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1999年9月24日,美国Space Imaging公司在加利福尼亚的范登堡空军基地发射了IKONOS卫星,该卫星通过地面接收站接收高分辨率的卫星图象,收集地球表面的黑白图象和彩色图象:单色图象(即黑白图象)的地面分辨率为1米,而多光谱图象(即彩色图象)的地面分辨率为4米。这是目前分辨率最高的商业卫星图象,任何一个用户都可以向Space Imaging公司或它的代理商订购卫星图象,由于图象不是以地图分幅形式归档的,用户只要提出所需地
On September 24, 1999, Space Imaging Inc. of the United States launched the IKONOS satellite at Vandenberg Air Force Base in California. The satellite receives high-resolution satellite imagery through ground receiving stations and collects black-and-white images and color images of the Earth’s surface : Monochrome images (i.e., black-and-white images) have a ground resolution of 1 meter and multi-spectral images (i.e., color images) have a ground resolution of 4 meters. This is the commercial satellite image with the highest resolution so far. Any user can order satellite images from Space Imaging or its agents. Since the images are not archived in map format,