Files with twf extension can be encountered as data files with world coordinates from ArcView / ArcGIS for Desktop by ESRI.

There are 3 other file types using
the TWF file extension!

empty icon.twf - Casio organizer data

empty icon.twf - TabWorks data

empty icon.twf - Tecgraf Web Format

Detailed description

Software that open twf file

Add comment

TWF file extension - ArcView world coordinates file

What is twf file? How to open twf files?

File type specification:

GIS, GPS navigation and map file type icon GIS, GPS navigation and map file type

File extension twf is probably best known for specific use in ESRI ArcView GIS software.

twf files provide real world coordinate information that allows a corresponding .tif file to be correctly positioned on a map or in a mapping system.

They are in ASCII editable format that contain six numbers, one on each line. Something like this:


Each line provides the following information:

  • Line 1: X-scale. This is the horizontal distance in meters represented by each pixel. So in the above example each pixel is .7 meters wide.
  • Line 2: Rotation about the Y axis.
  • Line 3: Rotation about X axis.
  • Line 4: Y-scale This is the vertical distance in meters represented by each pixel. So in the above example each pixel is .9 meters tall. Normally negative, because whilst an image has its origin in the top left corner, for Northings and Eastings the origin is normally considered to be the bottom left corner - hence why the scale is normally negative.   
  • Line 5: X-reference point. This is the horizontal coordinate (or Easting) of the center of the top left pixel.
  • Line 6: Y-reference point. This is the vertical coordinate (or Northing) of the center of the top left pixel.

Occasionally the twf files can also have two additional lines, but they are not part of the standard ArcView TWF file format.

  • Line 7: Grid zone or Coordinate System.
  • Line 8: Datum

Updated: December 4, 2023

The default software associated to open twf file:

ArcGIS for Desktop Basic (ArcView) icon

Esri logoArcGIS for Desktop Basic (ArcView)  Microsoft Windows software

Company or developer:

ArcGIS for Desktop Basic (formerly known as ArcView) is GIS (geographic information system) application used to visualizing, managing, creating, and analyzing geographic data.

ArcGIS for Desktop Basic is a part of the ArcGIS Desktop. ArcGIS for Desktop Basic supports creation of interactive maps, spatial analysis, GIS deployment, map viewing and navigation, map printing etc.

Help how to open:

Use ArcView (ArcGIS for Desktop) to open .twf world coordinates files.

How to convert:

ArcGIS can be able to export .twf files to other file formats.

List of software applications associated to the .twf file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open twf file, edit twf file, convert twf file, view twf file, play twf file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting twf files.

Software that open twf file - ArcView world coordinates file

Programs supporting the exension twf on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about ArcGIS for Desktop Basic (ArcView) for open twf file action.

Previous file extension
TTPKG file extension > GIS, GPS navigation and map file types

Next file extension
file extension TWL


Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

RSS feed