Help:Glossary

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This page contains a glossary of terms commonly used in XMS. Many of these terms have usage specific to XMS and may or may not coincide with how these terms are used elsewhere.

A

arc
sequences of line segments or edges, which are grouped together as a single "polyline" entity.
arc group
multiple arcs that have been grouped together so they can be selected at once.

B

breakline
a series of edges to which the mesh or scatter triangles should conform.

C

centerline
arc that represents the direction of a river from upstream to downstream.
contour
a curve along which the function has a constant value.
coverage
groups of feature objects in the Map module.
cross section
arcs used to extract elevations.

D

dialog
a window that pops up after a command is executed. May also be called a window, tool, or editor.

E

element
used to describe the area to be modeled. Elements are formed by joining nodes. May be 1D, triangular, or quadratic.

F

feature object
patterned after Geographic Information Systems (GIS) objects and include points, nodes, arcs, and polygons.
flow trace
animation technique used to visualize vector fields.

G

graphics window
the main portion of the XMS program that gives a visual representation of the project.

H

I

isosurace
a surface of constant value extracted from a 3D dataset.

J

K

L

M

macro
button that executes a commonly used command.
menu
a list of commands. Can be found at the top of the XMS interface or by right-clicking on items.

N

node
define the beginning and ending XY locations of an arc.
nodestring
a collection of nodes.

O

P

plot axes
a set of ruled lines oriented in either the world coordinate system or the grid coordinate system.
point
XY locations that are not attached to an arc.
polygon
a group of connected arcs that form a closed loop.
project explorer
the portion of the interface that lists datasets and components of the project.

Q

R

S

spectral energy
represents energy densities at discrete values over a range of angles and a range of frequencies for a given wave condition.

T

U

V

vertex
XY locations along arcs in between the beginning and ending nodes.

W

X

Y

Z