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 array
|
Array of attribute names
|
|
DIMENSION_NAMES
|
String array
|
Names of dimensions
|
|
DIMENSION_SIZES
|
Long array
|
Sizes of dimensions
|
|
FIELD_NAMES
|
String array
|
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
Introduced: 5.3