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影象地图:以航空摄影或卫星遥感影象直接反映制图物体的地图。影象是经纠正的正射象片;符号和注记按一定原则选用。影象容易识别的地物(如居民地、河流等)不另加符号,直接由影象显示;影象不能显示或判读困难的内容(如等高线、高程点等)以符号或注记表示。影象地图具有真实直观、立体感强、与实地直接对比性能好、地物的平面精度较高、成图周期短等优点,但复制技术要求较高。目前,仅用在平坦地区制作大、中比例尺航空影象地图。利用卫星象片制作小比例尺卫星影象地图,由于其高程测定、平面控制和纠正
Map: A map of an object directly mapped by aerial photography or satellite remote sensing. The image is a corrected orthophoto; symbols and notes are selected according to certain principles. Images that are easily identifiable (such as residential areas, rivers, etc.) are displayed without any additional symbols. Images can not display or interpret difficult content (such as contour lines, elevation points, etc.) Said. The image map has the advantages of true and intuitive, strong three-dimensional sense, direct contrast with the field, high plane accuracy of the ground object and short drawing period, but the replication technique requires higher. Currently, large and medium-scale aerial image maps are only used in flat areas. Using satellite imagery to make small-scale satellite image maps, due to its elevation, plane control and correction