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More Information
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Help Document
•
Frequent Q & A
Web
GeoViewer (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
- Brush multiple objects on the fly
- Select feature records in the table and highlight on the map
- Direct
search attribute value in the geodatabase
- 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 (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, polygon or selected features 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.
Select geographic features by dragging a rectangle around them, all visible
GIS layers within the box will be highlighted. To deselect selected features,
click or drag the mouse where there are no features.
Before you open a layer's attribute table, 1) Turn the layer check box
on 
. 2) make the layer active
(bevel border).
3) highlight the layer using select feature icon
that you wish to see the attributes.
Tip:
1. When you select feature records in a
attribute
table, the feature highlights on the map
2.
To select consecutive records in a table, click and drag the mouse up
or down
3. Press and hold the Ctrl key while clicking additional records
4. Click Ctrl+A
to select
all the records in the attribute table
Click to open a search dialog box. Type the attribute value of interest
in the text field, and then click the find button to search for the attribute
in geo-database. The found features will list in the results window and
click to highlight features on the map.
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 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
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.
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)
