ENVI Classic files may conform to a range of different file types. This function returns a file type descriptor. All ENVI Classic files that require a special display or input processing have a unique file type (meta file, virtual mosaic, classification, spectral library, FFT result). Any external file that requires an input read procedure also has a designated file type.
Syntax
Result = ENVI_FILE_TYPE(File_type)
Arguments
File_type
File_type can be either an integer or a string.
If File_type is an integer, the function returns the string-format description of the file type returned by ENVI_FILE_QUERY.
If File_type is a string, the function returns an arbitrarily assigned integer to use in procedures such as ENVI_SETUP_HEAD or ENVI_ENTER_DATA.
The file types and string descriptors are found in the following table. File_type string descriptors are case-sensitive and may contain spaces.
|
File Type |
String Descriptor
|
|
ENVI Standard |
ENVI Standard |
|
ENVI Meta File |
ENVI Meta File
|
|
ENVI Virtual Mosaic
|
ENVI Virtual Mosaic
|
|
ENVI Classification
|
ENVI Classification
|
|
ENVI Spectral Library
|
ENVI Spectral Library
|
|
ENVI FFT Result |
ENVI FFT |
|
Australian Centre for Remote Sensing CEOS
|
ACRES CEOS |
|
ARC Digitized Raster Graphics
|
ADRG |
|
AVHRR LAC/HRPT, GAC data
|
AVHRR CD |
|
BMP |
BMP |
|
CEOS Generic |
CEOS Generic |
|
Envisat |
ENVISAT |
|
ERDAS 8.X |
ERDAS 8.X |
|
ERDAS IMAGINE |
ERDAS IMAGINE |
|
European Space Agency Landsat TM
|
ESA Landsat TM |
|
ESA SHARP |
ESA SHARP |
|
Esri GRID |
Esri GRID |
|
HDF EOS ASTER |
HDF EOS ASTER |
|
HDF EOS MODIS |
HDF EOS MODIS |
|
HDF Landsat |
HDF Landsat
|
|
HDF MODIS Simulator
|
HDF Modis Simulator
|
|
HDF Scientific Data and Raster
|
HDF SD |
|
HDF SeaWiFS |
HDF SeaWiFS |
|
JPEG2000 |
JPEG2000 |
|
Multi-Resolution Seamless Image Database
|
MrSID |
|
National Imagery Transmission Format
|
NITF |
|
National Landsat Archive Production System CD
|
NLAPS CD |
|
NOAA DMSP |
NOAA DMSP |
|
PCI |
PCI |
|
Planetary Data System Image
|
PDS Image |
|
RADARSAT |
RADARSAT |
|
SPOT CD |
SPOT CD |
|
TIFF and GeoTIFF
|
TIFF |
|
Tiled QuickBird |
Tiled QB |
|
Tiled WorldView |
Tiled WV |
|
TFRD |
TFRD |
|
ENVI Zoom |
Zoom |
Examples
The following example prints the file-type string of the file associated with the file ID. The first command stores the integer file-type descriptor in the variable file_type:
ENVI_FILE_QUERY, fid, file_type=file_type
The next line stores the string file type descriptor in the variable TYPE_STRING:
type_string = ENVI_FILE_TYPE(file_type)
print, type_string
The next example enters the array DATA into ENVI Classic and sets the file type to SPOT data. The first line gets the integer file type for SPOT data. The second line enters the array.
file_type = ENVI_FILE_TYPE('SPOT CD')
ENVI_ENTER_DATA, DATA, file_type=file_type
API Version
4.3