With the rapid growth in the range of spatial information products and services now being offered to consumers, there is increasing competition occurring in the marketplace. The implication of this competition is that...
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ISBN:
(纸本)9783540723844
With the rapid growth in the range of spatial information products and services now being offered to consumers, there is increasing competition occurring in the marketplace. The implication of this competition is that data producers and service providers need to be far more certain that what they create will satisfy customer needs. At the same time it should also yield a positive return on their investment in terms of the time and money spent in research and development, and bringing the product to the marketplace. Traditionally, there has been a tendency within the spatial information industry to think that an information product's usefulness is determined solely by its quality or 'fitness for use'. However, long-standing experience gained from the testing of software and hardware tells us that a more useful concept to apply in judging whether a product will satisfy consumer needs is the concept of 'usability'. This paper discusses some of the factors that might impact on spatial information usability, and illustrates them with a case study of an information product that has almost one million downloads per year, yet still generates many complaints from its consumers.
The objective is to develop a data structure that is capable of handling large data volumes and offers support for querying, analysis and validation. Based on earlier results (i.e. the full decomposition of space, the...
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ISBN:
(纸本)9783540723844
The objective is to develop a data structure that is capable of handling large data volumes and offers support for querying, analysis and validation. Based on earlier results (i.e. the full decomposition of space, the use of a TEN structure and applying Poincare simplicial homology as mathematical foundation) a simplicial complex-based TEN structure is developed. Applying simplicial homology offers full control over orientation of simplexes and enables one to derive substantial parts of the TEN structure, instead of explicitly store the entire network. The described data structure is developed as a DBMS data structure and the usage of views, function based indexes and 3D R-trees result in a compact topological 3D data structure. Theoretical aspects of this approach are described earlier [12, 17, 18]. This paper describes both theory and implementation of the approach.
The highly-interactive, map-based multimedia presentation known as the hypermedia map has emerged along with the development of the interactive personal computer since the 1980s. Although combining maps with other for...
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ISBN:
(纸本)9783540342380
The highly-interactive, map-based multimedia presentation known as the hypermedia map has emerged along with the development of the interactive personal computer since the 1980s. Although combining maps with other forms of representation such as pictures is not new, this particular interactive type of map required an effective electronic form of distribution. The CD-ROM served that capacity briefly but was soon replaced by the Internet which emerged in the mid-1990s as the major form of information delivery. More maps are now distributed through the Internet than through any other medium. But, most of the maps that make their way to the Internet are simply static maps, often scanned from paper, not the highly-interactive hypermedia maps that were expected with this new medium. There are very few examples of hypermedia maps currently available through the Internet, and those that do exist are very difficult to find. The continued development of hypermedia is based on both the accessibility of hypermedia maps through the Internet and a system of remuneration so that the authors of these time-consuming products can be compensated.
The advancement of computer technology enables the integration of geographic information system (GIS) and multimedia technologies that allow to incorporate not only spatial-temporal geographic information in image/vec...
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ISBN:
(纸本)9783540342380;9783540342373
The advancement of computer technology enables the integration of geographic information system (GIS) and multimedia technologies that allow to incorporate not only spatial-temporal geographic information in image/vector format, but also multimedia geographic information in descriptive text, scanned ground photographs, graphics, digital video and sound. The concept of hypermedia GIS is defined in this chapter. Design issues on the development of hypermedia GIS for use on individual personal computers (PC) (i.e., discrete system) and on the Internet (i.e., distributed system) are discussed. Software requirement, file format and data structure used in each system are described. The discrete and distributed hypermedia GIS provide the essential concepts and techniques for many new GIS applications such as visualization, spatial decision support systems and spatial database management and exploration.
Every day a suite of satellites in orbit about the Earth captures massive amounts of data in a vast spectrum of wavelengths. The Earth's systems are being measured more accurately, more frequently, and with higher...
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ISBN:
(纸本)9783540342380
Every day a suite of satellites in orbit about the Earth captures massive amounts of data in a vast spectrum of wavelengths. The Earth's systems are being measured more accurately, more frequently, and with higher resolution than ever before in our history. The amount of data generated is prodigious, pouring into data archive centers at over 1000 GBytes per day. This presents a challenge to those who wish to locate and use data for a specific application over a constrained geospatial area and time span. The vast majority of the data are free, or available at low cost. However, there remain barriers to its use because in many cases the data are not in a preferred format, it is difficult to locate, it is hard to extract a specific data item from the massive inventories, or simply because users are not aware that an important data set exists. In this chapter, you will learn how to find data, by using data catalog services, and how to order data, by using data search and order systems. You will also be presented with summary information on the data resources available from NASA's nine data archive centers.
The rapid development of the mobile internet enforces the emergence of location based services. Beside car navigation systems, which are standard equipment to many drivers all over the world today, guiding systems for...
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ISBN:
(纸本)9783540342380;9783540342373
The rapid development of the mobile internet enforces the emergence of location based services. Beside car navigation systems, which are standard equipment to many drivers all over the world today, guiding systems for pedestrians gain more and more importance. While drivers are dependent on tight directions, pedestrians can be provided with more detailed information. Many different possibilities are imaginable in this respect, but not all of them are effective as guiding instructions. In this chapter general considerations about wayfinding tasks in urban environments are discussed and diverse communication methods are investigated regarding their potential as route finding aids.
Geographers can play an essential role in interpreting Earth and Biodiversity Science concepts to general audiences. Museums and informal science institutions have begun to use visualizations of geospatial data within...
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ISBN:
(纸本)9783540342380
Geographers can play an essential role in interpreting Earth and Biodiversity Science concepts to general audiences. Museums and informal science institutions have begun to use visualizations of geospatial data within high definition video (HDTV) programming to present complex science concepts to audiences of varying ages and varying scientific training. The diversity of experience and understanding among audiences imposes many demands on geographers working with HDTV, for they must simultaneously provide content of interest to novices and experts alike. This chapter introduces essential guidelines for producing HDTV geovisualizations while emphasizing the particular talents that geographers bring to bear on time series visualizations involving geospatial data.
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