.JGW File Info & Viewer

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.JGW files online

Need to inspect georeferencing data? View your .JGW files online for free - no GIS software required.

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JPEG world files & more
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Extension
.JGW
Category
GIS
Primary Use
Image Georeferencing Data
Primary Software

ArcGIS

What is a JGW file?

A .JGW file is a JPEG World File originally introduced by Esri. It contains geographic reference data for a corresponding .JPG, .JPEG, or .JP2 image. Geographic Information Systems (GIS) software uses this plain text file to place an aerial photograph or map at the correct location, scale, and rotation on a digital globe.

How to open JGW files?

Because .JGW files contain plain text coordinate data, you can open them with basic text editors like Notepad or Visual Studio Code. To view the actual map, you must load both the .JPG image and the .JGW file into GIS software like ArcGIS, QGIS, or Global Mapper. Ensure both files have the exact same name and are in the exact same folder so the software can link them.

Inspecting and Converting

If you receive a .JGW file without an image, or you want to quickly see its spatial parameters, viewer.online/jgw can analyze .JGW files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available. If you need to transform the geographic coordinate system or convert the paired image entirely, we recommend file conversion to sensible target formats like GeoTIFF on convert.guru.

Summary

viewer.online/jgw is useful for identifying, inspecting, and understanding .JGW files without installing specialized GIS software or dealing with compatibility problems.

Frequently Asked Questions

What does a .JGW file contain?

A .JGW file contains six lines of text. These lines represent the pixel size, rotation, and geographic coordinates for the top-left corner of the associated .JPG image.

Why does my GIS software ignore the .JGW file?

The .JGW file must have the exact same filename as the .JPG image (for example, `map.jpg` and `map.jgw`). They must also be stored in the same folder for software like ArcGIS or QGIS to read them together.

Can I open a .JGW file to see the image?

No. The .JGW file only stores text data describing the location. You need the original .JPG or .JPEG image file to see the actual visual map or photograph.

Can I edit a .JGW file?

Yes. Because it is a plain text file, you can edit it using basic text editors. However, changing the numbers will alter the scale and physical position of the image in your GIS software.

What is the difference between TFW and JGW files?

Both are world files created for georeferencing. A .JGW file is associated with a JPEG image, while a .TFW file is associated with a TIFF image.

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