Cartographic Relief Presentation

This paper proposes elevation models to promote, evaluate, and compare various terrain representation techniques. Our goal is to increase the reproducibility of terrain rendering algorithms and tec...

Elevation models for reproducible evaluation of terrain representation

Graphic interfaces of geoportals allow visualizing and overlaying various (visually) heterogeneous geographical data, often by image blending: vector data, maps, aerial imagery, Digital Terrain Model, etc. Map design and geo-visualization may benefit from methods and tools to hybrid, i.e. visually integrate, heterogeneous geographical data and cartographic representations. In this paper, we aim at designing continuous hybrid visualizations between ortho-imagery and symbolized vector data, in order to control a particular visual property, i.e. the photo-realism perception. The natural appearance (colors, textures) and various texture effects are used to drive the control the photo-realism level of the visualization: color and texture interpolation blocks have been developed. We present a global design method that allows to manipulate the behavior of those interpolation blocks on each type of geographical layer, in various ways, in order to provide various cartographic continua.

Cartographic continuum rendering based on color and texture interpolation to enhance photo-realism perception

Supplementary contour lines are placed between regular contour lines to visualize small but important forms that regular contour lines are unable to show. On topographic maps, typical forms are hil...

Automated placement of supplementary contour lines

Obesity is nowadays a major global health problem. Every year amount of obese (BMI > 30 kg . m) and overweight (BMI > 25 kg . m) people increases. Obesity is not just a cosmetic problem, but it leads to many serious he alt complications, particularly cardiovascular diseases, metabolic diseases etc. We can define obe sity as an excessive amount of body fat. The development of obesity is often influenced by energ y intake, which overrides the energy expenditure. Many studies are currently describe th e influence of various substances that could potentially act as antiobesity drugs. Peptide hormo nes, which are engaged in this work, can be divided to the long-term (leptin, insulin, ghrelin) and short-term (e.g. cholecystokinin, glucagon lik e peptide 1, peptide YY, CART peptides, melanocortin system, neuropeptide Y and melanin concentrating hormone) acting. Peptides can be also divided according to their effect on food intake to the anorexigenic and orexigenic. Anorexigenic pe ptid s reduce food intake, orexigenic do the reverse.

Univerzita karlova v praze přírodovědecká fakulta

Swiss-style rock drawing uses shaded hachures to show the characteristic forms and the third dimension of rocks and cliffs. Rock faces, trenches, gullies, faults and other rock features relevant for orientation and navigation in mountainous areas are shown as seen from the ground instead of from an orthogonal perspective. The density and dimensions of hachures change with the exposure to a source of illumination to generate a shading effect that highlights the terrain’s three-dimensionality. The generation of rock drawings in Swiss style is time-intensive and requires an eye for the artistic rendering of the terrain’s third dimension as well as an understanding of different rock types and their morphology. Design principles have not yet been documented in a detailed and comprehensive manner and only rudimentary algorithms exist for the digital generation of simplified representations. This paper discusses the defining characteristics and specific design principles of Swiss-style rock drawing based...

Design principles for Swiss-style rock drawing

Rock depiction in Swiss topographic maps has evolved from humble line drawings into expressive renderings indicating slope, aspect and traversability. In this paper, an automatic method to derive m...

Automated Swiss-Style Relief Shading and Rock Hachuring

An automatic method for cartographic rock depiction on elevation grids is presented. The grid is generalized using line integral convolution, aggregating faces and enhancing edges. The generalized grid is hillshaded by applying a novel approach based on Poisson editing. The shaded relief is used in texturing the terrain with rock hachures.

Automatic rock depiction via relief shading

This papers describes first the history of mapping and cartographic depiction of Mount Everest, the highest peak in the world. The quality of the map and geodata of the area has significantly increased over the last hundred years. It may now serve as a precise source to derive educational maps, such as the Everest map in the SWISS WORLD ATLAS, the Swiss school atlas. We first describe the history of mapping Mount Everest and then the production steps for the new atlas map, with a special focus on terrain representation (relief, rock depiction).

Re-mapping the cliffs of Mount Everest: Deriving a synoptic map from large-scale mountain map data

The maps of the Federal Office of Topography swisstopo - the Swiss national mapping agency - are renowned for their combination of shaded relief, contour lines, scree rendering and rock drawing, which creates the so-called Swiss style of topographic mapping. During the era of analogue map production, rock drawing was executed with scribing on coated glass plates. With the ongoing computerization of cartography, swisstopo switched to a digital production line a few years ago. However, high-quality Swissstyle rock drawing for topographic maps is still a very labor-intensive process. At swisstopo, revisions to rock representations are carried out using interactive mouse-based drawing tools, as automated procedures do not currently exist. The Federal Office of Topography swisstopo and the Institute of Cartography of ETH Zurich therefore carry out a joint study to evaluate the potential of digital techniques for automating rock drawing. The first step of this project is a detailed study of the current manually drawn rock depiction, including design principles and geometric dimensions. This paper discusses current mousebased drawing techniques applied by swisstopo for their official map series and then shortly describes the graphical design principles for Swiss-style rock drawing. Metrics for individual rock hachures are included.

Roman Geisthövel

Papers

Design principles for Swiss-style rock drawing

Automated Swiss-Style Relief Shading and Rock Hachuring

Automatic rock depiction via relief shading

Re-mapping the cliffs of Mount Everest: Deriving a synoptic map from large-scale mountain map data

Rock drawing for topographic maps