Load Modis Widget

The Load Modis Product Selection Widgets

Description: This procedure reads all MODIS data files (except for Level 2 geolocation files). Supported MODIS data file types are Level -1A, Level_1B, Level-2, Level-3 space binned, Level-3 time-binned, and Level-3 SMI (Standard Mapped Image). The data and associated information (such as navigation information, data units and raw-to-geophysical scaling information) is loaded into memory and made available for display.

Notes:

To read MODIS Level-3 binned files, see Load MODIS Level-3 binned Widget.
There is no hard-coded limit to the number of files loaded into memory at one time. The only limit is the memory limit of your machine.

[Interactive mode][Command mode]

Interactive mode:

Once a MODIS input file is selected, the widget expands to show all the available data products in that file. Once data products are selected, press the Load button to load the products into memory and make available for display. It is not necessary to close the MODIS Product Selection Widget in order to see the products in a new file, simply enter or select a new file and the product list will automatically update.

From Main Menu , select menu item Load -> Modis.

File Selection Section:

Modis Filename Files can be selected in one of two ways:

Manually enter a file name. Then either press Okay or hit <RETURN> to list all the products available in that file.

Press Select to select an input file interactively.

Select Interactively select a MODIS input file.

Okay Show a listing of the available data products in this file. (This is only needed if the user manually enters a file name and does not hit <RETURN>)

File Type Displays information on what type of MODIS file has been selected (i.e., Level-1, Level-2, etc.).

Dimension Displays information on the dimensions of a product in the selected input file.

Geolocation Filename This option will be inactive if the the input MODIS file is not level 2. This allows the user to specify the geolocation file for the input MODIS level 2 file for georeference functions. If the geolocation file is not specified, a warning is given, and the product selected will still be displayed, but no georeference functions (coastline, grid, Lat/Lon of cursor postion) will be usable.

Pixel Sample Rate Select a pixel sample rate for reading the data into memory.

Line Sample Rate Select a line sample rate for reading the data into memory.

Load Palette This option will be inactive if there is no color palette in the MODIS input file selected. If the option is active, then selecting it will read and load the color palette. Remember that any currently displayed images will be affected.

Product Selection Section:

Select One or Many Products buttons Select any number of products desired for reading into memory.

Quit Delete the Product Selection For Modis widget. Products already loaded into memory will still be available.

Help Show this help in HTML viewer.

Select All Select all products listed.

Select None Deselect all products listed.

Load Read selected data products and attributes into memory, into available band list, and make available for display.

Curator: OceanColor Webmaster

Authorized by: gene carl feldman

Updated: 15 December 2008

Modis Filename	Files can be selected in one of two ways: Manually enter a file name. Then either press Okay or hit <RETURN> to list all the products available in that file. Press Select to select an input file interactively.
Select	Interactively select a MODIS input file.
Okay	Show a listing of the available data products in this file. (This is only needed if the user manually enters a file name and does not hit <RETURN>)
File Type	Displays information on what type of MODIS file has been selected (i.e., Level-1, Level-2, etc.).
Dimension	Displays information on the dimensions of a product in the selected input file.
Geolocation Filename	This option will be inactive if the the input MODIS file is not level 2. This allows the user to specify the geolocation file for the input MODIS level 2 file for georeference functions. If the geolocation file is not specified, a warning is given, and the product selected will still be displayed, but no georeference functions (coastline, grid, Lat/Lon of cursor postion) will be usable.
Pixel Sample Rate	Select a pixel sample rate for reading the data into memory.
Line Sample Rate	Select a line sample rate for reading the data into memory.
Load Palette	This option will be inactive if there is no color palette in the MODIS input file selected. If the option is active, then selecting it will read and load the color palette. Remember that any currently displayed images will be affected.

Select One or Many Products buttons	Select any number of products desired for reading into memory.
Quit	Delete the Product Selection For Modis widget. Products already loaded into memory will still be available.
Help	Show this help in HTML viewer.
Select All	Select all products listed.
Select None	Deselect all products listed.
Load	Read selected data products and attributes into memory, into available band list, and make available for display.