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