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锁定老帖子 主题:GoogleMap 是如何实现的?
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发表时间:2006-10-30
GoogleEarth 和 World wind 又是用什么技术实现的呢? 另本公司有意扩展相关业务,有相关技术能力者望于之联系。QQ:265823 (kandy.xu) MSN:jjyyxu@hotmail.com 声明:ITeye文章版权属于作者,受法律保护。没有作者书面许可不得转载。
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发表时间:2006-10-30
只要有自己的间谍卫星 其它的都好办.
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发表时间:2006-10-31
Google好像还没自己发过卫星呢,更别提间谍卫星,造反是要杀头di,呼呼
from wikipedia Like other Google web applications, a large amount of JavaScript was used to create Google Maps. As the user drags the map, the grid squares are downloaded from the server and displayed to the user. When a user searches for a business, the location is pin-pointed with a red pin, which is actually a transparent PNG placed over the map. The technique of providing greater user-interactivity by performing asynchronous network requests with Javascript and XML has recently become known as Ajax. Specifically, Google Maps was built using the AjaXSLT framework. The GIS (map) data used in Google Maps are provided by Tele Atlas and NAVTEQ, while the small patches of high-resolution satellite imagery are largely provided by DigitalGlobe and its QuickBird satellite, with some imagery also from government sources. The main global imagery base called NaturalVue was derived from Landsat 7 imagery by MDA Federal (formerly Earth Satellite Corporation). This global image base provide the essential foundation for the entire application. The underlying technology used in both Google and Yahoo! maps is available from deCarta (formerly Telcontar)[2]. |
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发表时间:2006-10-31
google真是厉害,,,
努力学习,,,, |
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发表时间:2006-10-31
那是怎么做到的呢?GoogleMap是用的 AJAX
GE是怎么办到的呢 |
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发表时间:2006-10-31
我有地图有照片是不是就可以作GIS的东东了?
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