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

annotations
model used to add notes or references to world or screen coordinates.
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 in SMS and WMS. In GMS, cross sections are flat surfaces used to visualize the subsurface.

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

XY series
curve defined by a list of x and y coordinates.

Y

Z