Assessment and Significance of a World War II battle site: recording the USS Emmons using a High‐Resolution DEM combining Multibeam Bathymetry and SfM Photogrammetry

The USS Emmons, a 106m US Navy Gleaves‐class destroyer minesweeper that sank in 40m of water off Okinawa Island, Japan after kamikaze attack in 1945, is used as a case study for examining the history, multivocal significance, and heritage management of a World War II naval battle site. A baseline record of the site was made using an innovative method incorporating precise control points obtained from high‐resolution multibeam echosounding bathymetry to generate 3D models using structure‐from‐motion photogrammetry. The 3D models produced can be used for sharing information about this underwater cultural heritage and for future in situ monitoring of the archaeological remains.     

GIS技术在萨拉乌苏考古遗址公园规划设计中的应用

传统规划设计工作的技术平台多以计算机辅助设计(CAD)为主,本工作以内蒙古自治区鄂尔多斯萨拉乌苏考古遗址公园规划为例,将Arc GIS Desktop作为技术平台应用到公园的规划设计工作中。首先,通过对规划区的实地踏勘,采集相关数据和资料,进行规划区数据库建设;其次,在数据库建设的基础上,通过GIS技术构建与现实环境对应的虚拟地理信息空间,实现规划区景观的三维可视化;最后,利用三维景观模型对现实地理环境进行模拟、分析及虚拟场景飞行。不同于传统CAD的二维工作平台,本工作借助GIS对空间数据和属性数据的强大处理功能及其三维景观可视化模块,为实现内蒙古鄂尔多斯萨拉乌苏考古遗址公园的科学规划提供辅助。     

Groundwater discharges in the Baltic Sea: survey and quantification using a schlieren technique application

Groundwater seeps are known to occur in Eckernförde Bay, Baltic Sea. Their discharge rate and dispersion were investigated with a new schlieren technique application, which is able to visualize heterogeneous water parcels with density anomalies down to Δσ_t = 0.049 on the scale of millimeters. With the use of an inverted funnel, discharged fluids can be captured and the outflow velocity can be determined. Overall, 46 stations could be categorized by three different cases: active vent sites, seep‐influenced sites, and non‐seep sites. New seep locations were discovered, even at shallow near‐shore sites, lacking prominent sediment depression, which indicate submarine springs. The detection of numerous seeps was possible and the groundwater‐influenced area was defined to be approximately 6.3 km². Flow rates of between 0.05 and 0.71 l m^?2 min^?1 were measured. A single focused fluid plume, which was not disturbed by the funnel was recorded and revealed a flux of 59.6 ± 20 ml cm^?2 min^?1 and it was calculated that this single focused plume would be strong enough to produce a flow rate through the funnel of 1.32 ± 0.44 l m^?2 min^?1. The effect of different seep‐meter funnel sizes is discussed.     

复杂情境中的日常活动可视化与应用研究

时间地理学以时空路径为代表的符号系统由于具备抽象、简明、直观等特点,在地理学及其他社会科学领域得到了广泛传播与应用。随着GIS与地理可视化技术的不断进步、高精度时空行为数据的批量生产等,真实地理环境中个体时空运动轨迹的三维可视化技术也在不断进步。信息化社会的到来与城市社会转型等使得现代社会中的人类日常活动变得十分复杂,时间地理学由于直观刻画时空间中人类活动的时空连续性与复杂情境性而备受关注。本文首先界定了人类日常活动复杂情境的分析维度,包括日常情境、企划情境、地理情境、社会情境、技术情境等,并在此基础上将绝对时空间坐标系下的时空路径拓展到相对时空观下多维活动序列的可视化表达。其次,简单说明Daily life与VISUAL-Time PAc TS/energy use等可视化工具,介绍时空路径在复杂情境性下的可视化、模式挖掘及个案分析。最后,案例分析个体与群体尺度上活动情境可视化方法在家庭成员间分工与互动、日常活动模式差异与家庭能源消耗差异等方面的应用。     

基于网络游记语义分析和GIS可视化的游客时空行为与情绪关系实证研究——以北京市为例

游客的情绪体验在很大程度上影响着他们的体验质量、目的地形象感知及满意度等旅游行为,但情绪和时空行为联系的研究尚未充分展开。本文从时间地理学和行为地理学视角出发,结合情感地理思维,以“马蜂窝网站”2017年北京自由行游记为数据源,通过语义分析识别游客情绪及时空行为要素,并在GIS中叠加整合进行交互分析与解释。一方面,研究揭示了游客时空行为及情绪特征,并探讨了情绪在全局/局部空间自相关的集聚性,以及游客时空行为与情绪的关系;另一方面,归纳出作用于行为和情绪的时空环境条件因素：空间特点、时间预算、与他人的互动。本文通过实证研究总结具体旅游情境下情绪与行为的响应和关联,探索个体时空行为模式中情绪要素的意义,讨论时空环境对行为和情绪的影响,并对区域旅游发展和景区服务管理提供建议。     

Ground Penetrating Radar in the Northern Great Lakes: A Trial Survey of a Contact Period Occupation in Marquette County,Michigan

ABSTRACT

Timing, inclement weather, and limited budgets can obstruct archaeological survey efforts. Here, we ameliorate some of these with use of ground penetrating radar (GPR) at the Goose Lake Outlet #3 (GLO#3) site (20MQ140). GPR surveys to guide survey and excavation efforts in these well-drained sandy soils are limited. GPR imagery exhibited false positives; however, shovel probes, subsequent site excavation, and artifact analysis led to numerous discoveries at this protohistoric site—including glass trade beads dating to the 1630s. These discoveries solidify evidence for some of the earliest European-made trade items in the region and provide further confirmation for placement of an Indian trail and ancient travel corridor between Lake Superior and Lake Michigan. Two ¹⁴C samples obtained from moose-bone in features with trade goods fall within the expected occupation range of 1633–1668 and 1615–1647. Several anomolies, possible hearth clusters were seen on the GPR imagery; however, many features remained invisible.     

Poster power: rural electrification,visualization, and legibility in the United States

This article examines graphic visualization and visuality in Lester Beall’s 1937 series of posters for the United States Rural Electrification Administration. The posters are commonly thought of as raising public awareness of the benefits of electricity in the rural America, but what was meant by public and awareness in 1937 in terms of rural reform in the United States has remained unclear until now. This article posits that to understand how these posters were seen in 1937 requires an acknowledgment of how Beall’s posters graphically visualized the complexities of rural electrification, and how graphic visualization was contiguous with bureaucratic communication and the visual sensitivity of a public.     

国外交通地理学研究的知识图谱与进展

交通地理学作为人文地理学的重要分支,一直充满着活力与多样性,获得人文地理学者的广泛关注。本文基于CiteSpace可视化软件,采用Web of Science中收录1982-2014年的4840篇交通地理学论文作为原始数据,梳理了近30年的研究脉络,绘制了学科发展的知识图谱,系统地归纳了学科的研究热点与发展趋势,以期为中国交通地理学研究提供借鉴。研究发现:国外交通地理学研究方法和研究内容日趋多元化,研究视角趋向微观化,质性研究突显;初步形成城市规划学派、理论地理学派、时间地理学派等六大学术共同体;出现社会、行为、文化和流动的诸多转向,呈现出人本导向、信息导向和交叉化的发展趋势。     

基于微博的西安市居民夜间活动时空分布研究

在我国城市化过程中,由于城市基础设施、公共交通等方面规划建设的需要,对居民活动的研究成为人文地理及城市规划领域所关注的重点。随着"大数据"时代的到来,改变了以往研究居民活动的方式。本文通过新浪微博平台提供的API接口,采用Ajax技术抓取包含时空信息的西安市微博数据,运用Arc GIS10.1中的热度分析工具,以可视化的表达形式揭示出:西安市居民夜间活动在大尺度范围内与城市的区域定位、居民结构及活动时间关系密切。同时,本文采用微博数据来研究居民活动的方法为研究这类问题提供了一种新的尝试。