GIS, LAN ERDAS

ERDAS .gis or .lan formats are often used for raster images, for example, from Landsat Thematic Mapper (TM) satellite imagery.

 

To import from ERDAS .gis format:

 

  1. Choose File-Import from the main menu.

  2. In the Import dialog browse to the location of the file and double-click on the .gis file desired.

  3. A table and an image will be created.

  4. Open the image and Immediately launch Assign Initial Coordinate System in the Component panel of the Contents pane to specify the correct initial projection for the image.

 

See the Example: Import ERDAS GIS with GDAL and Assign Coordinate System  topic for a step-by-step example using GDAL.  

Notes

Projections - Take care to find any available commentaries or metadata information that may accompany the .gis files in use.   .gis files do not provide full projection information and will result in imports that do not correctly specify projection information.  In that case, we will have to use whatever documentation we can find on the data set to learn what the correct projection should be so we can specify it using Assign Initial Coordinate System.

See Also

Images

 

Assign Initial Coordinate System

 

Repair Initial Coordinate System

 

Coordinate System

 

Base Coordinate System

 

Style

 

Palette Images

 

Example: Spectacular Images and Data from Web Servers

 

Example: An Imageserver Tutorial

 

Example: Import ERDAS GIS with GDAL and Assign Coordinate System  - A multistep example that covers import of an unwieldy format using GDAL, followed by use of Assign Initial Coordinate System and Repair Initial Coordinate System to deal quickly with real-life complications.