...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of Volcanology: Journal of the International Association of Volcanology and Chemistry of the Earth s Interior >Rapid, low-cost photogrammetry to monitor volcanic eruptions: An example from Mount St. Helens, Washington, USA
【24h】

Rapid, low-cost photogrammetry to monitor volcanic eruptions: An example from Mount St. Helens, Washington, USA

机译：快速，低成本的摄影测量法来监测火山喷发：美国华盛顿州圣海伦斯山的一个例子

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We describe a low-cost application of digital photogrammetry using commercially available photogrammetric software and oblique photographs taken with an off-the-shelf digital camera to create sequential digital elevation models (DEMs) of a lava dome that grew during the 2004-2008 eruption of Mount St. Helens (MSH) volcano. Renewed activity at MSH provided an opportunity to devise and test this method, because it could be validated against other observations of this well-monitored volcano. The datasets consist of oblique aerial photographs (snapshots) taken from a helicopter using a digital single-lens reflex camera. Twelve sets of overlapping digital images of the dome taken during 2004-2007 were used to produce DEMs and to calculate lava dome volumes and extrusion rates. Analyses of the digital images were carried out using photogrammetric software to produce three-dimensional coordinates of points identified in multiple photos. The evolving morphology of the dome was modeled by comparing successive DEMs. Results were validated by comparison to volume measurements derived from traditional vertical photogrammetric surveys by the US Geological Survey Cascades Volcano Observatory. Our technique was significantly less expensive and required less time than traditional vertical photogrammetric techniques; yet, it consistently yielded volume estimates within 5% of the traditional method. This technique provides an inexpensive, rapid assessment tool for tracking lava dome growth or other topographic changes at restless volcanoes.
机译：我们描述了一种低成本的数字摄影测量应用，该摄影测量使用市售的摄影测量软件和由现成的数码相机拍摄的倾斜照片来创建熔岩穹顶的顺序数字高程模型（DEM），该模型在2004年至2008年爆发时圣海伦火山（MSH）火山。 MSH的新活动提供了设计和测试此方法的机会，因为可以对照对该火山进行良好监视的其他观察结果进行验证。数据集由使用数字单镜头反光照相机从直升机上拍摄的斜航拍照片（快照）组成。 2004年至2007年期间拍摄的十二个圆顶的重叠数字图像集用于生成DEM并计算熔岩圆顶的体积和挤压速率。使用摄影测量软件对数字图像进行分析，以生成在多张照片中识别出的点的三维坐标。通过比较连续的DEM对圆顶的形态进行建模。通过与美国地质调查级联火山天文台从传统的垂直摄影测量法得出的体积测量结果进行比较，验证了结果。我们的技术比传统的垂直摄影测量技术便宜得多，所需时间也更少。但是，它始终能够得出与传统方法相比不到5％的体积估算值。该技术提供了一种廉价，快速的评估工具，可用于跟踪熔岩穹顶的生长或不安定火山处的其他地形变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号