On-the-Fly Mosaicking Continued from page 7 Term Function Mosaic/ Mosaicked image Mosaic dataset Description On-the-fly, nonpermanent processing applied to one or more rasters as they are accessed. An image composed of multiple images fused together. A mosaic can be a static product, such as a map cache created from a single raster dataset, or a dynamic image created using a mosaic dataset. A collection of raster datasets (images) stored as a catalog and viewed as a mosaicked image that is dynamic. The properties of the original imagery are maintained, and overlapping imagery can be ordered as required. A layer that references a mosaic dataset. It can be viewed in ArcMap as a group layer that consists of boundary, footprint, and image layers. It can also be used by geoprocessing tools to access pixel data. A rule for ordering overlapping rasters when viewing the mosaicked image so that the optimum image is displayed on top. Reduced-resolution datasets generated to improve the speed at which the mosaic is displayed. A set of reduced-resolution rasters associated with a raster dataset that enables faster display of the raster at smaller scales. A collection of raster datasets defined in a table. Each record in the table represents an individual raster dataset in the catalog. A managed raster catalog can be used to store imagery directly in a database. Any valid raster format organized into one or more bands. Each band consists of a matrix or array of equally spaced cells (pixels) arranged in rows and columns. Each pixel in the raster dataset has a value. Raster datasets have associated properties, such as spatial reference, as well as metadata. Detailed extent of a raster dataset. Imagery outside the footprint is clipped from the viewed image. A layer that references a raster dataset and may define additional processing or functions to be applied to the image. Identifies how to import detailed mosaic dataset properties and metadata, such as georeferencing, acquisition date, and sensor type, along with a raster format. Mosaic layer Mosaic method Overviews Pyramid Raster catalog Raster dataset Raster footprint Raster layer Raster type A brief glossary of mosaic dataset terms A Quick Look at the Mosaic Dataset fx Slope fx Source images Mosaic dataset Elevation Referenced mosaic Hillshade Referenced mosaic datasets can generate different sets of products, each with specific mosaicking methods and mosaic dataset functions, from the same source. 8 ArcUser Summer 2010 www.esri.com