Layers and partitioning
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A data layer has already been described as a set of logically related geographic features and their attributes. Features included in particular layers are chosen by the user. Usually organisation is based on grouping similar feature types. For example, data can be grouped thematically according to the type of geographic features that are represented. |
Raster data layers 28kb
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To understand the concept of multiple data layers see |
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Partitioning
Partitioning the data involves subdividing data into smaller units called
tiles. This occurs when the GIS has to handle
large amounts of data.
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See http://www.geog.ubc.ca/courses/klink |
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