Convert JPW to ADF

Understanding JPW and ADF file formats

JPW files are world files used in GIS (Geographic Information Systems) to provide georeferencing information for raster images, such as JPEGs. A JPW file contains coordinates and scale data, allowing mapping software to accurately position the associated image on a map.

ADF files are Arc/Info Binary Grid files, a raster data format developed by Esri for storing geographic data. ADF files are commonly used in ArcGIS and other Esri software for representing elevation, land cover, or other spatial data in a grid format.

How to convert JPW to ADF

Direct conversion from a JPW file to an ADF file is not possible, as JPW files only contain georeferencing information and not the actual image data. To perform this conversion, you need both the raster image (e.g., JPEG) and its corresponding JPW file. The process involves importing the image and its world file into GIS software, then exporting or converting the georeferenced raster to the ADF (Arc/Info Binary Grid) format.

Recommended software for JPW to ADF conversion

ArcGIS by Esri is the best software for this conversion. It fully supports both JPW world files and the ADF grid format. Here’s how you can perform the conversion:

• Open ArcGIS and add your raster image (e.g., JPEG) to the map. Ensure the JPW file is in the same directory as the image.
• ArcGIS will automatically read the JPW file and georeference the image.
• Go to ArcToolbox → Conversion Tools → To Raster → Raster to Other Format.
• Select your georeferenced raster image as the input, choose GRID as the output format, and specify the output location.
• Click OK to start the conversion. The resulting files will be in the ADF format.

Other GIS software like QGIS can also perform this conversion using the Raster → Conversion → Translate (Convert format) tool, but ensure you select the Arc/Info Binary Grid as the output format.

Summary

To convert a JPW (world file) and its associated raster image to an ADF (Arc/Info Binary Grid), use GIS software such as ArcGIS or QGIS. Import the image and JPW, then export to the ADF format using the appropriate conversion tools.