Cognitive spaces and metaphors: A solution for interacting with spatial data

Neves, Nelson; Silva, Joao; Gonçalves, Pedro; Muchaxo, Joaquim; Silva, João M.; Câmara, Andréa Cruz

doi:10.1016/s0098-3004(97)00016-2

Cited by 12 publications

(2 citation statements)

References 8 publications

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“…cartographic perspectives attempt to support the same behaviors. Neves and colleagues (Neves et al, 1997) developed an immersive virtual workspace based on a GIS room metaphor (a room in which maps can be mounted on the wall or placed on a digitizing tablet for encoding in the database). Their implementation supported only one user at a time.…”

Section: Real Worldmentioning

confidence: 99%

Download Complete Issue: CP54 (27MB)

Issue¹

2006

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Think about this: You and your partner are the owners and operators of a struggling cartographic firm, Map-Off, Ltd. You are offered a lucrative contract, with more to come if they like your work, to make a map based on publicly available data (http://apps.nccd.cdc.gov/ brfss). The client asks you to map healthy smokers over 70 years of age in the United States. You are free to find and use statistics (a bar chart, for example), graphic images (of tobacco, of smokers, etc.) and anything else that will make your map the best statement possible. Your perspective client is the American Association of Tobacconists (AAT). Knowing that tobacco is a carcinogen responsible for the deaths of some but not all users, and some non-users affected by second-hand smoke, do you take the contract? Do you make the map? 4 Number 54, Spring 2006 cartographic perspectives

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Section: Real Worldmentioning

confidence: 99%

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Issue¹

2006

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“…Several systems have been developed to interface virtual environment technology with GIS data sets [Grafet al, 1994;Koller et al, 1995;Faust et al, 1996;Neves et al, 1997]. These systems typically render novel perspective views from digital elevation models (DEMs) and images generated by remote sensing techniques.…”

Section: ]mentioning

confidence: 99%

Analyzing Pathfinder data using virtual reality and superresolved imaging

Stoker¹,

Zbinden²,

Blackmon³

et al. 1999

J. Geophys. Res.

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Abstract. The Mars Pathfinder mission used a unique capability to rapidly generate and interactively display three-dimensional (3-D) photorealistic virtual reality (VR) models of the Martian surface. An interactive terrain visualization system creates and renders digital terrain models produced from stereo images taken by the Imager for Mars Pathfinder (IMP) camera. The stereo pipeline, an automated machine vision algorithm, correlates features between the left and right images to determine their disparity and computes the corresponding positions using the known camera geometry. These positions are connected to form a polygonal mesh upon which IMP images are overlaid as textures. During the Pathfinder mission, VR models were produced and displayed almost as fast as images were received. The VR models were viewed using MarsMap, an interface that allows the model to be viewed from any perspective driven by a standard three-button computer mouse. MarsMap incorporates graphical representations of the lander and rover and the sequence and spatial locations at which rover data were taken. Graphical models of the rover were placed in the model to indicate the rover position at the end of each day of the mission. Images taken by Sojourner cameras are projected into the model as 2-D "billboards" to show their proper perspective. Distance and angle measurements can be made on features viewed in the model using a mouse-driven 3-D cursor and a point-andclick interface. MarsMap was used to assist with archiving and planning Sojourner activities and to make detailed measurements of surface features such as wind streaks and rock size and orientation that are difficult to perform using 2-D images. Superresolution image processing is a computational method for improving image resolution by a factor of n 1/2 by combining n independent images. This technique was used on Pathfinder to obtain better resolved images of Martian surface features. We show results from superresolving IMP camera images of six targets including near-and far-field objects and discuss how the resolution improvement aids interpretation. Similar flood deposits can be seen on both of the Twin Peaks that cannot be resolved in raw images. Millimeter-sized pits are resolved on the rocks Wedge and Halfdome. Other rocks at the Pathfinder site exhibit fine-scale layering that is otherwise invisible. Use of the method resulted in the probable discovery of an artifact of intelligent life on Mars: a part of the Pathfinder spacecraft. IntroductionPathfinder was the first rover mission to Mars, but it will not be the last. Rover missions are able to perform many of the functions of a field geologist [Stoker, 1996[Stoker, , 1998]. For example, a field geologist is able to look around, construct a mental three-dimensional (3-D) model of the nearby surroundings; perform measurements of nearby objects; determine slopes, strike, and dip of the distant terrain; and construct detailed maps of the region. The geologist also uses binoculars to get improved resolution of distant fe...

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Trajectory-Based Presentation of Heterogeneous Spatio-temporal Content

Tezuka

Tanaka

2005

Web and Wireless Geographical Information Systems

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Cognitive spaces and metaphors: A solution for interacting with spatial data

Cited by 12 publications

References 8 publications

Download Complete Issue: CP54 (27MB)

Download Complete Issue: CP54 (27MB)

Analyzing Pathfinder data using virtual reality and superresolved imaging

Trajectory-Based Presentation of Heterogeneous Spatio-temporal Content

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