Terms starting with F

FEATURE EXTRACTION

The systematic process of extracting features from imagery, such as roads, railways and water bodies, that can be displayed on maps or in a Geographic Information System (GIS).

FEATURE SEPARATION

Process of preparing a separate drawing, engraving, or negative for selected types of data in the preparation of a map or chart.

FLOOD PLAIN

Belt of low flat ground bordering a stream channel that is flooded when runoff exceeds the capacity of the stream channel.

FORM LINES

Lines, resembling contour lines, drawn to present a conception of the shape of the terrain without regard to a true datum or regular spacing.

FORMAT

Our image data is offered in different formats depending upon what kind of image application software requirements you have. The formats available for each sensor are included on each product page. Examples of formats are:

Format

Description

BIL

Band Interleaved by Line

BIP

Band Interleaved by Pixel

CEOS

The archive header file used by the EDC Data Center is a Committee on Earth Observing Satellites (CEOS) Inventory Exchange Format (IEF) data exchange file. CEOS provides a three character abbreviation for all participating archive centers and receiving stations.

Fast Format

Band sequential format with simplified single header file structure. Used with Landsat and IRS data.

GeoTIFF

TIFF with geographic coordinates included in file header.

LAN

a multiband continuous image file (name is derived from Landsat).

LTWG/LGSOWG

Band sequential format with complicated file 'superstructure'. The format is seldom used but the multiple headers, leaders, descriptors and supplemental files have specialized information, including ephemeris and attitude data, useful for the orthorectification of Landsat data.

SS-BSQ

Band sequential format with complicated file 'superstructure"; includes ephemeris and attitude data, useful for the orthorectification of data.

TIFF

Tag Image File Format. The most common image file format used by commercial GIS software

TIFF World (TFW)

ASCII file containing information for geocoding image data.