Save and Restore Sessions

You can save the views and layers of an ENVI session to a file that can be later reopened. The layer types that can be included in a saved session are:

• Raster
• NITF files (raster segments only)
• Multi-raster files
• Vector in .shp and .evf format
• ROI in .roi and .xml format
• Annotation
• Grid
• HDF5

When you save the views and layers, the following will also be saved:

• Any files open in ENVI
• The layout of the view
• The layers loaded into the views
• A snail trail image
• Any placemarks
• Any properties (center coordinates, zoom factor, raster stretch, color table, and so forth)
• Any open portals

To save views and layers:

1. Select File > ENVI Session > Save from the menu bar.
2. Navigate to a directory where you have write permission.
3. Save the session using the default filename envi_session.json, or enter a new name in the File name field.

4. Click Save. ENVI saves the file to .json format. An example of a .json file follows:

   {

   "file_type": "ENVI Session File",

   "version": "5.4",

   "layout": "1,1",

   "view00": {

   "name": "View",

   "layer000": {

   "name": "qb_boulder_msi",

   "hide": 0,

   "transparency": 0,

   "data": {

   "url": "C:\\Program Files\\C:\Program Files\INSTALL_DIR\\ENVIxx\\data\\qb_boulder_msi",

   "factory": "URLRaster",

   "auxiliary_url": ["C:\\Program Files\\INSTALL_DIR\\ENVIxx\\data\\qb_boulder_msi.hdr", "C:\\Program Files\\INSTALL_DIR\\ENVIxx\\data\\qb_boulder_msi.enp"]

   },

   "bands": "2,1,0",

   "quick_stretch": "optimized linear",

   "brightness": 50,

   "zoom_percent": 100.00000,

   "sharpen": 10.000000

   },

   "center": "-105.21439,39.997888",

   "rotation": "0.00000000",

   "show_overview": "0",

   "show_snail_trail": "1",

   "coordinate_system": "PROJCS[\"UTM_Zone_13N\",GEOGCS[\"GCS_WGS_1984\",DATUM[\"D_WGS_1984\",SPHEROID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",500000.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",-105.0],PARAMETER[\"Scale_Factor\",0.9996],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]"

   },

   "dataset0000": {

   "url": "C:\\Program Files\\INSTALL_DIR\\ENVIxx\\data\\qb_boulder_msi",

   "factory": "URLRaster",

   "auxiliary_url": ["C:\\Program Files\\INSTALL_DIR\\ENVIxx\\data\\qb_boulder_msi.hdr", "C:\\Program Files\\INSTALL_DIR\\ENVIxx\\data\\qb_boulder_msi.enp"]

   }

   }

   Select the .json file when you want to restore saved views and layers. You can also view and edit this file in a text editor.

To restore saved views and layers:

1. Select File > ENVI Session > Restore from the menu bar.
2. Navigate to a .json file created from a previously saved session.
3. Click Open.