基于机器学习和图像形态学的彩色近代地图数字化——以近代上海地区地表水体信息提取为例

利用科学测绘技术绘制的近代地图作为一类珍贵的历史地理资料,不同程度上反映着过去的地表覆盖情况,数字化则是复原地图所载地表覆盖信息的重要途径。以《华东·上海》地图为例,实现并验证一种基于机器学习和图像形态学的彩色近代地图数字化方法。结果表明,该方法能够充分挖掘地图中的颜色信息和形态结构信息,以半自动方式快速准确地将彩色近代地图中的地表水体信息提取出来。该方法对数字化一类彩色近代地图具有参考价值,有望为精准复原近代以来地表覆盖变迁,深入理解人地关系变化提供数据和方法基础。     

Integrating LiDAR data and conventional mapping of the Fort Center site in south-central Florida: A comparative approach

Abstract

Publicly available LiDAR (Light Detection and Ranging) data provide a potential windfall for archaeologists, permitting the creation of detailed topographic site maps with little more than an internet-connected computer and appropriate software. The quality of these LiDAR data for site mapping is variable, however, and may need to be supplemented with data obtained from conventional mapping techniques. We share insights from recent mapping of the Fort Center site (8GL13) in southern Florida. Specifically, we suggest a method—based on trial and error—for integrating LiDAR and total station survey data. We compare the results of our work with previous efforts at mapping the site based solely on conventional archaeological survey methods, as well as with results based on LiDAR data alone. We conclude that our combination of LiDAR data, corrected by conventional survey data, produces the most accurate map.     

Mapping Sxwóxwiymelh: A Pre-contact Settlement in the Upper Fraser Valley,Southwestern British Columbia

Abstract

Maps and mapping are fundamental to archaeology. Archaeologists sometimes fail to recognize that the maps we use and create are fraught, like material culture, with interpretive complexities. These complexities arise from the fact that maps are created with social meaning dependent on the context in which the map was created and used. Here, we relate our experience with maps and mapmaking at the pithouse settlement of Sxwóxwiymelh, in southwestern British Columbia. We review the mapping history of the site, highlighting the contexts in which the maps were constructed and how they influenced subsequent interpretations of the site. We describe our deconstruction of these earlier maps and how we combined them to create a more accurate and detailed map that presented a rendition of the site as it was prior to significant modern development. This process of map deconstruction and construction allowed us to see several previously unknown details about the ancient settlement (e.g., house form, relative house size, and feature spacing) of Sxwóxwiymelh. In general, this process provides conceptual and practical lessons for incorporating previously collected map data into archaeological research.     

Basic Principles of Landscape Mapping

This report of the Permanent Commission on Landscape Maps of the Geographical Society USSR defines four groups of landscape maps and their basic mapped objects, ranging from detailed, large-scale facies maps (1:10,000) to small-scale maps of less than 1:1,000,000 showing mainly landscapes (in the sense of a given rank of natural areal unit). The report defines various physical-geographic units, such as facies, urochishche and mestnost' and the Russian terms have been retained where the meaning is ambiguous and there is no clear-cut English equivalent. The report also discusses various ways of formulating map legends. A previous paper on landscape mapping appeared in Soviet Geography, February 1961, pp. 34–47.     

Airborne lidar survey of irrigated agricultural landscapes: an application of the slope contrast method

Irrigated agriculture was central to the economies of many of the world’s best known complex societies. New high-resolution digital elevation models (DEM) derived from remotely sensed lidar data give archaeologists the opportunity to study field systems at a scale not previously possible. Here we describe a method called slope contrast mapping that takes advantage of the dissimilarity between artificial and natural slopes to identify and map discrete features. We use this relatively simple method in our own research to identify complexes of agricultural terraces in the North Kohala district, Hawai’i Island. It has also proved useful for mapping the natural landscape, specifically the extent of flat land between valleys suited for irrigated agriculture.     

Airborne LiDAR,archaeology, and the ancient Maya landscape at Caracol,Belize

Advances in remote sensing and space-based imaging have led to an increased understanding of past settlements and landscape use, but – until now – the images in tropical regions have not been detailed enough to provide datasets that permitted the computation of digital elevation models for heavily forested and hilly terrain. The application of airborne LiDAR (light detection and ranging) remote sensing provides a detailed raster image that mimics a 3-D view (technically, it is 2.5-D) of a 200 sq km area covering the settlement of Caracol, a long-term occupied (600 BC-A.D. 250–900) Maya archaeological site in Belize, literally “seeing” though gaps in the rainforest canopy. Penetrating the encompassing jungle, LiDAR-derived images accurately portray not only the topography of the landscape, but also, structures, causeways, and agricultural terraces – even those with relatively low relief of 5–30 cm. These data demonstrate the ability of the ancient Maya to modify, radically, their landscape in order to create a sustainable urban environment. Given the time and intensive effort involved in producing traditional large-scale maps, swath mapping LiDAR is a powerful cost-efficient tool to analyze past settlement and landscape modifications in tropical regions as it covers large study areas in a relatively short time. The use of LiDAR technology, as illustrated here, will ultimately replace traditional settlement mapping in tropical rainforest environments, such as the Maya region, although ground verification will continue to be necessary to test its efficacy.     

Integrating Landsat and Land Systems for Cover Maps in Southern Inland Queensland

Digital analysis of Landsat data is applied to up-dating land cover maps for the Goondiwindi district of southern, inland Queensland. The imagery was paired with climax cover maps obtained from land systems reports with analysis conducted separately for each of three climax cover types (open forest, woodland and open woodland). Computer classification using this approach produced readily interpreted and reliable results. This work demonstrates that Landsat can be used in conjunction with existing, land systems derived maps to produce data that combine the advantages of two approaches to environmental survey, the former being based on current land cover/land use and the latter on the original environment and its land use potential.     

Assessing the geotechnical component of road construction suitability across Australia

Given Australia's dispersed population distribution the construction and maintenance of transportation infrastructure is both essential and expensive. This paper presents a simple model for assessing geotechnical suitability for road construction across the continent, based upon the three major phases of road construction: earthworks, pavement construction and sealing. Data from the recently completed geotechnical landscape map of Australia have been used to operationalise the model at a national scale. The map was coded to the basic spatial units (modified local government areas) of the Australian Resources Information System, so forming an extensive geographic data base suited to a variety of national transport suitability assessments. As a demonstration, the road construction suitability model and the geotechnical data have been applied to the task of mapping the average suitability of each basic spatal unit in Australia for each of the three phases of road construction. The resulting maps provide a comprehensive overview of the instrinsic difficulty of providing roading throughout Australia.     

On the Method of Applied Landscape Research

Landscape science, as a discipline concerned with the integrated investigation of natural areal complexes of different ranks, has been gaining an increasing range of practical applications in connection with optimal design of cultural landscapes. The paper focuses on the use of applied landscape maps in investigations designed to make optimal use of the ecological potential of natural landscapes and their morphological subdivisions. Five types of maps are distinguished, corresponding to successive stages in the investigation. An inventory map presents a picture of the present state of the natural complexes, with emphasis on those features that are most relevant to the stated applied purpose (recreational use, agricultural use, engineering applications, etc.). An evaluative map classifies the natural complexes in terms of their suitability for the stated purpose. A predictive map focuses on the likely future behavior of these complexes, and a recommendatory map lists measures required to enhance the potential of natural areas for particular purposes. The ultimate result is a synthesized map of the entire proposed cultural landscape.     

The battle of London (1554) – reconstructing a renaissance battlefield

Abstract

The confrontation outside London (7 February 1554) between the rebel army of Sir Thomas Wyatt and forces loyal to Queen Mary Tudor has been frequently characterized as a bloodless contest of will rather than a military conflict. This view, however, fails to account for the action’s wider significance in the study of Tudor warfare, a field arguably distorted by the limited number of battles fought within the sixteenth-century British Isles. Furthermore, the encounter is unusually well-documented by written narratives, while its location ensures that the battlefield is depicted on several near-contemporary and subsequent maps, providing opportunities for more detailed investigation through terrain reconstruction. This article will use methodologies of map regression to define the historic landscape of the battle, permitting tactical-level consideration of the engagement and helping to discern the site’s archaeological potential. By doing so, it will also facilitate a reassessment of the battle’s key events and implications.     

A spatial approach to upland vegetation change and human impact: the Aber Valley,Snowdonia

Abstract

Uplands have long been considered important ‘barometers’ for human-environment relationships. Five pollen sequences from the upper Aber Valley (Snowdonia), across an altitudinal gradient, reveal that human impacts have varied temporally on small spatial scales in the region. Woodland taxa persisted into the later Holocene at lower altitudes and sites located at higher altitude reveal a more open landscape history, possibly as a result of increased exposure limiting tree growth at high elevation. Continuous pastoral human land use is evident in the high upland (400 to >600 m AOD) landscape with evidence of clearing, burning and grazing indicators throughout the records covering the last ～6000 years, with increased activity apparent during the last 2000 years. There is no clear evidence to suggest that climate change (e.g. deteriorating climatic conditions from ～850 BC) resulted in land abandonment and it appears more likely that climatic shifts could have led to changes in human land management. The results demonstrate that pastoral land use varied at different altitudes across the Aber Valley upland, and have highlighted the value and potential of high/fine spatial sampling in providing insights into land use history and the mosaic of habitats that result.     

Exploring cultural geography field course using story maps

This article explores the use of Story Maps in a cultural geography field course that uses a place-based approach to understand the Delta Blue’s culture. In this study, Story Maps was used to capture and map student experiences as they engaged in a field study. Student experiences are captured by incorporating different data mediums such as narratives, personal reflections, digital photos, videos and website. Such a project has the potential to challenge students to work collectively and present a coherent story of their field experiences. This, in turn, can be used to improve the design and experience of a field course. The study demonstrates that the availability of simple web-based mapping platform such as Story maps provides students the ability to harness technology to create geocoded narratives, visual representations and spatial documentation to map their field course experience.     

Reconstructing landscape at Chavín de Huántar,Perú: A GIS-based approach

The landscape around the prehistoric Peruvian ceremonial center of Chavín de Huántar has undergone extensive geomorphic and anthropogenic change since the beginning of monumental construction at the site in approximately 1200 BCE. Archaeological and geomorphic stratigraphy from the site and its near periphery provide the data necessary to characterize these changes in detail. This paper reports on the use of GIS-based interpolation tools to approximate a complex prehistoric land surface using unevenly scattered point data. Such an interpolated surface serves as the basis for the reconstruction of the pre-Chavín landscape and assessment of landscape change contemporary with the site.     

THE PRESENT STATE AND TASKS OF COMPLEX MAPPING IN THE USSR

Recent developments in the Soviet Union's program of national thematic mapping and regional complex mapping are reviewed. A comprehensive mapping program along these lines, formulated in 1969 by GUGK, the government planning agency, has not been implemented. National thematic maps in the Soviet Union continue to be compiled by individual government agencies without coordination and without uniformity in legend and design, so that comparability is made difficult. The only thematic GUGK maps now being prepared are concerned with two long-term regional development programs in the Soviet Union–the rural development plan for the Nonchernozem zone of the European RSFSR and the construction of the Baykal-Amur Mainline (BAM) railroad in the Soviet Far East. The need for a comprehensive and coordinated program of national thematic maps and regional atlases or map series is once again stressed in connection with economic planning and environmental problems, and a program of continuously updated regional atlases, based on digital data banks, is proposed. Suggestions are also made for the coordination of thematic maps at the international level.     

WHOSE WOODS ARE THESE? COUNTER-MAPPING FOREST TERRITORIES IN KALIMANTAN,INDONESIA

This paper examines the politics of land and forest rights in Kalimantan (Indonesian Borneo). Forest mapping by government forestry planners allocates rights of resource use and land access according to forest types and economic objectives, only rarely recognizing indigenous occupancy rights or forest territories customarily claimed or managed by local people. As maps and official plans based on them ignore, and in some cases criminalize, traditional rights to forest, forest products, and forest land for temporary conversion to swidden agriculture, indigenous activists are using sketch maps to re-claim territories - a process that requires re-defining many traditional forest rights. The paper considers the political implications of mapping and the implications of a focus on land use rather than forest use.     

Mapping the Nation for War: Landscape in Danish Military Cartography 1800–2000

The focus in this article is on the way the post eighteenth-century cartographic turn in military practices developed into a particular military perception of landscape that continues to set the standard of Danish topographical mapping. My argument is that the development of modern topographical maps is the result of a long process of military comprehension and measurement of the terrain in order to conduct field operations. The demand for spatial data for actual or potential military operations had a direct impact on the specifications of maps produced by the military, as landscape representation was adapted to meet operational demands and as lessons learned from war experience were incorporated. In this and other respects, the development of Danish topographical maps in and after the nineteenth century followed the general trend of European military mapping as regards methods and standards.     

数字近景摄影测量在秦始皇陵百戏坑考古中的应用研究

既要保留遗迹在不同阶段的信息资料,又不影响发掘研究工作的继续进行,一直是考古工作者探索研究的问题。为配合秦始皇陵百戏俑坑的考古发掘工作,为后续考古研究和文物遗迹的保护提供必要的基础信息资料,针对大场景考古发掘现场,通过数字全站仪对文物挖掘现场布设的一定数量控制点进行观测获取其三维点位坐标。利用非量测数码相机获取现场多航带序列影像,通过数码相机检校、自动空中三角测量、影像特征提取与影像匹配、数字微分纠正等数字近景摄影测量方法,获取反映发掘现场文物分布情况的数字高程模型(DEM)和正射影像(DOM)数据。在生成的正射影像图上进行文物轮廓线条的提取,获得发掘现场文物的正射投影矢量图。实现文物位置、形状及分布的平面量测。实验证明:该方法不仅可大面积、快速获取文物挖掘现场文物分布的正射投影平面图,实现考古数字制图,而且能保证一定的精度。具有较高的推广应用价值。     

Rapid On‐site Topographic Mapping with a Handheld Laser Range Finder for a Geoarchaeological Survey in Syria

A digital elevation model and a topographic map of an archaeological site in Syria were created from a field topographic survey with a handheld laser range finder and data post‐processing using a notebook personal computer with Geographical Information System software. The method enabled rapid on‐site topographical mapping even under technical and political restrictions in the country. In an area of about 1 km², coordinates of random points on the land surface were measured, and a DEM with a 10 m interval grid was generated from the point cloud using Kriging interpolation. The DEM enables various topographic representations to be constructed, such as contour lines, cross sections and slope distribution maps. The DEM‐derived contour lines with a 1 m interval were combined with vector data showing roads and buildings to provide a topographic map. Topographic cross sections created from the DEM generally agree with sections surveyed with a hand level and a measurement tape. The obtained DEM and map are useful for preliminary field research.     

Toward Historical Ethnography: Notarial Records and Family History in the Middle Ages

One can easily use nineteenth-century tithe data of England and Wales in a Geographic Information System (GIS) to analyze a range of subjects, for example, land use, productivity, land ownership, or tenancy. Making the tithe data GIS ready, on the other hand, is a nontrivial matter. The tithe data consist of two main types: spatial, that is, the tithe map, and nonspatial attribute data linked to the map. The tithe therefore has the characteristics of a GIS, albeit in paper form. The author outlines the process of creating the structures for building a data repository that allows the storage and dissemination of both tithe schedules and maps in a single GIS-ready system. The author chose Oracle to host the repository. The Oracle Spatial module allows storage of both spatial and attribute information. Oracle also provides the means of serving data to users via the Internet.     

Hunter–gatherer responses to environmental change during the Pleistocene–Holocene transition in the southern North Sea basin: Final Palaeolithic–Final Mesolithic land use in northwest Belgium

Situated along the southern fringe of the North Sea basin, northwest Belgium holds great potential for understanding hunter–gatherer responses to environmental change at the Pleistocene–Holocene transition. Recent intensive fieldwork has yielded valuable data on the palaeoenvironment, chronology, and hunter–gatherer mobility and land use in this region. At the Late Glacial/Early Holocene transition this region was comprised of a landscape of coversand ridges and lakes that flanked the northern part of the Scheldt river basin. This landscape was highly productive for hunter–gatherer populations. As the landscape developed in response to the increasing water table caused by the inundation of the North Sea populations responded by changing their forms of mobility and land use. These changes are indicated by the reduction in the number and density of sites, as well as their geographical settings, from the Late Glacial (Federmesser) and Early Mesolithic to the Middle-Final Mesolithic. Late Glacial/Early Mesolithic sites indicate much higher mobility comprised of rapid displacements of camps and re-occupation of the same coversand ridges over long time-spans. Middle/Late Mesolithic sites indicate a reduction in mobility, increasing focus on prolonged riverside settlement, and a more rigid organization of residential sites.