Bernhard Jenny
Biographic Data
| ID | 6745965 |
|---|---|
| NAME | Bernhard Jenny |
| GIVEN NAMES | Bernhard |
| FAMILY NAME | Jenny |
| SIGNATURE | JENNY B |
| AFFILIATIONS | Oregon State University |
| ORCID | 0000-0001-6101-6100 |
| VERIFIED | Yes |
| TOTAL WORKS | 27 |
| TOTAL CITATIONS | 21 |
| AUTHOR COUNT | 27 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
Ring maps: Simplified, egocentric, and topology-preserving views for augmented reality navigation
We introduce ring maps, a new augmented reality (AR) mapping paradigm that supports pedestrian navigation in urban environments while balancing map complexity, environmental occlusion, and spatial awareness. Ring maps position landmark symbols in a circular layout around the viewer based on direction and distance. We situate ring maps alongside other AR map types in a design space that considers cartographic generalization, anchoring, and planime…
Proxemic maps for immersive visualization
In human computer interaction, proxemics describes the ways that people use space to interact with other people or objects. We focus on proxemic maps, which are virtual maps in immersive environments that react to proxemic interaction. Proxemic maps take advantage of new opportunities brought about by immersive visualization, where virtual maps can be freely positioned in virtual or physical space and adapt themselves relative to the spatial posi…
Embodied gesture interaction for immersive maps
With the increasing availability of head-mounted displays for virtual reality and augmented reality, we can create immersive maps in which the user is closer to the data. Embodiment is a key concept, allowing the user to act upon virtual objects in an immersive environment. Our work explores the use of embodied interaction for immersive maps. We propose four design considerations for embodied maps and embodied gesture interaction with immersive m…
Barapa Country through Barapa eyes: Cultural mapping of Gunbower Island, Australia
The Gunbower Yemurriki Map details important information about Barapa Country and Barapa people for the purpose of education. The Barapa are the Traditional Owners of the lands north and south of the Murray River around Cohuna, Australia and are working with natural resource agencies to identify and map cultural assets on traditional lands, particularly in relation to water resources. The Gunbower Yemurriki Map has been developed through particip…
Terrain generalization with line integral convolution
Line integral convolution is a technique originally developed for visualizing vector fields, such as wind or water directions, that places densely packed lines following the direction of movement. Geisthövel and Hurni adapted line integral convolution to terrain generalization in 2018. Their method successfully removes details and retains sharp mountain ridges; it is particularly suited for creating generalized shaded relief. This paper extends l…
Aerial perspective for shaded relief
Aerial perspective is an essential design principle for shaded relief that emphasizes high elevation terrain using strong luminance contrast and low elevations with low contrast. Aerial perspective results in a more expressive shaded relief and helps the reader to understand the structure of a landscape more easily. We introduce a simple yet effective method for adding aerial perspective to shaded relief that is easy to control by the mapmaker
Immersive visualization with bar graphics
Augmented reality (AR) enables the creation of immersive situated visualizations. These visualizations blend with the real world so that the user perceives the virtual objects as physically present. We propose two novel immersive situated visualizations for geospatial quantitative point data that link AR bar graphics in the real environment with a virtual AR chart or map. The Egocentric Bar Chart combines virtual bars placed in a real landscape w…
Elicitation study investigating hand and foot gesture interaction for immersive maps in augmented reality
Immersive maps in augmented reality (AR) are virtual maps that plausibly blend with the physical environment, such that the user perceives them as a part of the real world. While immersive maps can offer unprecedented engaging experiences, the way to perform panning, zooming and other basic map interaction is not obvious. This limitation may hamper widespread adoption of immersive maps. We therefore conducted an elicitation study to identify comm…
Elevation models for reproducible evaluation of terrain representation
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 techniques across different scales and landscapes. We introduce elevation models of varying terrain types, available to the user at no cost, with minimal common data imperfections such as missing data values, resampling artifacts, and seams. Three multisca…
Automated layout of origin–destination flow maps: U.S. county-to-county migration 2009–2013
Visualizing large movement datasets with flow maps is difficult because overlapping flows create significant graphical conflicts that make accurate interpretation difficult or impossible. Interactive flow mapping applications allow users to explore large movement datasets by automatically generating flow maps from subsets of the data in response to queries by the user. However, even a small number of flows can overlap and cross each other in a wa…
Enhancing adaptive composite map projections: Wagner transformation between the Lambert azimuthal and the transverse cylindrical equal-area projections
The adaptive composite map projection technique changes the projection to minimize distortion for the geographic area shown on a map. This article improves the transition between the Lambert azimuthal projection and the transverse equal-area cylindrical projection that are used by adaptive composite projections for portrait-format maps. Originally, a transverse Albers conic projection was suggested for transforming between these two projections, …
Estimated travel time of mudflows at Mount Hood, Oregon
Volcanic hazard maps are used to inform planners, policy-makers, and the public of the areas potentially impacted by volcanic hazards. We describe the design and production of a three-dimensional (3D) volcanic hazard map showing lahar travel times at Mount Hood, Oregon. The creation of this map involved the application of innovative techniques, including (a) an analytical model for computing lahar travel time isochrones; (b) a terrain tiling syst…
Interactive video maps: A year in the life of Earth's CO 2
This article introduces interactive video maps for the web. The main component of video maps is a video stream that is areally georeferenced to a spatial reference system in the same way rectified raster orthoimages are georeferenced. The areal georeference allows for interactivity that goes beyond the play, pause, and stop functionality of video player software. We highlight two types of functionality, allowing the user to (1) combine the video …
A computational method for the Hufnagel pseudocylindric map projection family
In 1989, Herbert Hufnagel introduced a mathematical model for a family of equal-area, pseudocylindric projections that includes the Mollweide, Wagner IV, and Eckert IV projections as specializations. Hufnagel's contribution has received very little attention, and his projections are not available in any of the commonly used cartographic software packages. This article makes three contributions: The Hufnagel family is introduced to the English-spe…
Design principles for origin-destination flow maps
Origin-destination flow maps are often difficult to read due to overlapping flows. Cartographers have developed design principles in manual cartography for origin-destination flow maps to reduce overlaps and increase readability. These design principles are identified and documented using a quantitative content analysis of 97 geographic origin-destination flow maps without branching or merging flows. The effectiveness of selected design principle…
E-book atlases for tablet computers: The Atlas of the Columbia River Basin
More e-books than traditional paper books are sold today, and tablet computers have become ubiquitous in recent years. Digital cartographic atlases have replaced traditional paper atlases, but cartographers have not yet fully embraced the potential of multi-touch tablet computers, such as the iPad. This article explores the characteristics of e-book atlases, which are positioned between traditional printed atlases and digital atlas information sy…
User preferences for world map projections
Many small-scale map projections exist, and they have different shapes and distortion characteristics. World map projections are mainly chosen based on their distortion properties and the personal preferences of cartographers. Very little is known about the map projection preferences of map-readers; only two studies have addressed this question so far. This article presents a user study among map-readers and trained cartographers that tests their…
Plan oblique relief for web maps
Plan oblique relief shows terrain with a side view on a two-dimensional map, resulting in visualizations where the third dimension of the terrain is more explicit than on traditional two-dimensional maps. Existing plan oblique maps are static: the angle of terrain inclination is not adjustable and the orientation of plan oblique inclination does not change with the orientation of the map. This article introduces two complementary methods that add…
Challenges in adapting example-based texture synthesis for panoramic map creation: A case study
Panoramic hiking and skiing maps are popular among tourists and map collectors. Such three-dimensional (3D) maps allow for easy orientation and provide the observer with an immersive impression of the landscape to be discovered or remembered. The most impressive panoramic masterpieces are almost exclusively painted manually or with minor digital tool support. Software packages that allow modern cartographers to create 3D maps of comparable visual…
Blending world map projections with Flex Projector
The idea of designing a new map projection via combination of two projections is well established. Some of the most popular world map projections in use today were devised in this manner. One construction method is to combine two source projections along a common parallel; a second method calculates the arithmetic means of two projections. These two methods for creating new world map projections are included in the latest version of Flex Projecto…
Terrain Generalization with Multi-scale Pyramids Constrained by Curvature
This paper presents a method for terrain generalization using Laplacian pyramids. The method pre-processes digital terrain for generating cartographically generalized 3D maps. Map authors can attenuated or amplify selected frequency bands of the terrain with a graphical interface imitating an audio equalizer. Ridge lines and valley lines are localized by curvature indices, and their characteristic shapes are preserved or emphasized using addition…
Automated Reduction of Visual Complexity in Small-Scale Relief Shading
Shaded relief derived automatically from digital elevation models differs distinctly from traditional manual shading. Particularly at small scales, many small topographic details that are present in terrain models disturb the clear portrayal of the main relief features. Automatic shading is therefore not appropriate for high-quality cartographic products. This paper proposes a new method of generalizing digital elevation models for deriving small…
Self-Adjusting Legends for Proportional Symbol Maps
A Cartometric Analysis of the Terrain Models of Joachim Eugen Müller (1752–1833) Using Non-contact 3D Digitizing and Visualization Techniques
This article assesses the accuracy of the terrain models of Joachim Eugen Müller (1752–1833) in relation to modern digital elevation data using non-contact 3D digitizing techniques. The results are objective testimony to the skill and endeavour of Joachim Eugen Müller. Using techniques primitive by modern standards, Müller provided Johann Henry Weiss (1758–1826) with data of hitherto unparalleled quality that were essential to the production of t…
Visualizing the Planimetric Accuracy of Historical Maps with MapAnalyst
MapAnalyst is a new software application for the visualization and study of the planimetric accuracy of old maps. It illustrates local map distortion by generating distortion grids, displacement vectors, and new isolines of scale and rotation. MapAnalyst additionally computes the old map's scale and rotation, as well as statistical indicators summarizing the map's geometric accuracy. It offers a user-friendly interface and is freely available for…
Design principles for origin-destination flow maps
Origin-destination flow maps are often difficult to read due to overlapping flows. Cartographers have developed design principles in manual cartography for origin-destination flow maps to reduce overlaps and increase readability. These design principles are identified and documented using a quantitative content analysis of 97 geographic origin-destination flow maps without branching or merging flows. The effectiveness of selected design principle…
Elicitation study investigating hand and foot gesture interaction for immersive maps in augmented reality
Immersive maps in augmented reality (AR) are virtual maps that plausibly blend with the physical environment, such that the user perceives them as a part of the real world. While immersive maps can offer unprecedented engaging experiences, the way to perform panning, zooming and other basic map interaction is not obvious. This limitation may hamper widespread adoption of immersive maps. We therefore conducted an elicitation study to identify comm…
Elevation models for reproducible evaluation of terrain representation
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 techniques across different scales and landscapes. We introduce elevation models of varying terrain types, available to the user at no cost, with minimal common data imperfections such as missing data values, resampling artifacts, and seams. Three multisca…
Aerial perspective for shaded relief
Aerial perspective is an essential design principle for shaded relief that emphasizes high elevation terrain using strong luminance contrast and low elevations with low contrast. Aerial perspective results in a more expressive shaded relief and helps the reader to understand the structure of a landscape more easily. We introduce a simple yet effective method for adding aerial perspective to shaded relief that is easy to control by the mapmaker
Immersive visualization with bar graphics
Augmented reality (AR) enables the creation of immersive situated visualizations. These visualizations blend with the real world so that the user perceives the virtual objects as physically present. We propose two novel immersive situated visualizations for geospatial quantitative point data that link AR bar graphics in the real environment with a virtual AR chart or map. The Egocentric Bar Chart combines virtual bars placed in a real landscape w…
Enhancing adaptive composite map projections: Wagner transformation between the Lambert azimuthal and the transverse cylindrical equal-area projections
The adaptive composite map projection technique changes the projection to minimize distortion for the geographic area shown on a map. This article improves the transition between the Lambert azimuthal projection and the transverse equal-area cylindrical projection that are used by adaptive composite projections for portrait-format maps. Originally, a transverse Albers conic projection was suggested for transforming between these two projections, …
User preferences for world map projections
Many small-scale map projections exist, and they have different shapes and distortion characteristics. World map projections are mainly chosen based on their distortion properties and the personal preferences of cartographers. Very little is known about the map projection preferences of map-readers; only two studies have addressed this question so far. This article presents a user study among map-readers and trained cartographers that tests their…
Terrain Generalization with Multi-scale Pyramids Constrained by Curvature
This paper presents a method for terrain generalization using Laplacian pyramids. The method pre-processes digital terrain for generating cartographically generalized 3D maps. Map authors can attenuated or amplify selected frequency bands of the terrain with a graphical interface imitating an audio equalizer. Ridge lines and valley lines are localized by curvature indices, and their characteristic shapes are preserved or emphasized using addition…
An Interactive Approach to Analytical Relief Shading
The software currently available for analytical relief shading does not generally permit local adaptations of the light direction, the simulation of aerial perspective, and other necessary techniques developed for manual relief shading. To remedy this deficiency, a program for computer-assisted relief shading has been developed that allows users to locally adapt shading characteristics, permitting seamless interactive control over the entire proc…
Modular Web-Based Atlas Information Systems
Atlas information systems (AIS) present spatial information on predefined themes and localities in the form of maps and other representations, generally focusing on correct cartographic appearance and offering a certain degree of user interaction. This article introduces the concept of modular AIS, a concept that is essential for the development of an AIS with modern computer technology. The main advantages of a modular architecture are twofold: …
Visualizing the Planimetric Accuracy of Historical Maps with MapAnalyst
MapAnalyst is a new software application for the visualization and study of the planimetric accuracy of old maps. It illustrates local map distortion by generating distortion grids, displacement vectors, and new isolines of scale and rotation. MapAnalyst additionally computes the old map's scale and rotation, as well as statistical indicators summarizing the map's geometric accuracy. It offers a user-friendly interface and is freely available for…
Self-Adjusting Legends for Proportional Symbol Maps
A Cartometric Analysis of the Terrain Models of Joachim Eugen Müller (1752–1833) Using Non-contact 3D Digitizing and Visualization Techniques
This article assesses the accuracy of the terrain models of Joachim Eugen Müller (1752–1833) in relation to modern digital elevation data using non-contact 3D digitizing techniques. The results are objective testimony to the skill and endeavour of Joachim Eugen Müller. Using techniques primitive by modern standards, Müller provided Johann Henry Weiss (1758–1826) with data of hitherto unparalleled quality that were essential to the production of t…
Automated Reduction of Visual Complexity in Small-Scale Relief Shading
Shaded relief derived automatically from digital elevation models differs distinctly from traditional manual shading. Particularly at small scales, many small topographic details that are present in terrain models disturb the clear portrayal of the main relief features. Automatic shading is therefore not appropriate for high-quality cartographic products. This paper proposes a new method of generalizing digital elevation models for deriving small…
Terrain Generalization with Multi-scale Pyramids Constrained by Curvature
This paper presents a method for terrain generalization using Laplacian pyramids. The method pre-processes digital terrain for generating cartographically generalized 3D maps. Map authors can attenuated or amplify selected frequency bands of the terrain with a graphical interface imitating an audio equalizer. Ridge lines and valley lines are localized by curvature indices, and their characteristic shapes are preserved or emphasized using addition…
Challenges in adapting example-based texture synthesis for panoramic map creation: A case study
Panoramic hiking and skiing maps are popular among tourists and map collectors. Such three-dimensional (3D) maps allow for easy orientation and provide the observer with an immersive impression of the landscape to be discovered or remembered. The most impressive panoramic masterpieces are almost exclusively painted manually or with minor digital tool support. Software packages that allow modern cartographers to create 3D maps of comparable visual…
Blending world map projections with Flex Projector
The idea of designing a new map projection via combination of two projections is well established. Some of the most popular world map projections in use today were devised in this manner. One construction method is to combine two source projections along a common parallel; a second method calculates the arithmetic means of two projections. These two methods for creating new world map projections are included in the latest version of Flex Projecto…
E-book atlases for tablet computers: The Atlas of the Columbia River Basin
More e-books than traditional paper books are sold today, and tablet computers have become ubiquitous in recent years. Digital cartographic atlases have replaced traditional paper atlases, but cartographers have not yet fully embraced the potential of multi-touch tablet computers, such as the iPad. This article explores the characteristics of e-book atlases, which are positioned between traditional printed atlases and digital atlas information sy…
User preferences for world map projections
Many small-scale map projections exist, and they have different shapes and distortion characteristics. World map projections are mainly chosen based on their distortion properties and the personal preferences of cartographers. Very little is known about the map projection preferences of map-readers; only two studies have addressed this question so far. This article presents a user study among map-readers and trained cartographers that tests their…
Plan oblique relief for web maps
Plan oblique relief shows terrain with a side view on a two-dimensional map, resulting in visualizations where the third dimension of the terrain is more explicit than on traditional two-dimensional maps. Existing plan oblique maps are static: the angle of terrain inclination is not adjustable and the orientation of plan oblique inclination does not change with the orientation of the map. This article introduces two complementary methods that add…
Estimated travel time of mudflows at Mount Hood, Oregon
Volcanic hazard maps are used to inform planners, policy-makers, and the public of the areas potentially impacted by volcanic hazards. We describe the design and production of a three-dimensional (3D) volcanic hazard map showing lahar travel times at Mount Hood, Oregon. The creation of this map involved the application of innovative techniques, including (a) an analytical model for computing lahar travel time isochrones; (b) a terrain tiling syst…
Interactive video maps: A year in the life of Earth's CO 2
This article introduces interactive video maps for the web. The main component of video maps is a video stream that is areally georeferenced to a spatial reference system in the same way rectified raster orthoimages are georeferenced. The areal georeference allows for interactivity that goes beyond the play, pause, and stop functionality of video player software. We highlight two types of functionality, allowing the user to (1) combine the video …
A computational method for the Hufnagel pseudocylindric map projection family
In 1989, Herbert Hufnagel introduced a mathematical model for a family of equal-area, pseudocylindric projections that includes the Mollweide, Wagner IV, and Eckert IV projections as specializations. Hufnagel's contribution has received very little attention, and his projections are not available in any of the commonly used cartographic software packages. This article makes three contributions: The Hufnagel family is introduced to the English-spe…
Design principles for origin-destination flow maps
Origin-destination flow maps are often difficult to read due to overlapping flows. Cartographers have developed design principles in manual cartography for origin-destination flow maps to reduce overlaps and increase readability. These design principles are identified and documented using a quantitative content analysis of 97 geographic origin-destination flow maps without branching or merging flows. The effectiveness of selected design principle…
Automated layout of origin–destination flow maps: U.S. county-to-county migration 2009–2013
Visualizing large movement datasets with flow maps is difficult because overlapping flows create significant graphical conflicts that make accurate interpretation difficult or impossible. Interactive flow mapping applications allow users to explore large movement datasets by automatically generating flow maps from subsets of the data in response to queries by the user. However, even a small number of flows can overlap and cross each other in a wa…
Enhancing adaptive composite map projections: Wagner transformation between the Lambert azimuthal and the transverse cylindrical equal-area projections
The adaptive composite map projection technique changes the projection to minimize distortion for the geographic area shown on a map. This article improves the transition between the Lambert azimuthal projection and the transverse equal-area cylindrical projection that are used by adaptive composite projections for portrait-format maps. Originally, a transverse Albers conic projection was suggested for transforming between these two projections, …
Barapa Country through Barapa eyes: Cultural mapping of Gunbower Island, Australia
The Gunbower Yemurriki Map details important information about Barapa Country and Barapa people for the purpose of education. The Barapa are the Traditional Owners of the lands north and south of the Murray River around Cohuna, Australia and are working with natural resource agencies to identify and map cultural assets on traditional lands, particularly in relation to water resources. The Gunbower Yemurriki Map has been developed through particip…
Terrain generalization with line integral convolution
Line integral convolution is a technique originally developed for visualizing vector fields, such as wind or water directions, that places densely packed lines following the direction of movement. Geisthövel and Hurni adapted line integral convolution to terrain generalization in 2018. Their method successfully removes details and retains sharp mountain ridges; it is particularly suited for creating generalized shaded relief. This paper extends l…
Aerial perspective for shaded relief
Aerial perspective is an essential design principle for shaded relief that emphasizes high elevation terrain using strong luminance contrast and low elevations with low contrast. Aerial perspective results in a more expressive shaded relief and helps the reader to understand the structure of a landscape more easily. We introduce a simple yet effective method for adding aerial perspective to shaded relief that is easy to control by the mapmaker
Immersive visualization with bar graphics
Augmented reality (AR) enables the creation of immersive situated visualizations. These visualizations blend with the real world so that the user perceives the virtual objects as physically present. We propose two novel immersive situated visualizations for geospatial quantitative point data that link AR bar graphics in the real environment with a virtual AR chart or map. The Egocentric Bar Chart combines virtual bars placed in a real landscape w…
Elicitation study investigating hand and foot gesture interaction for immersive maps in augmented reality
Immersive maps in augmented reality (AR) are virtual maps that plausibly blend with the physical environment, such that the user perceives them as a part of the real world. While immersive maps can offer unprecedented engaging experiences, the way to perform panning, zooming and other basic map interaction is not obvious. This limitation may hamper widespread adoption of immersive maps. We therefore conducted an elicitation study to identify comm…
Elevation models for reproducible evaluation of terrain representation
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 techniques across different scales and landscapes. We introduce elevation models of varying terrain types, available to the user at no cost, with minimal common data imperfections such as missing data values, resampling artifacts, and seams. Three multisca…
Embodied gesture interaction for immersive maps
With the increasing availability of head-mounted displays for virtual reality and augmented reality, we can create immersive maps in which the user is closer to the data. Embodiment is a key concept, allowing the user to act upon virtual objects in an immersive environment. Our work explores the use of embodied interaction for immersive maps. We propose four design considerations for embodied maps and embodied gesture interaction with immersive m…
Computer Science (23 works) · Geography (17 works) · Cartography (16 works) · Artificial Intelligence (14 works) · Mathematics (12 works) · Geographic Information Systems Studies (11 works) · Computer graphics (images (10 works) · Terrain (9 works) · Computer vision (8 works) · Geology (8 works)