Spearfish Sample Database

The spearfish sample database is being distributed to provide users with a solid database on which to work for learning the tools of GRASS. This document provides some general information about the database and the map layers available. With the release of GRASS 4.1, the GRASS development staff is pleased to announce that the sample data set spearfish is also being distributed. The spearfish data set covers two topographic 1:24,000 quads in western South Dakota. The names of the quads are Spearfish and Deadwood North, SD. The area covered by the data set is in the vicinity of Spearfish, SD and includes a majority of the Black Hills National Forest (i.e., Mount Rushmore). It is anticipated that enough data layers will be provided to allow users to use nearly all of the GRASS tools on the spearfish data set. A majority of this spearfish database was initially provided to USACERL by the EROS Data Center (EDC) in Sioux Falls, SD. The GRASS Development staff expresses acknowledgement and thanks to: the U.S. Geological Survey (USGS) and EROS Data Center for allowing us to distribute this data with our release of GRASS software; and to the U.S. Census Bureau for their samples of TIGER/Line data and the STF1 data which were used in the development of the TIGER programs and tutorials. Thanks also to SPOT Image Corporation for providing multispectral and panchromatic satellite imagery for a portion of the spearfish data set and for allowing us to distribute this imagery with GRASS software. In addition to the data provided by the EDC and SPOT, researchers at USACERL have dev eloped several new layers, thus enhancing the spearfish data set. To use the spearfish data, when entering GRASS, enter spearfish as your choice for the current location. This is the classical GRASS GIS dataset from 1993 covering a part of Spearfish, South Dakota, USA, with raster, vector and point data. The Spearfish data base covers two 7.5 minute topographic sheets in the northern Black Hills of South Dakota, USA. It is in the Universal Transverse Mercator Projection. It was originally created by Larry Batten while he was with the U. S. Geological Survey's EROS Data Center in South Dakota. The data base was enhanced by USA/CERL and cooperators. <pre> </pre>

斯皮尔菲什（Spearfish）示例数据库现已发布，旨在为用户提供一套完备的实操数据库，用于学习GRASS地理信息系统工具。本文档将介绍该数据库的基本概况，以及可获取的地图图层。伴随GRASS 4.1版本的发布，GRASS开发团队荣幸地宣布，斯皮尔菲什示例数据集同步公开分发。

该数据集覆盖南达科他州西部两幅1:24000比例尺地形图幅，两幅图幅分别为南达科他州的斯皮尔菲什（Spearfish）与北戴德伍德（Deadwood North）。数据集覆盖范围位于南达科他州斯皮尔菲什周边区域，涵盖黑山国家森林公园（Black Hills National Forest）的大部分区域，其中包括拉什莫尔山（Mount Rushmore）。

本次发布的图层数量已覆盖GRASS绝大多数工具的实操需求，用户可基于斯皮尔菲什数据集完成几乎全部GRASS工具的学习与演练。该数据库的大部分原始数据由南达科他州苏福尔斯市的EROS数据中心（EROS Data Center, EDC）提供给美国陆军工程研究与实验室中心（USACERL）。

GRASS开发团队在此鸣谢：美国地质调查局（U.S. Geological Survey, USGS）与EROS数据中心允许我们随GRASS软件版本同步分发本数据集；同时感谢美国人口普查局（U.S. Census Bureau）提供TIGER/Line数据与STF1数据样本，这些数据被用于开发TIGER相关程序与教程。

此外，感谢SPOT图像公司（SPOT Image Corporation）为斯皮尔菲什数据集的部分区域提供多光谱与全色卫星影像，并允许我们随GRASS软件同步分发该影像数据。除EROS数据中心与SPOT公司提供的数据外，USACERL的研究人员还开发了若干新增图层，进一步完善了斯皮尔菲什数据集。

若需使用斯皮尔菲什数据集，在启动GRASS时，请将当前工作位置选择为spearfish。本数据集是1993年发布的经典GRASS地理信息系统数据集，覆盖美国南达科他州斯皮尔菲什部分区域，包含栅格、矢量与点三类数据。

斯皮尔菲什数据库覆盖美国南达科他州黑山北部两幅7.5分钟比例尺地形测绘图幅。该数据集采用通用横轴墨卡托投影（Universal Transverse Mercator Projection）坐标系。该数据集最初由拉里·巴滕（Larry Batten）在任职于美国地质调查局南达科他州EROS数据中心期间创建。后续由USACERL及其合作方对该数据库进行了扩充完善。
<pre> </pre>