Convert IMH to IMF

Understanding IMH and IMF file formats

IMH files are typically associated with ERDAS IMAGINE, a remote sensing application used for processing geospatial raster data. The IMH file acts as a header or metadata file, often accompanying raster image data files, and contains information about the image structure, such as dimensions, data type, and georeferencing details.

IMF files, on the other hand, are most commonly known as Image Map Files or Intergraph Mapping Format files, used in GIS and mapping applications. These files store geospatial data, including vector and raster information, and are used for map visualization and analysis.

How to convert IMH to IMF

Direct conversion from IMH to IMF is not straightforward, as IMH is a header file and not a standalone image or map. To perform a conversion, you typically need the associated raster data file (often with extensions like .img or .bil) that the IMH file describes. The process involves exporting the raster data, using the metadata from the IMH file, into the IMF format supported by your GIS software.

Recommended software for IMH to IMF conversion

• ERDAS IMAGINE: Open your raster dataset (IMH + associated data file), then use File → Export to save the data in a supported format. If IMF is not directly supported, export to a common GIS format (like GeoTIFF), then use another GIS tool to convert to IMF.
• GDAL (Geospatial Data Abstraction Library): Use the gdal_translate command-line tool to convert raster data from the format described by IMH to another format, then use GIS software to convert to IMF if needed.
• Intergraph GeoMedia: Import the raster data and export it as an IMF file using File → Export → IMF.

Step-by-step conversion process

1. Ensure you have both the IMH file and its associated raster data file.
2. Open the dataset in ERDAS IMAGINE or a compatible GIS tool.
3. Export the dataset to a common GIS raster format (e.g., GeoTIFF) if IMF is not directly supported.
4. Open the exported file in Intergraph GeoMedia or another tool that supports IMF.
5. Use File → Export → IMF to save the file in the IMF format.

Tips and considerations

• Always verify that the spatial reference and metadata are preserved during conversion.
• If you encounter compatibility issues, consider using GDAL for intermediate format conversion.
• Check the documentation of your GIS software for specific IMF export options.