.

Astronomy
You can see:
•your current location
•the altitude and azimuth of the Sun and Moon at any location on Earth and at any date and time
•the rising and setting times for Sun and Moon, at any location and date New
•the illumination of the Earth by the Sun at any time, the Terminator line and the twilights (civil, nautical and astronomical)
•the length of the day for any location and date
•the phase of the Moon and its appearance to the observer New
•the shortest distance and compass bearing between any two locations
•sidereal time, Greenwich and local

Time Zones: 
Terra shows a globe with a political map of the Earth with more than 250 locations highlighted. Tapping a button will center the globe on a location and show its local time, correct for standard or daylight.

Maps: Terra can link to the Apple Maps or Google Maps applications for a detailed view of any location.

Weather: 
Terra will link to the Weather Underground web site and show the current conditions and forecast for any location.

Earthquakes: Terra will download the latest earthquake report from the USGS and display the quakes on the globe. You can jump to the USGS web site for more detailed information about any quake.

Facts: Terra will link to the CIA World Factbook web site for almost every country.

It will be useful to:
•travelers,
•business people,
•photographers, cinematographers,
•students,
•architects,
•gardeners, landscapers,
•amateur astronomers,
•radio hams,
•those concerned with solar energy.

更新履歴
Updated the Weather Underground interface. Added a user query for the use of GPS.