2011

join A relationship that is established between attribute data and feature
sources for the purposes of creating a new view of the data or for ad-hoc
analysis.
JPG2000 An advanced raster image format from Joint Photographics Expert
Group, featuring options for lossless compression, wavelet compression,
incremental decompression, and support for up to 48-bit color.
key column One or more columns in a table whose values are used to uniquely
identify a record. To provide useful links, a key column should contain a
unique value for each record. Also called a key field.
key value A value stored on an object that specifies that value to match in
the key field of a table.
key view In a map book, an overview of the entire map with the current tile
boundaries displayed.
label Text placed on or near map
feature (page 2063) to describe or identify
them.
LAS LiDAR Aerial Survey. LAS is an industry standared file format defined by
the American Society of Photogrammetry and Remote Sensing. The LAS
standard includes LiDAR point classification.
latitude The first part of a spherical coordinate system used to record positions
on the earths surface. Latitude indicates the angular distance north or south
of the equator. See also
longitude (page 2067).
layer A resource that references a feature source or a drawing source. The layer
contains styling and theming information, and optionally a collection of scale
ranges. You add a layer to your map using
Display Manager (page 2060). Specific
types of layers are
drawing layer (page 2060), feature layer (page 2063), and surface
layer
(page 2076).
layout template In a map book, a named composition of viewports and
annotation (page 2055) in paperspace. It includes the intended paper size and
output scale for plotting and publishing. See also
map book template (page
2067).
left outer join A type of join where all records in the primary table are
displayed, whether they have a matching record in the joined secondary table
or not.
LiDAR Light Detection And Ranging. A remote-sensing method that can be
used to generate an image of a surface.
2066 | Glossary