Current Trends in Vector-Based Internet Mapping: a Technical Review
Chapter 3 Current Trends in Vector-Based Internet Mapping: A Technical Review Christophe Lienert, Bernhard Jenny, Olaf Schnabel, and Lorenz Hurni Abstract Possibilities and limitations of Internet cartography software largely depend on the pace set by the software industry. The variety of commercial and non-commercial software caters for the needs of a continuously growing mapping community, including both professional and amateur cartographers. This chapter provides an overview of state-of-the-art technologies for vector-based Web- mapping as of the beginning of 2011. Both proprietary and open format technologies are discussed for vector data rendering in browsers, highlighting their advantages and disadvantages. The discussed technologies are Adobe Flash, Microsoft Silverlight, Scalable Vector Graphics (SVG), JavaFX, Canvas, and WebGL. The chapter also discusses client and server side frameworks which provide Application Programming Interfaces (APIs) for creating custom interactive maps, mainly by overlaying raster images with vector data. 3.1 Introduction Internet maps are the major form of spatial information delivery, as the Internet is today the primary medium for the transmission and dissemination of maps (Peterson 2008). For map authors, the maze of available techniques for creating and distributing Web maps is overwhelming, while authoring tools for Web-maps meeting the demands of high-quality cartography are difficult to find. Map authors may choose between GIS and graphics software products to create maps for the Internet, but these off-the-shelve maps oftentimes fall short of effectively convey- ing information. There are three main reasons for this shortcoming: (a) the design of these maps sometimes does not take into account the specific limitations of digital displays (Jenny et al., 2008); (b) the maps are often restricted in using standard C.
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