Autodesk 15606-011408-9320 User Guide - Page 174

polygon Also called an area, a polygon is a closed, connected set of lines that reside on the same layer and share the same line style, linetype, and thickness. Because a polygon is a closed area, you can apply fill colors and patterns to it. polyline A connected set of points, arcs, splines, or vertices that reside on the same layer and share the same line style, linetype, and thickness. primary key A field or combination of fields that uniquely identifies each record in a table. The primary key is used to link the records to map features that share the same primary key. See also key. primary key field A field that you define as part of a table or query's primary key. See also primary key. projection See map projection and coordinate system. properties The parameters and settings for a map feature or layer. For example, the properties of a line include its linetype, color, and width. raster image catalog file (RIC) A file containing a list of raster image files. Raster Image Catalog files allow a map author to use multiple raster images on the same layer in a map. This is useful if the images are set up to look like a single image (tiled), because you can create one layer with many images, rather than creating a separate layer for each image. Autodesk MapGuide Author allows only one image file or RIC per layer. raster image file A file containing an image such as a photograph that is stored in a grid of pixels (or cells), unlike SDF files, which store spatial data as vectors (lines). The ability to overlay vector data on raster data is a key feature of Autodesk MapGuide. For example, you can display a raster image file containing a photograph of a particular area, and then overlay a layer of streets and ZIP code boundaries to help identify landmarks in the photograph. Because raster images store a value for every pixel in the grid, rather than storing only the vertices of the lines as SDF files do, raster image files can be quite large and require greater amounts of memory to process. RDBMS (Relational Database Management System) A database that can include links to other databases, so that when you update the data in one database, the linked database is updated as well. See also database. report An HTML page generated by a script you create using a third-party tool like ColdFusion from Allaire. The report provides information about the selected map features or a point you specify, depending on the settings you specify in Autodesk MapGuide Author. When a user chooses to view the report, Autodesk MapGuide Server sends the selected map features or specified point to the report script, which then extracts attribute data from a database for those map features or that point, and then displays the HTML page in your web browser with the results. Examples of reports might be demographic data for the specified layers or the latitude/longitude coordinate of the specified point. resource A file that contains spatial data or attribute data that you can use in a map layer. A resource can be a Spatial Data File (SDF), Raster Image File, Zoom Goto specification, or attribute database. scale See map scale. scale range See display range. SDF See spatial data file. 174 | Glossary