ENVI Basics for GEOINT is a scenario-based introduction to ENVI, designed to get defense and intelligence image analysts, geospatial engineers, and geospatial analysts up to speed as quickly as possible. Each exercise represents a real-world scenario in which students use ENVI tools to solve a geospatial problem and to generate an output product.
Sections in This Course
Getting Started with ENVI
4 Hours
- Learning the ENVI interface
- Exploring the ENVI Toolbox
- Setting preferences
- Opening, displaying, and navigating imagery
Image Reconnaissance
3 Hours
- Using contrast stretching to enhance imagery
- Working with multiple views
- Annotating imagery
- Creating a map presentation in PowerPoint
Preparing NITF Imagery for Facility Analysis
3 Hours
- Viewing NITF imagery and metadata
- Orthorectifying imagery
- Creating an image mosaic
- Measuring features of interest
Mapping Water Lines of Communication
2 Hours
- Using spectral indices to highlight water
- Applying ROI thresholds
- Exporting ROI thresholds to classification images
Creating Topographic Products
2 Hours
- Creating shaded-relief images
- Categorizing slope percentage for drop zones
- Blending shaded-relief and electro-optical (EO) images
Mapping Relative Water Depth
1 Hour
- Creating relative water depth images
- Applying color tables to relative water depth images
Pan Sharpening of Panchromatic and Multispectral Imagery
1 Hour
- Visually comparing panchromatic and multispectral images
- Creating a pan-sharpened image to look for surface-to-air (SAM) missile sites
Extracting Building Footprints from Imagery
2 Hours
- Creating a segmentation image
- Creating a set of rules to extract buildings
- Exporting building footprints to a shapefile
Change Detection
2 Hours
- Visually comparing two images from different dates
- Using a guided workflow to create a difference image
- Creating a classification image of “new” and “fled” features
Building a Raster Series
2 Hours
- Building a raster time series from multiple images
- Creating a video animation from a raster time series
- Creating a temporal cube
Analyzing Low Light Imagery
2 Hours
- Working with VIIRS Day/Night Band (DNB) imagery
- Monitoring troop and vessel activity
Analyzing SAR Imagery
2 Hours
- Working with Capella Space SAR SICD imagery
- Visually interpret effects of shadow, layover, and foreshortening