ENVISAT Image Product (*.n1)

Simple structured uncompressed raster file format consisting of two files- Header file (*.hdr) and an image file with same name but no specific extension.

The (*.hdr) file contains the raster properties and the image file contains the raster data. Generally projected in Universal Transverse Mercator (UTM).

GDAL supports the Envisat product format for read access. All sample types are supported. Files with two matching measurement datasets (MDS) are represented as having two bands.

Currently all ASAR Level 1 and above products, and some MERIS and AATSR products are supported.

The control points of the GEOLOCATION GRID ADS dataset are read if available, generally giving a good coverage of the dataset. The GCPs are in WGS84.


  • Cadcorp SIS Desktop
  • Cadcorp SIS Desktop Express
  • Cadcorp SIS ActiveX Modeller
  • Cadcorp SIS ActiveX Manager
  • Cadcorp SIS ActiveX Viewer
  • Cadcorp GeognoSIS