Autodesk 15606-011408-9008 - MAPGUIDE R6.3 NAMED-100U PK, Руководство пользователя

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Glossary
centroid A point designated as the center of a polygon. A centroid is typically com-
puted using information derived from the boundary of the polygon. Computed cen-
troids generally lie within the polygon, but they can also lie outside of the polygon.
CGI See Common Gateway Interface.
character spacing ratio The ratio of the distance between text characters to average
character width. For example, if the distance between text characters is 3.5 mm, and the
character spacing ratio is 0.5, the average character width is 7 mm.
Common Gateway Interface (CGI) An interface that allows server applications to
work with Web servers. You can use the CGI version of the Autodesk MapGuide Server
MapAgent to work with either Microsoft Internet Information Server or a Netscape
Internet Server.
complex symbols A symbol composed of one or multiple bitmaps and one or multi-
ple vector graphics, all of which appear as one symbol in the associated layer.
Computer Aided Acquisition and Logistics Support (CALS) A format for compress-
ing raster images. MapGuide supports CALS MIL-R_28002A Type 1 Format. This format
typically works best for black-and-white images that use 1 bit per pixel.
coordinate system Any of a number of reference systems used to define the unique
location of a point in space and to reference point, line, and area information by defin-
ing its geographic location. A coordinate system is usually defined by a projection, an
ellipsoid definition, a datum definition, one or more standard parallels, and a central
meridian.
coordinate system origin The reference location for a planar coordinate system that
is stored with a map.
Coverage A data format that includes files created in ESRI Arc/Info. You can convert
these files to latitude/longitude SDFs using the SDF Loader.
CTRL-click A method of selecting multiple, non-contiguous items in a list by holding
down the CTRL key, and then clicking each item you want to select.
database A collection of interrelated alphanumeric data files controlled by a database
management system (DBMS). Databases are structured so that the DBMS can perform
rapid search and retrieval by various data elements. In Autodesk MapGuide, “database”
refers to a relational database that stores attribute data, such as a database of records that
contain information like population and area for each country. See also
RDBMS .
data provider A data provider that can process spatial queries and access spatial data.
You can purchase Autodesk MapGuide data providers for Autodesk GIS Design Server,
Oracle Spatial, and ArcView SHP.
data source A Microsoft Data Link (UDL) file or Autodesk Data Link (ADL) file, with
a .udl or .adl extension. These files contain all the information required to connect to a
specific data provider. Before you can access an external database from within Autodesk
MapGuide, you must configure it as an OLE DB or Autodesk DWG data source.
Data Source Name (DSN) An ODBC data source that contains information about how
to connect to a particular database, spreadsheet, or other data source. You can set up
User DSNs, which are available only when you log on to your computer, and System
DSNs, which are available to all users and to NT services on your computer.