Features Include .......

• Multiple image themes (layers) exploit and comparison with interactive swipe controls
  
  
• Multi-linked overviewer and magnifier window with synchronized viewing
  
  
• Info Panel with on-line help, text description and history record
  
  
• Multiple Image layers arrangement
  
  
• Semantic zoom by rectangle, smooth pan and full extent functionality
  
  
• Real-time zoom (Animated zooming) in fine detail
  
  
• Area determination, perimeter calculation, and distance measurement
  
  
• Dynamic buffering zone around geographic point, line and polygon
  
  
• On-screen digitizing and draw boundary
  
  
• Geo-referenced Imagery with on-screen coordinate info display
  

General Information

Open and reorder multi-temporal image themes (layers)

Click and hold down mouse to drag a rectangle box to zoom in the area of interest

Click and hold down mouse to drag a rectangle box to zoom out

Drag the mouse upper-right to zoom in, lower left to zoom out

Click and drag the mouse to pan the image

Click to fit the image on screen to full view

Click and open the set units dialog box, change the length and area units used for display.

Click to measure point position in the displayed image

Click to measure length and segments in the displayed image. Left click the mouse to add a point in the image, draw a line representing the distance you want to measure, right click and drag the mouse to move a point. The length is the accumulative distance of line segments.

Click to measure perimeters and areas in the displayed image. Left click mouse pointer on image to add a point. Continue clicking to outline area of interest. Right click and drag the mouse to move a point

Digitize geographic point, line or polygon you want to buffer around first (the more vertices, the better), then click the buffer and popup buffer dialog, type the distance and select the units to create a buffer area around the feature, a buffer zone will be created at the distance you specified.

Click this icon to removes all points, line and polygon on the image.

Turn the magnifier window 2X on and off, drag the window to see a magnified view of a small area without changing the extent of your view

Turn on-screen coordinate display visible and invisible

Move the horizontal or vertical slider bar to control the swipe line and view portion of the top image over the bottom image

Data Description:

Top (Swipe) Image: The 2001 IKONOS image is a mosaic of multispectral IKONOS imagery acquired on May 30, 2001. The spatial resolution is 4 meters. The multispectral wavebands are blue (444-516 nm), green (506-595 nm), red (631-697 nm), and near-infrared (757-852 nm). Each waveband has 11 bit radiometric range.

Bottom Image: The 2000 IKONOS image is a mosaic of multispectal IKONOS imagery acquired on June 7 and June 29, 2000. The spatial resolution is 4 meters. The multispectral wavebands are blue (444-516 nm), green (506-595 nm), red (631-697 nm), and near-infrared (757-852 nm). Each waveband has 11 bit radiometric range.

This data was acquired for the purpose of evaluating the relationships between image-derived variables and habitat quality and change in quality.

This image has been converted from its native format (GeoTIFF) to ERDAS Imagine ".img" format and reprojected from UTM to State Plane by the Department of Geography at San Diego State University.