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More Information
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Help Document
•
Frequent Q & A
Web
GeoViewer (Web-based Image Viewer 5.0) lets you:
Internet Mapping made easy
- Live
access raster and vector data
- Interactive toggle multiple GIS layers on and off
- Translucent filter layer for thematic mapping
- Dynamic identify any geographic feature and place
- Fully Customizable map composition, legend color and text
Internet Imaging made simple
-
Multi-temporal image themes comparison
with
interactive blend/fade 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
- 3D
rotated text label and image regional annotation
- On-screen
digitizing and boundary delineation
- Geo-referenced
Imagery with on-screen coordinate info display
General
Information for Web GeoViewer (Web-based Image Viewer 5.0)
Open
and reorder multi-temporal image themes (layers), date label 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 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
box, 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 remove all digitized
points,
line and polygon on the image.
Click this icon and move the mouse pointer over a feature you want to
identify. The features in any visible GIS layers under the pointer will
be identified.
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.
Click the mouse pointer on the display where you want to add the text,
a text dialog box will popup and type the text string in the text field,
choose the font name, style, size, color,
and rotation
angle for
the display.
Click to remove all the texts you added on the display
Turn
on-screen coordinate display visible and invisible
Click to open the help document
Click
the color button to change the GIS layer and legend color
Click
the check box to turn the GIS layer on and off
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 covers the middle and bottom
image.
Third Party
If you find any bugs or want to contribute code to the Image Viewer or Web GeoViewer, please feel free to contact Liang Guo (guo@rohan.sdsu.edu)
