从0.6 m Quick Bird、2.5 m ALOS、10.0 m ALOS遥感影像中分别提取崩岗的特征数据,分析遥感影像的分辨率对崩岗数据精度的影响。结果表明:从0.6 m Quick Bird能容易地提取崩岗数据,且重现性较好,从2.5 m ALOS能提取崩岗数据,但重现性不...从0.6 m Quick Bird、2.5 m ALOS、10.0 m ALOS遥感影像中分别提取崩岗的特征数据,分析遥感影像的分辨率对崩岗数据精度的影响。结果表明:从0.6 m Quick Bird能容易地提取崩岗数据,且重现性较好,从2.5 m ALOS能提取崩岗数据,但重现性不强,从10.0 m ALOS无法提取崩岗。从0.6 m Quick Bird和2.5 m ALOS提取的崩岗,数量基本一致,但位置不一致、边界不重合、形状差别很大,从2.5m ALOS提取的崩岗周长平均减少20.83%,占58.33%的崩岗面积减少了,平均减少19.78%。因此,可断定0.6 m Quick Bird能反映崩岗的实际情况,2.5 m ALOS能较好地反映崩岗的实际情况,10.0 m ALOS完全不能提取崩岗数据。但高精度遥感影像的获取比较困难,且价格较贵。展开更多
Ancient Egyptians change the orientation of their temples from True East （during the old kingdom） to the Winter Solstice （during the new kingdom）, because of the cultic change from a rather pure solar to a mixed s...Ancient Egyptians change the orientation of their temples from True East （during the old kingdom） to the Winter Solstice （during the new kingdom）, because of the cultic change from a rather pure solar to a mixed solar religion （R^a to Amfin-R^a）. The traditional methods for measuring the orientations and alignment, the axis of ancient Egyptian constructions like field survey are usually time consuming and costly. Remote sensing techniques are becoming powerful tools for archaeologists in their discovery and exploration ancient sites. Many researchers have considered very high resolution sensors, especially IKONOS with 1.0 m resolution, QuickBird with 0.61 m resolution and Geoeye-1 with 0.50 m resolutions as possible substitutes of the classical aerial photos used for multi purposes such as cartographic at large scales. Research objectives is to establish a practical methodology for calculation the orientation of the main axis of the ancient Egyptian temple based on very high resolution QuickBird images as alternative for traditional methods. Five sites have been selected to perform our research lies in Luxor city, Egypt： Luxor, Karnak, Hatshepsut, Ramesseum temples and Madinat Habu. Analysis of the obtained results has been done to explain the type of orientation of Luxor temples. Previous archaeologist＇s studies classified the orientation of ancient Egyptians constructions into astronomical orientation （solar, moon and stars） or topographical orientation （Nile direction and hills） or both. A comparative study has been done between the results obtained from traditional methods （field survey and Google Earth images） and from very high resolution QuickBird satellite images. From the obtained results, error in the main axis azimuth of Luxor, Karnak, Madinat Habu, Hatshepsut and Ramesseum temples range about minutes of are. One can concluded that using VHR （Very High Resolution） QuickBird satellite images in calculation the azimuth of ancient sites is the accurate method.展开更多
文摘从0.6 m Quick Bird、2.5 m ALOS、10.0 m ALOS遥感影像中分别提取崩岗的特征数据,分析遥感影像的分辨率对崩岗数据精度的影响。结果表明:从0.6 m Quick Bird能容易地提取崩岗数据,且重现性较好,从2.5 m ALOS能提取崩岗数据,但重现性不强,从10.0 m ALOS无法提取崩岗。从0.6 m Quick Bird和2.5 m ALOS提取的崩岗,数量基本一致,但位置不一致、边界不重合、形状差别很大,从2.5m ALOS提取的崩岗周长平均减少20.83%,占58.33%的崩岗面积减少了,平均减少19.78%。因此,可断定0.6 m Quick Bird能反映崩岗的实际情况,2.5 m ALOS能较好地反映崩岗的实际情况,10.0 m ALOS完全不能提取崩岗数据。但高精度遥感影像的获取比较困难,且价格较贵。
文摘Ancient Egyptians change the orientation of their temples from True East （during the old kingdom） to the Winter Solstice （during the new kingdom）, because of the cultic change from a rather pure solar to a mixed solar religion （R^a to Amfin-R^a）. The traditional methods for measuring the orientations and alignment, the axis of ancient Egyptian constructions like field survey are usually time consuming and costly. Remote sensing techniques are becoming powerful tools for archaeologists in their discovery and exploration ancient sites. Many researchers have considered very high resolution sensors, especially IKONOS with 1.0 m resolution, QuickBird with 0.61 m resolution and Geoeye-1 with 0.50 m resolutions as possible substitutes of the classical aerial photos used for multi purposes such as cartographic at large scales. Research objectives is to establish a practical methodology for calculation the orientation of the main axis of the ancient Egyptian temple based on very high resolution QuickBird images as alternative for traditional methods. Five sites have been selected to perform our research lies in Luxor city, Egypt： Luxor, Karnak, Hatshepsut, Ramesseum temples and Madinat Habu. Analysis of the obtained results has been done to explain the type of orientation of Luxor temples. Previous archaeologist＇s studies classified the orientation of ancient Egyptians constructions into astronomical orientation （solar, moon and stars） or topographical orientation （Nile direction and hills） or both. A comparative study has been done between the results obtained from traditional methods （field survey and Google Earth images） and from very high resolution QuickBird satellite images. From the obtained results, error in the main axis azimuth of Luxor, Karnak, Madinat Habu, Hatshepsut and Ramesseum temples range about minutes of are. One can concluded that using VHR （Very High Resolution） QuickBird satellite images in calculation the azimuth of ancient sites is the accurate method.
