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Harris Geospatial / Docs Center / IDL Reference / I/O - EOS / EOS_GD_QUERY

EOS_GD_QUERY

EOS_GD_QUERY

The EOS_GD_QUERY function returns information about a specified grid.

Syntax


Result = EOS_GD_QUERY( Filename, GridName, [Info])

Return Value


This function returns an integer value of 1 if the file is an HDF file with EOS GRID extensions, and 0 otherwise.

Arguments


Filename

A string containing the name of the file to query.

GridName

A string containing the name of the grid to query.

Info

Returns an anonymous structure containing information about the specified grid. The returned structure contains the following fields:

Field

IDL Data Type

Description

ATTRIBUTES

String

Comma-delimited string containing the names of attributes

DIMENSION_NAMES

String

Comma-delimited string containing the names of dimensions

DIMENSION_SIZES

Long array

Sizes of dimensions

FIELD_NAMES

String

Comma-delimited string containing the names of fields

FIELD_RANKS

Long array

Ranks (dimensions) of fields

FIELD_TYPES

Long array

IDL types of fields

GCTP_PROJECTION

Long

GCTP projection code

GCTP_PROJECTION_PARM

Double array

GCTP projection parameters

GCTP_SPHEROID

Long

GCTP spheroid code

GCTP_ZONE

Long

GCTP zone code (for UTM projection)

IMAGE_LOWRIGHT

Double[2]

Location of lower right corner (meters)

IMAGE_UPLEFT

Double[2]

Location of upper left corner (meters)

IMAGE_X_DIM

Long

Number of columns in grid image

IMAGE_Y_DIM

Long

Number of rows in grid image

NUM_ATTRIBUTES

Long

Number of attributes

NUM_DIMS

Long

Number of dimensions

NUM_IDX_MAPS

Long

Number of indexed dimension mapping entries

NUM_MAPS

Long

Number of dimension mapping entries

NUM_FIELDS

Long

Number of fields

NUM_GEO_FIELDS

Long

Number of geolocation field entries

ORIGIN_CODE

Long

Origin code

PIX_REG_CODE

Long

Pixel registration code

Version History


5.3

Introduced



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