Data Compression for Network GIS
نویسندگان
چکیده
Data compression algorithms can be categorized into lossless and lossy. Bit streams generated by lossless compression algorithm can be faithfully recovered to the original data. If loss of one single bit may cause serious and unpredictable consequences in original data (for example, text and medical image compression) lossless compression algorithm should be applied. If data consumers can tolerate distortion of original data to a certain degree, lossy compression algorithms are usually better because they can achieve much higher compression ratios than lossless ones. Some commonly used lossless and lossy data compression algorithms are listed in Table I.
منابع مشابه
Scalable and Extensible Infrastructures for Distributing Interoperable Geographic Information Services on the Internet
The explosive growth in Internet-powered services has fueled the quest for finding new killer Internet-based applications. This quest has often led to applications based on Geographic Information Systems (GIS), especially in the emerging field of the Mobile Internet. Unfortunately, the traditional GIS model falls short of accommodating the requirements and needs of the Internet environment. A m...
متن کاملWavelet triangulated irregular networks
GIS applications have recently begun to emerge on the Internet. The management of three-dimensional geographic datasets in this distributed environment poses a particularly challenging problem, which highlights the need for a good data representation. This paper presents a new multiresolution data representation: the Wavelet Triangulated Irregular Network (WTIN). Compared to the traditional cel...
متن کاملLow-complexity video compression for wireless sensor networks
We study the problem of compression of videosurveillance sequences collected by a wireless sensor network. In particular, we propose a low-complexity coding framework based on change detection and JPEG-like compression of regions of interest, along with a suitable low-complexity change detection algorithm. We show that on typical videosurveillance sequences the performance of the proposed compr...
متن کاملDesign of a Distributed Interactive Online GIS Viewer by Wavelets
The purpose of this paper is to develop a distributed interactive online GIS (DIOGIS) viewer using wavelet technology. Wavelet analysis is a new mathematical tool that can transform information into a multiresolution format. This allows efficient transmission of data upon clients’ requests. In DIO-GIS, a raster map is treated as a two-dimensional function and decomposed into a non-redundant hie...
متن کاملOptimization of Energy Consumption in Image Transmission in Wireless Sensor Networks (WSNs) using a Hybrid Method
In wireless sensor networks (WSNs), sensor nodes have limited resources with regard to computation, storage, communication bandwidth, and the most important of all, energy supply. In addition, in many applications of sensor networks, we need to send images to a sink node. Therefore, we have to use methods for sending images in which the number and volume of packets are optim...
متن کامل