Seadisp Cursor Position Function: Program-level Documentation

Seadisp Cursor Position Widget

Description: The Cursor Position Widget is a simple function which allows the user to position the cursor in the display or zoom windows and show latitude/longitude and data value information (both raw and geo-physical data values). It also shows pixel times for Level-1A, Level-1B, and Level-2 data files, but not for browse or Level-3 files. The pixel times shown are actually scanline times, since the time difference for pixels on a scanline are almost negligible. The cursor position function can be activated by selecting Functions->Cursor Position in the Display Window Widget.

Note: For a bi-directional point location function or box-area data view function, see Functions->Read.

Action items:

Display Mode

Interactive Display point information continuously as the cursor is moved around in the display window or zoom window.

Mouse button Display point information only when the left mouse button is clicked on a point in the display window or zoom window.

Quit Destroy the Cursor Position Widget.

Informational items:

Pixel/Line The pixel and line number of the point, with the upper left-hand corner of the image being pixel/line (1,1). Note: When in the zoom window, pixel/line shown is still relative to the full-resolution display window, not to the zoom window.

Lat/Lon The latitude/longitude value at the cursor location. For data which do not contain navigation information, this will appear as N/A.

Data Value The corresponding raw data value in the pre-imaged band data.

Geo. Value The geo-physical data value of the point, converting from raw band data values to geo-physical data values using the slope, intercept and scale type band information as shown in the Current Product Information section of the Band List Selection Widget.

Pixel YYYY/DDD The 4-digit year(YYYY) and 3-digit julian day(DDD) for the pixel(scanline) at the cursor location. This will not appear for browse and Level-3 data images.

Pixel Time The time for the pixel(scanline) at the cursor location, down to the millisecond. This will not appear for browse and Level-3 data images.

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Pixel/Line	The pixel and line number of the point, with the upper left-hand corner of the image being pixel/line (1,1). Note: When in the zoom window, pixel/line shown is still relative to the full-resolution display window, not to the zoom window.
Lat/Lon	The latitude/longitude value at the cursor location. For data which do not contain navigation information, this will appear as N/A.
Data Value	The corresponding raw data value in the pre-imaged band data.
Geo. Value	The geo-physical data value of the point, converting from raw band data values to geo-physical data values using the slope, intercept and scale type band information as shown in the Current Product Information section of the Band List Selection Widget.
Pixel YYYY/DDD	The 4-digit year(YYYY) and 3-digit julian day(DDD) for the pixel(scanline) at the cursor location. This will not appear for browse and Level-3 data images.
Pixel Time	The time for the pixel(scanline) at the cursor location, down to the millisecond. This will not appear for browse and Level-3 data images.