Digital Cartography

2021 ◽  
pp. 327-354
Author(s):  
Qun Sun ◽  
Haiyan Liu
Keyword(s):  
Digital Cartography

scholarly journals Making progress in determining quality: positional accuracy of the new 1:25,000 scale digital cartography

2021 ◽  
Vol 4 ◽  
pp. 1-5
Author(s):  
Bárbara Cubillos ◽  
Ángela Ortíz ◽  
Germán Aguilera ◽  
Sergio Rozas ◽  
Claudio Reyes ◽  
...  
Keyword(s):  
Data Model ◽  
Early Stage ◽  
International Standards ◽  
Positional Accuracy ◽  
Intelligence Agency ◽  
Digital Cartography ◽  
Data Store ◽  
The Military

Abstract. The digital cartographic coverage at 1:25,000 that the Military Geographic Institute is creating has been worked on using international standards, so that it constitutes a standardized and interoperable tool, for the various areas of activity in Chile. In this context, the ISO TC 211 standards and the TDS (Topographic Data Store) data model developed by the National Geospatial-Intelligence Agency (NGA) are being used.Apart from using these standards, efforts have been aimed, from an early stage, at the determination of the quality of this product, starting this process with the study for a methodology to measure Positional Accuracy. The method defined conforms to the NSSDA test; for this, points measured in the terrain especially for this control are used, also the elimination of points that are out of range under the Chauvenet Criteria. Finally, the positional accuracy is declared in the metadata.

scholarly journals The importance of computational geometry for digital cartography

2008 ◽  
Vol 3 ◽  
pp. 15-24
Author(s):  
Tomáš Bayer
Keyword(s):  
Computational Geometry ◽  
Convex Hull ◽  
Time Complexity ◽  
Geometric Structures ◽  
Digital Cartography ◽  
Relationship Of ◽  
The Relationship

This paper describes the use of computational geometry concepts in the digital cartography.  It presents an importance of 2D geometric structures, geometric operations and procedures for automated or semi automated simplification process. This article is focused on automated building simplification procedures, some techniques are illustrated and discussed. Concrete examples with the requirements to the lowest time complexity, emphasis on the smallest area enclosing rectangle, convex hull or self intersection procedures, are given. Presented results illustrate the relationship of digital cartography and computational geometry.

Eliminating white spots

2021 ◽  
Vol 14 (37) ◽  
pp. 62-104
Author(s):  
Lana Moraes ◽  
Carlos Carvalho ◽  
Manoel Rendeiro ◽  
Tiago Gil
Keyword(s):  
South America ◽  
Theoretical Framework ◽  
Critical Cartography ◽  
Visual Vocabulary ◽  
Digital Cartography ◽  
White Spots ◽  
Relative Selectivity

This article reflects on the construction of Curt Nimuendajú's “Ethno-historical map”, an exhaustive work that sought to map the native groups of South America. This map was one of the most widely-used representations by researchers since its creation in 1944. The theoretical framework adopted in this paper stresses maps as rhetorical constructs that should be read as texts. The article also discusses the limits and possibilities of a visual vocabulary to understand explicit and implicit theoretical and methodological decisions in cartography. Digital cartography will be employed to bring out the differences between what the author of the project intended and what was presented in the "Ethno-historical map".  The text starts with a description of the work and its most evident options, showing a relative selectivity in Nimuendajú's choices. In the last part, technical procedures will be abandoned to interpret the results considering the new critical cartography and ethno-geography positions.

scholarly journals Mapping the Beach Beneath the Street: Digital Cartography for the Playable City

2016 ◽  
pp. 137-162 ◽  
Author(s):  
Paul Coulton ◽  
Jonny Huck ◽  
Adrian Gradinar ◽  
Lara Salinas
Keyword(s):  
Digital Cartography

scholarly journals Algorithmic Surveillance in the Gig Economy: The Organization of Work through Lefebvrian Conceived Space

2020 ◽  
pp. 017084062093790 ◽  
Author(s):  
Gemma Newlands
Keyword(s):  
Food Delivery ◽  
Power Dynamics ◽  
Human Observer ◽  
Lived Space ◽  
Human Agent ◽  
Digital Cartography ◽  
Gig Economy ◽  
Dyadic Process ◽  
Organisational Research ◽  
Workplace Surveillance

Workplace surveillance is traditionally conceived of as a dyadic process, with an observer and an observee. In this paper, I discuss the implications of an emerging form of workplace surveillance: surveillance with an algorithmic, as opposed to human, observer. Situated within the on-demand food-delivery context, I draw upon Henri Lefebvre’s spatial triad to provide in-depth conceptual examination of how platforms rely on conceived space, namely the virtual reality generated by data capture, while neglecting perceived and lived space in the form of the material embodied reality of workers. This paper offers a two-fold contribution. First, it applies Henri Lefebvre’s spatial triad to the techno-centric digital cartography used by platform-mediated organisations, assessing spatial power dynamics and opportunities for resistance. Second, this paper advances organisational research into workplace surveillance in situations where the observer and decision-maker can be a non-human agent.

Path Planning in Outdoor Pedestrian Settings Using 2D Digital Maps

2019 ◽  
Vol 31 (3) ◽  
pp. 464-473 ◽  
Author(s):  
Ahmed Farid ◽  
◽  
Takafumi Matsumaru
Keyword(s):  
Rural Areas ◽  
Continuous Monitoring ◽  
Current Knowledge ◽  
Continuous Process ◽  
Global Scale ◽  
Contour Detection ◽  
Digital Maps ◽  
Digital Cartography ◽  
Localization And Mapping ◽  
Recorded Data

In this article, a framework for planning sidewalk-wise paths in data-limited pedestrian environments is presented by visually recognizing city blocks in 2D digital maps (e.g., Google Maps, and OpenStreet Maps) using contour detection, and by then applying graph theory to infer a pedestrian path from start to finish. Two main problems have been identified; first, several locations worldwide (e.g., suburban / rural areas) lack recorded data on street crossings and pedestrian walkways. Second, the continuous process of recording maps (i.e., digital cartography) is, to our current knowledge, manual and has not yet been fully automated in practice. Both issues contribute toward a scaling problem, in which the continuous monitoring and recording of such data at a global scale becomes time and effort consuming. As a result, the purpose of this framework is to produce path plans that do not depend on pre-recorded (e.g., using simultaneous localization and mapping (SLAM)) or data-rich pedestrian maps, thus facilitating navigation for mobile robots and people with visual impairment. Assuming that all roads are crossable, the framework was able to produce pedestrian paths for most locations where data on sidewalks and street crossings were indeed limited at 75% accuracy in our test-set, but certain challenges still remain to attain higher accuracy and to match real-world settings. Additionally, we describe certain works in the literature that describe how to utilize such path plans effectively.

Legal Issues in Mapping Traditional Knowledge: Digital Cartography in the Canadian North

2013 ◽  
Vol 52 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Teresa Scassa ◽  
Nate J. Engler ◽  
D. R. Fraser Taylor
Keyword(s):  
Traditional Knowledge ◽  
Legal Issues ◽  
Canadian North ◽  
Digital Cartography
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