2D Scatter Point Files (*.xy)

Two-dimensional scatter point sets are stored in 2D scatter point files. The file includes the scatter point locations and requires that functional information be defined in a separate data set file. However, multiple scatter point sets can be stored in a single file. An XY coordinate pair defines each point in a scatter point set. The format allows time variant data sets to be associated with scattered data points as well as to organize data sets by allowing the user to assign an ID to the scattered data set.

Scatter files are opened through File | Open and are saved from File | Save Scatter from the Scatter module. When scatter point files are saved, a super file is saved. The super file saves and references the scatter and data set files.

File Format

SCAT2D               /* File type identifier */
BEGSET               /* Beginning of cards for scatter point set */

NAME "name"          /* Name of scatter point set */

ID id                /* ID of scatter point set */

DELEV elev1          /* Default elevation */

IXY np               /* Number of points in set, begin point listing */

id
1 x1 y1              /* Point id and coordinatess, one per line */
id
2 x2 y2
.

.

id
np xnp ynp
ENDSET               /* End of cards for scatter point set */

/* Repeat point set cards as many times as necessary */

Sample File

SCAT2D
BEGSET

NAME   "lakes"

ID   8493

DELEV 0.00000000000e+00

IXY 25

1 1.47000000000e+02 3.90000000000e+02

2 8.82000000000e+02 9.49000000000e+02

.

.

24 1.73000000000e+02 7.01000000000e+02

25 5.39000000000e+02 8.98000000000e+02

ENDSET

Cards

 

Card Type

BEGSET

Description

Identifies the beginning of a scatter point set.  No fields.

Required

NO

 

Card Type

NAME

Description

Defines the name for the following scatter point set.

Required

NO

Format

NAME "name"

Sample

NAME "st mary"

Field

Variable

Value

Description

1

name

str

The name for the following scatter points.  Remains as default until new NAME card is encountered.

 

Card Type

ID

Description

Defines the ID for the scatter point set.

Required

YES

Format

ID id

Sample

ID 43098

Field

Variable

Value

Description

1

id

+

The ID for the following scatter point set.

 

Card Type

IXY

Description

Defines a scatter point set.

Required

YES

Format

IXY np
id1 x1 y1
id2 x2 y2
.
.
idnp xnp ynp

Sample

IXY 4
1 12.3 34.5
2 52.2 23.5
3 63.2 27.4
4 91.1 29.3

Field

Variable

Value

Description

1

np

+

The number of scatter points in the scatter point set.

2

id

+

The ids of the points.

3-4

x,y

±

The coordinates of the points.

Repeat fields 2-4 np times

 

 

 

 

Card Type

ENDSET

Description

Identifies the end of a scatter point set.  No fields.

Required

NO