Overview

Mapping Toolbox provides algorithms, functions, and an app for analyzing geographic data and creating map displays in MATLAB. You can import vector and raster data from a wide range of file formats and web map servers. The toolbox lets you subset and customize data using trimming, interpolation, resampling, coordinate transformations, and other techniques. Geospatial data can be combined with base map layers from multiple sources in a single map display. Mapping Toolbox software manipulates electronic representations of geographic data. It lets you import, create, use, and present geographic data in various forms and to various ends. In the digital network era, it is easy to think of geospatial data as maps and maps as data, but you should take care to note the differences between these concepts. Geospatial data comes in many forms and formats, and its structure is more complicated than tabular or even nongeographic geometric data. It is, in fact, a subset of spatial data, which is simply data that indicates where things are within a given coordinate system. Mileposts on a highway, an engineering drawing of an automobile part, and a rendering of a building elevation all have coordinate systems, and can be represented as spatial data when properly quantified (digitized). Such coordinate systems, however, are local and not explicitly tied or oriented to the Earth's surface; thus, most digital representations of mileposts, machine parts, and buildings do not qualify as geospatial data (also called geodata). A map projection is a procedure that flattens a curved surface such as the Earth onto a plane. Usually this is done through an intermediate surface such as a cylinder or a cone, which is then unwrapped to lie flat. Consequently, map projections are classified as cylindrical, conical, and azimuthal (a direct transformation of the surface of part of a spheroid to a circle). Mapping Toolbox map projection libraries feature dozens of map projections, which you principally control with axesm. Using Mapping Toolbox functions, you can interact with a dynamic web map that uses basemaps from Web-based data sources to give your data a visually rich contextual background. Using other toolbox functions you can locate and download map data that include elevation, oceanography, weather, satellite imagery, and many other raster data sets from Web Map Service (WMS) servers and create static maps or dynamic web map displays using these data sets. This book also describes several types of numerical applications for geospatial data, including computing and spatial statistics, and calculating tracks, routes, and otherinformation useful for solving navigation problems

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9781983429002

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