ESRI navel inspection aside....

The graphic representations of a collection of entities (i.e. real-world objects), all of which are to be viewed at the same time (or not). The term is sometimes used to indicate the entities themselves.

Sadly, every GIS vendor adds baggage to this term.

Lay"er (?), n. [See Lay to cause to lie flat.]


One who, or that which, lays.

2. [Prob. a corruption of lair.]

That which is laid; a stratum; a bed; one thickness, course, or fold laid over another; as, a layer of clay or of sand in the earth; a layer of bricks, or of plaster; the layers of an onion.


A shoot or twig of a plant, not detached from the stock, laid under ground for growth or propagation.


An artificial oyster bed.


© Webster 1913.

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