Web-based Image Viewer3.0

General Information

Open and reorder multi-temporal image themes (layers), label attribute of date is updated automatically

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 green 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 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

Click this icon to removes all points, lines and polygons on the image.

Turn on-screen coordinate display visible and invisible

Move left slider to blend/fade the middle image, right slider to blend/fade the top image. When the applet is initialized, move the right slider first instead of the left, because the top image cover the middle and bottom image.

Web-based Image Viewer 3.0 is an on-line analytical tool for displaying and manipulating image layers, geographic points, lines and polygons. Image Viewer 3.0 is designed to scale very high resolution imagery into fine details, perform real-time interactive image analysis and visualization with enhanced GIS functionality over the web.

Features Include .......

Exploit and compare multiple image themes (layers) with interactive blend/fade controls
Re-order image themes(layers) and label attributes
vector, raster, transparent raster data are all fully supported
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
On-screen digitizing and draw boundary
Geo-referenced Imagery with on-screen coordinate info display

Data Description (Image credit "Space Imaging")

This one-meter resolution satellite image of Manhattan, New York was taken on Sept. 4, 2002 by the IKONOS satellite. The image shows the 16-acre site of Ground Zero approximately one year after the fateful attacks. A large ramp descends into the center of the site next to where the North and South Towers once stood.

This one-meter resolution satellite image of Manhattan, New York was taken on June 8, 2002 by the IKONOS satellite. The image shows the immense progress in the reclamation of Ground Zero in just nine months. The image was taken from the west and may be rotated for better viewing.

This one-meter resolution satellite image was taken on Jan. 22, 2002 by the IKONOS satellite. It shows the continuing cleanup effort six months after the attack on the 110-story World Trade Center twin towers. Snow can been seen throughout Manhattan including Ground Zero. The severe shadows are due to the winter sun angle.

This one-meter resolution satellite image was taken on Dec. 31, 2001 by the IKONOS satellite to show cleanup efforts of the World Trade Center site on the last day of the year. It shows a macro view of the immense cleanup effort following the destruction of the 1,350-foot towers. Construction equipment, including multiple cranes, can be seen throughout the ground zero site. The severe shadows are due to the winter sun angle.

This one-meter resolution satellite image of Manhattan, New York was collected at 11:54 a.m. EDT on Saturday, Sept. 15, 2001 by Space Imaging's IKONOS satellite. The image shows the remains of the 1,350-foot towers of the World Trade Center, and the debris and dust that have settled in the area. Emergency and rescue vehicles can be seen throughout the streets in the vicinity of Ground Zero. Smoke from fires is still visible four days after the attack.

This one-meter resolution satellite image of Manhattan, New York was collected June 30, 2000 by Space Imaging's IKONOS satellite. The image, taken from the south, prominently features the 110-story World Trade Center twin towers.