Acquisition of Differential GPS System for Use in Geologic Field Mapping

这笔赠款为购买用于地质测绘的数字数据采集系统的费用提供部分支持。这位名叫约翰·格罗辛格的专业人士在地质领域有一个广泛的项目，重点是沉积地质学和构造地质学。数字数据采集系统的使用将在三个方向上大大提高这一群体的能力。在第一种情况下，数据直接在现场以数字格式获得，便于输入图形工作站进行数据显示和分析。在第二种情况下，通过实施露头规模的遥感能力，数据获取可能会大大加快。在第三种情况下，数字数据收集将允许定义和量化现场测量中的不确定因素。将获得的设备包括具有两个漫游车和无反射器激光测距仪(VectorGIS)的差动GPS系统(Leica 9500)、用于小规模地质特征详细测绘的带有无反射器测距仪的常规全站仪(Leica TM1800)、以及用于数据存储和实时观察的两台便携式笔式计算机和软件。矢量地理信息系统激光测距仪的位置测量可以直接作为GPS接收器实时测量的偏移量。这将允许快速测绘，并最大限度地减少设备和数据集合并问题。这种设备将立即用于绘制沿高度解剖的地形中峡谷网络两侧的陡坡和悬崖面的地图。通过绘制多个峡谷中的陡坡，可以通过大量的沉积岩获得连续的剖面。这些可以在三维中呈现，然后在数据点之间进行内插，以提供三维中最先进的地层关系描述。一旦进入工作站环境，建筑元素的长度尺度和由相边界或其他地层边界定义的岩石体积可以立即量化。*

9904298GrotzingerThis grant provides partial support of the costs of acquiring a digital data acquisition system for use in geologic mapping. The PI, John Grotzinger, has a broad program in geologic field mapping, with emphasis on sedimentary and structural geology. Use of the digital data acquisition system will significantly increase the capability of this group in three directions. In the first case, the data is obtained directly in the field in digital format for easy input into graphics workstations for data display and analysis. In the second case, data acquisition may be greatly accelerated through the implementation of outcrop-scale remote sensing capabilities. In the third case, digital data collection will allow definition and quantification of uncertainties in field measurements.Equipment to be acquired includes a differential GPS system (Leica 9500), with two rovers and reflectorless laser range finders (Vector GIS), a conventional total station with reflectorless range finders for detailed mapping of small-scale geologic features (Leica TM1800), and two portable pen-based computers and software for data storage and real-time viewing. Position measurements from the Vector GIS laser range finder can be directly applied as offsets to measurements taken by the GPS receiver in real time. This will allow rapid mapping, with a minimum number of equipment and data set merging problems. This equipment will find immediate use for mapping along the steep slopes and cliff faces that flank the network of canyons in highly dissected terrains. By mapping the steep slopes in multiple canyons, serial sections can be obtained through volumes of sedimentary rock. These can be rendered in three dimensions and then interpolated between data points to provide state-of-the-art depictions of stratigraphic relationships in three dimensions. Once in the workstation environment, the length scales of architectural elements, and the volumes of rock defined by facies boundaries or other stratal boundaries can be immediately quantified.***