L Hurni
Biographic Data
| ID | 25621 |
|---|---|
| NAME | L Hurni |
| GIVEN NAMES | L |
| FAMILY NAME | Hurni |
| SIGNATURE | HURNI L |
| AFFILIATIONS | ETH Zurich |
| ORCID | 0000-0002-0453-8743 |
| VERIFIED | Yes |
| TOTAL WORKS | 25 |
| TOTAL CITATIONS | 5 |
| AUTHOR COUNT | 25 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Climate Change Maps for the Atlas of Switzerland
Climate change has global consequences, and Switzerland is no exception. The communication of climate change poses various challenges, and maps are often part of this process. This work presents three maps illustrating the impacts of climate change, developed for the Atlas of Switzerland (AoS), an interactive digital national atlas. The aim is to make climate change impacts understandable and visible. Three different indicators of climate change …
Archetypes of settlement development on the Swiss Plateau: Identification, description and prediction
Scale- and Resolution-Adapted Shaded Relief Generation Using U-Net
On many maps, relief shading is one of the most significant graphical elements. Modern relief shading techniques include neural networks. To generate such shading automatically at an arbitrary scale, one needs to consider how the resolution of the input digital elevation model (DEM) relates to the neural network process and the maps used for training. Currently, there is no clear guidance on which DEM resolution to use to generate relief shading …
A novel framework for road vectorization and classification from historical maps based on deep learning and symbol painting
Road networks in the past are imperative for understanding evolution of transportation infrastructure, urban sprawl, and route planning, etc. Various approaches have been developed for road extraction from historical maps, among which deep learning techniques stand out as the most effective ones. However, little attention has been paid to investigating road vectorization and classification from historical maps. Moreover, road classification via m…
Inferring implicit 3D representations from human figures on pictorial maps
In this work, we present an automated workflow to bring human figures, one of the most frequently appearing entities on pictorial maps, to the third dimension. Our workflow is based on training data and neural networks for single-view 3D reconstruction of real humans from photos. We first let a network consisting of fully connected layers estimate the depth coordinate of 2D pose points. The gained 3D pose points are inputted together with 2D mask…
Terrain Segmentation Using a U-Net for Improved Relief Shading
Since landforms composing land surface vary in their properties and appearance, their shaded reliefs also present different visual impression of the terrain. In this work, we adapt a U-Net so that it can recognize a selection of landforms and can segment terrain. We test the efficiency of 10 separate models and apply an ensemble approach, where all the models are combined to potentially outperform single models. Our algorithm works particularly w…
Comparison of Relief Shading Techniques Applied to Landforms
As relief influences disposition of all the other objects displayed on maps, terrain representation plays one of the key roles in the map creation process. Originally a manual technique, relief shading creates the three-dimensional effect and allows the user to read the terrain in an intuitive way. With the advent of digital elevation models (DEMs) analytical relief shading came into a wider use, since it is faster, requires less effort, and deli…
Smart Cartographic Functionality for Improving Data Visualization in Map Mashups
Thanks to the growth of geoportal products and online cartographic platforms, access to spatial data has never been so easy for so many people. But access to cartographic knowledge for laypersons using such data is lagging behind. Platforms that allow users to create map mashups from diverse data sources can lead to unsatisfactory cartographic visualization, which reduces the map's legibility and the usefulness of such functions. This article's f…
A Simulation and Visualization Environment for Spatiotemporal Disaster Risk Assessments of Network Infrastructures
Emerging methodologies for risk assessments of civil infrastructure networks require the coupling of several spatiotemporal models that need to be executed multiple times with varying parametrizations to account for model uncertainty and to investigate “what-if” scenarios. These requirements led to the development of a software environment to support the simulation process and the visual analysis of its results. The simulation engine component of…
Toward Dream Cartography: Mapping Dream Space and Content
The objective of dream cartography is to map dream content, that is, to develop new visualization methods and adapt existing ones as graphical means for an explorative dream analysis. We aim at modelling (i.e., disentangling), documenting, reuniting, and graphically depicting the dream space and other relevant psychological aspects of dreams in a meaningful but abstracted way. In this article we describe the proposed workflow for mapping dreams, …
Seventh ICA Mountain Cartography Workshop: Mountain Mapping and Geospatial Information Retrieval (Borsa, Maramures, Romania, 1–5 September 2010)
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…
Customized Visualization of Natural Hazards Assessment Results and Associated Uncertainties through Interactive Functionality
Communication of natural hazard assessment results is crucial to protect people and infrastructure from devastating impacts of extreme events. While hazard maps provide important information on potential impacts, their interpretation and the general knowledge exchange between stakeholders is often difficult. Web-based information systems contain the potential to support hazard management tasks by fast distribution and customization of hazard visu…
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
Real-Time Visualization in Operational Hydrology through Web-based Cartography
Early warning and monitoring activities in the field of natural hazard management are crucial in order to limit damage to life and property from extreme natural events. Decision makers in these fields, such as operational hydrologists, must be enabled to quickly and comprehensively assess an on-going situation, examine its details, and then take further actions based on the most current information available. The cartographic challenge is to deli…
Proposed Cartographic Design Principles for 3D Maps: A Contribution to an Extended Cartographic Theory
Today, the technical generation of modern perspective views (so-called 3D maps) for static, animated, and dynamic use is highly advanced. Nevertheless, aspects of the design of such views and of their impact on readers have rarely been investigated in cartographic research. The establishment of cartographic design principles is missing, to a large extent. Within the framework of a research project, propositions for such principles were derived by…
Sixth ICA Mountain Cartography Workshop, Lenk / Simmental, Switzerland, 11–15 February 2008
From 11 to 15 February 2008, the sixth edition of the traditional ICA Mountain Cartography Workshop took place in Switzerland for the first time. The workshops focused on mountain-related topographic and thematic aspects and their depiction on maps and related representations. Every second year since 1998, cartographers and representatives of other fields related to cartography and GIS (geology, natural hazards, tourism, biology, etc.) have met i…
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…
Extended Cartographic Interfaces for Open Distributed Processing
In recent years, cartographic Web applications have evolved from closed monolithic applications to open distributed systems in which real-time map rendering components and services play an important role. This progress has required new and flexible ways of defining map symbolization. The development of cartographic interfaces needed to describe the desired map output offers the means to extend current symbolization approaches and adapt the portra…
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: …
On the Design of Schematic Transport Maps
Schematic drawings of route directions are one of the most common forms of graphic communication. People make sketches to communicate geographical ideas, and professionally designed schematic maps give orientation to thousands of users of a public transport system. Creating a schematic map for representing a transport network may be seen as a straightforward task; however, the underlying design of such maps can be quite complex. Map designers app…
Journeys of discovery: From paper maps to explorative multimedia cartographic visualization : recent development in Swiss cartography
Digital Cliff Drawing for Topographic Maps: Traditional Representations by Means of New Technologies
On topographic mountain maps, cliff drawings are among map elements that are most difficult to produce. However, they belong to some of the most spectacular representations on maps. This paper gives a short historic overview of the development of cliff drawing and describes the most common styles of cliff representations. New techniques are presented in detail for the generation of simplified ridge-line representations in an entirely digital and …
Cartographic Representation of Glacial Phenomena: Historical and Recent Developments
With the first systematic exploration of glacial phenomena in the middle of the nineteenth century, glaciology became an independent science. In parallel, glacial structures and processes needed to be visualized cartographically. Such representations always reflect the then current states of the technology of glaciological data collection and of cartography. Already in the last century, well-designed and user-friendly glacier maps with a high inf…
Archetypes of settlement development on the Swiss Plateau: Identification, description and prediction
Inferring implicit 3D representations from human figures on pictorial maps
In this work, we present an automated workflow to bring human figures, one of the most frequently appearing entities on pictorial maps, to the third dimension. Our workflow is based on training data and neural networks for single-view 3D reconstruction of real humans from photos. We first let a network consisting of fully connected layers estimate the depth coordinate of 2D pose points. The gained 3D pose points are inputted together with 2D mask…
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…
Customized Visualization of Natural Hazards Assessment Results and Associated Uncertainties through Interactive Functionality
Communication of natural hazard assessment results is crucial to protect people and infrastructure from devastating impacts of extreme events. While hazard maps provide important information on potential impacts, their interpretation and the general knowledge exchange between stakeholders is often difficult. Web-based information systems contain the potential to support hazard management tasks by fast distribution and customization of hazard visu…
Digital Cliff Drawing for Topographic Maps: Traditional Representations by Means of New Technologies
On topographic mountain maps, cliff drawings are among map elements that are most difficult to produce. However, they belong to some of the most spectacular representations on maps. This paper gives a short historic overview of the development of cliff drawing and describes the most common styles of cliff representations. New techniques are presented in detail for the generation of simplified ridge-line representations in an entirely digital and …
Cartographic Representation of Glacial Phenomena: Historical and Recent Developments
With the first systematic exploration of glacial phenomena in the middle of the nineteenth century, glaciology became an independent science. In parallel, glacial structures and processes needed to be visualized cartographically. Such representations always reflect the then current states of the technology of glaciological data collection and of cartography. Already in the last century, well-designed and user-friendly glacier maps with a high inf…
Journeys of discovery: From paper maps to explorative multimedia cartographic visualization : recent development in Swiss cartography
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: …
On the Design of Schematic Transport Maps
Schematic drawings of route directions are one of the most common forms of graphic communication. People make sketches to communicate geographical ideas, and professionally designed schematic maps give orientation to thousands of users of a public transport system. Creating a schematic map for representing a transport network may be seen as a straightforward task; however, the underlying design of such maps can be quite complex. Map designers app…
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…
Extended Cartographic Interfaces for Open Distributed Processing
In recent years, cartographic Web applications have evolved from closed monolithic applications to open distributed systems in which real-time map rendering components and services play an important role. This progress has required new and flexible ways of defining map symbolization. The development of cartographic interfaces needed to describe the desired map output offers the means to extend current symbolization approaches and adapt the portra…
Proposed Cartographic Design Principles for 3D Maps: A Contribution to an Extended Cartographic Theory
Today, the technical generation of modern perspective views (so-called 3D maps) for static, animated, and dynamic use is highly advanced. Nevertheless, aspects of the design of such views and of their impact on readers have rarely been investigated in cartographic research. The establishment of cartographic design principles is missing, to a large extent. Within the framework of a research project, propositions for such principles were derived by…
Sixth ICA Mountain Cartography Workshop, Lenk / Simmental, Switzerland, 11–15 February 2008
From 11 to 15 February 2008, the sixth edition of the traditional ICA Mountain Cartography Workshop took place in Switzerland for the first time. The workshops focused on mountain-related topographic and thematic aspects and their depiction on maps and related representations. Every second year since 1998, cartographers and representatives of other fields related to cartography and GIS (geology, natural hazards, tourism, biology, etc.) have met i…
Self-Adjusting Legends for Proportional Symbol Maps
Real-Time Visualization in Operational Hydrology through Web-based Cartography
Early warning and monitoring activities in the field of natural hazard management are crucial in order to limit damage to life and property from extreme natural events. Decision makers in these fields, such as operational hydrologists, must be enabled to quickly and comprehensively assess an on-going situation, examine its details, and then take further actions based on the most current information available. The cartographic challenge is to deli…
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…
Seventh ICA Mountain Cartography Workshop: Mountain Mapping and Geospatial Information Retrieval (Borsa, Maramures, Romania, 1–5 September 2010)
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…
Customized Visualization of Natural Hazards Assessment Results and Associated Uncertainties through Interactive Functionality
Communication of natural hazard assessment results is crucial to protect people and infrastructure from devastating impacts of extreme events. While hazard maps provide important information on potential impacts, their interpretation and the general knowledge exchange between stakeholders is often difficult. Web-based information systems contain the potential to support hazard management tasks by fast distribution and customization of hazard visu…
Toward Dream Cartography: Mapping Dream Space and Content
The objective of dream cartography is to map dream content, that is, to develop new visualization methods and adapt existing ones as graphical means for an explorative dream analysis. We aim at modelling (i.e., disentangling), documenting, reuniting, and graphically depicting the dream space and other relevant psychological aspects of dreams in a meaningful but abstracted way. In this article we describe the proposed workflow for mapping dreams, …
Smart Cartographic Functionality for Improving Data Visualization in Map Mashups
Thanks to the growth of geoportal products and online cartographic platforms, access to spatial data has never been so easy for so many people. But access to cartographic knowledge for laypersons using such data is lagging behind. Platforms that allow users to create map mashups from diverse data sources can lead to unsatisfactory cartographic visualization, which reduces the map's legibility and the usefulness of such functions. This article's f…
A Simulation and Visualization Environment for Spatiotemporal Disaster Risk Assessments of Network Infrastructures
Emerging methodologies for risk assessments of civil infrastructure networks require the coupling of several spatiotemporal models that need to be executed multiple times with varying parametrizations to account for model uncertainty and to investigate “what-if” scenarios. These requirements led to the development of a software environment to support the simulation process and the visual analysis of its results. The simulation engine component of…
Comparison of Relief Shading Techniques Applied to Landforms
As relief influences disposition of all the other objects displayed on maps, terrain representation plays one of the key roles in the map creation process. Originally a manual technique, relief shading creates the three-dimensional effect and allows the user to read the terrain in an intuitive way. With the advent of digital elevation models (DEMs) analytical relief shading came into a wider use, since it is faster, requires less effort, and deli…
Terrain Segmentation Using a U-Net for Improved Relief Shading
Since landforms composing land surface vary in their properties and appearance, their shaded reliefs also present different visual impression of the terrain. In this work, we adapt a U-Net so that it can recognize a selection of landforms and can segment terrain. We test the efficiency of 10 separate models and apply an ensemble approach, where all the models are combined to potentially outperform single models. Our algorithm works particularly w…
Inferring implicit 3D representations from human figures on pictorial maps
In this work, we present an automated workflow to bring human figures, one of the most frequently appearing entities on pictorial maps, to the third dimension. Our workflow is based on training data and neural networks for single-view 3D reconstruction of real humans from photos. We first let a network consisting of fully connected layers estimate the depth coordinate of 2D pose points. The gained 3D pose points are inputted together with 2D mask…
Scale- and Resolution-Adapted Shaded Relief Generation Using U-Net
On many maps, relief shading is one of the most significant graphical elements. Modern relief shading techniques include neural networks. To generate such shading automatically at an arbitrary scale, one needs to consider how the resolution of the input digital elevation model (DEM) relates to the neural network process and the maps used for training. Currently, there is no clear guidance on which DEM resolution to use to generate relief shading …
A novel framework for road vectorization and classification from historical maps based on deep learning and symbol painting
Road networks in the past are imperative for understanding evolution of transportation infrastructure, urban sprawl, and route planning, etc. Various approaches have been developed for road extraction from historical maps, among which deep learning techniques stand out as the most effective ones. However, little attention has been paid to investigating road vectorization and classification from historical maps. Moreover, road classification via m…
Climate Change Maps for the Atlas of Switzerland
Climate change has global consequences, and Switzerland is no exception. The communication of climate change poses various challenges, and maps are often part of this process. This work presents three maps illustrating the impacts of climate change, developed for the Atlas of Switzerland (AoS), an interactive digital national atlas. The aim is to make climate change impacts understandable and visible. Three different indicators of climate change …
Archetypes of settlement development on the Swiss Plateau: Identification, description and prediction
Computer Science (23 works) · Geography (19 works) · Cartography (17 works) · Geographic Information Systems Studies (14 works) · Artificial Intelligence (9 works) · Mathematics (8 works) · Visualization (8 works) · Computer graphics (images (6 works) · Data mining (6 works) · Geology (6 works)