Public Targets,Private Choices: Urban Climate Governance in the Pacific Northwest

A survey of local governments participating in two urban climate change programs is presented to determine the mechanisms used to reach emissions reduction goals and the motivations for participation. Results support previous research that shows a preference for policies that rely on changes in individual behavior, while also providing new insights into how mitigation responsibilities are distributed among the public and private sector and the relative importance of scientific consensus, economic incentives, and federal inaction on local government justification for climate-related policies. The article concludes with a discussion of urban climate governance as part of a wider system of neoliberal climate governance.     

Rapid generation of Digital Elevation Models from topographic maps

Abstract

In this article we demonstrate that substantial gains in time can be made when using point sampling rather than contour line digitising for generation of Digital Elevation Models (DEMs). A simple sampling scheme, based on regularly distributed points, was used supplemented with points near break-lines in the terrain. An evaluation of surfaces created with three different interpolation methods at three different resolutions shows that the statistical distribution was better when using points as opposed to contours, and that the accuracy was comparable despite the much smaller amount of input data.     

Epistemological dimensions of the water–energy–food nexus approach: reply to discussions of “Challenges in operationalizing the water–energy–food nexus”*

ABSTRACT

We thank the authors, Varis and Keskinen, and Nauditt, for their constructive contributions. We endorse their key comments, further referring to recent literature and events, including the UN 2018 High Level Political Forum on sustainable development. Here, we elaborate on the epistemological perspective of the water–energy–food nexus conceptualization, assessment, discourse and operationalization.     

测量学实践教学的改革与实践

测量学是一门技术性和实践性很强的专业基础课,实践教学是整个教学过程中的重要环节。近几年来,测绘工程系以土木工程等6个本科专业为试点,从更新实践教学内容和教学方法、加强实践教学基础条件建设、创新实践教学考核评价方法等方面进行了系统的研究和大胆的改革,建立与完善了一套完整的测量学实践教学体系,在培养学生的合作精神和动手能力方面收到了良好效果。     

数字柳州地理空间框架应用推广探索与实践

地理空间框架是数字城市乃至智慧城市建设的重要基础,其应用推广的好坏关系到系统能否长效运行,是重中之重。本文以数字柳州地理空间框架为例,分析应用推广的现状与存在的问题,探索应用推广的模式,总结应用推广的内容与方法,并结合柳州实际情况进行了实践,搭建了教育学区专题应用、存量房价格认证服务平台、人口电子地图管理系统、三维土地供应系统,并与数字化城市管理系统实现了对接,同时在公众网搭建了地理信息公众服务系统。     

Harveys and Walking Maps

Abstract

Geographical information is connected to everyday life in many ways. Web cartography has made geospatial data more available to the public. In the next few years, the average age of the population will be over 51 years, with more than 15% of the population over the age of 65 years. The fact that the senior population is increasing suggests that online mapping and map viewer design should be aware of the senior population’s visual restrictions, as well as restrictions of other potential map users, including colour-vision-impaired users. This paper describes the senior population’s visual restrictions that can be compared with colour-vision-impaired users and provides guidelines with regard to online mapping and map viewer design for this growing segment of the elderly population.     

旅游区划分在省级旅游地图中的应用实践

旅游地图是旅游业与旅游者认识空间的重要工具。随着旅游业的兴旺,旅游人口不断增加,旅游者的文化素质也在不断的提升,需要有更好品质的地图以满足其日益增长的需要,旅游地图的编制面临着空前的挑战。本文以黑龙江省旅游地图为例,根据省级旅游地图表示内容要求和设计中存在的问题,通过对旅游区的定义、划分原则和黑龙江省旅游图中的划分实践,为省级旅游图设计提供一个新的思路。     

Motion of animated streamlets appears to surpass their graphical alterations in human visual detection of vector field maxima

ABSTRACT

Animations have become a frequently utilized illustration technique on maps but changes in their graphical loading remain understudied in empirical geovisualization and cartographic research. Animated streamlets have gained attention as an illustrative animation technique and have become popular on widely viewed maps. We conducted an experiment to investigate how altering four major animation parameters of animated streamlets affects people’s reading performance of field maxima on vector fields. The study involved 73 participants who performed reaction-time tasks on pointing maxima on vector field stimuli. Reaction times and correctness of answers changed surprisingly little between visually different animations, with only a few occasional statistical significances. The results suggest that motion of animated streamlets is such a strong visual cue that altering graphical parameters makes only little difference when searching for the maxima. This leads to the conclusion that, for this kind of a task, animated streamlets on maps can be designed relatively freely in graphical terms and their style fitted to other contents of the map. In the broader visual and geovisual analytics context, the results can lead to more generally hypothesizing that graphical loading of animations with continuous motion flux could be altered without severely affecting their communicative power.     

电法在秦岭钼多金属矿区找盲应用

本文以电法在秦岭某钼多金属矿区寻找深部盲矿的应用为例,介绍了电法勘查方法应用效果,说明物探资料在地球物理前提条件具备时,可以为矿区设计和开发生产过程提供重要的信息和依据,在相似地区深部找矿和寻找盲矿体具有一定借鉴意义。     

重磁三维自动反演软件系统的分析与设计

由于三维反演计算非常耗时,导致目前的重磁三维自动反演系统的工作方式效率低。为了改善工作效率和提高反演结果的质量,提出实时可视化自动反演方式,设计并开发了一个重磁三维实时可视化反演系统。该系统在三维反演计算的过程中,将中间反演结果同时进行成图可视化,使得工作人员能及时分析和评价中间反演结果并能修改参数,以此来介入和引导复杂的反演过程,快速有效地得到比较理想的反演结果。该系统具有实时性、交互性和引导性特点。对该系统进行了分析和设计,并给出了其中的关键技术与设计方案。