2012

Table Of Contents
limits
See drawing limits.
line font
See linetype.
linetype
How a line or type of curve is displayed. For example, a continuous line has
a different linetype than a dashed line. Also called line font. (LINETYPE)
lineweight
A width value that can be assigned to all graphical objects except TrueType
®
fonts and raster images.
LL84 coordinate system
Common latitude longitudinal-based coordinate system where latitude and
longitude are both measured from -90 to 90 degrees.
Longitude begins at 0 degrees at the Prime Meridian in Greenwich, England
and is measured from -180 to 180.
Latitude is 0 degrees at the equator and is measured from -90 to 90.
lofted solid/surface
A solid or surface that is drawn through a set of two or more cross-section
curves. The cross sections define the profile (shape) of the resulting solid or
surface. Cross sections (generally, curves or lines) can be open or closed. (LOFT)
lumen
The SI unit of luminous flux (Symbol: lm). Cd * Sr
luminaire
This refers to the aggregation of a lamp or lamps and its fixture. The fixture
may be a simple can or a complex armature with constrained joints.
luminance
Luminance is the value of light reflected off a surface. It is a measure of how
bright or dark we perceive the surface.
luminous flux
The perceived power in per unit of solid angle. The total luminous flux for a
lamp is the perceived power emitted in all directions.
Glossary | 849