Dynamic Choropleth Maps was designed as a data visualization tool and is intended to be
used for spatial analyses. A very extensive collection of county level data sets
has been integrated into this product to give users access to a full spectrum of key data from
Environmental to Demographic to Health. Visual associations or patterns
observed from data combinations may not necessarily imply a relationship; further
investigation is recommended.
You will need at least 1024x768 resolution to see the full map and slider controls.
Go to control panel to set resolution if needed. In IE or Mozilla you should also
press the F11 key for Full Screen, or select View from the browser menu bar then
select Full Screen. The applet is compliant with Java virtual machine 1.1 or later.
If your browser does not have the Java virtual machine you can obtain it by clicking
the link for "Get Java Virtual Machine."
If java is not working make sure Java is enabled in your browser. See Help->Quick
Start Guide for more information.
Zooming the map
The map uses point and zoom. To Zoom in at point on the map press and hold down the left mouse button.
Zooming stops when the mouse button is released.
To Zoom out to the full map click the mouse button.
Drilling Down in the map
Right click the mouse over the map to bring up a popup menu of web tools
into which you can drill down for more information specific to a county.
Data Download and metadata
Right click a data set in the data tree, then select download
to load the file into a browser window, or metadata to bring up metadata
information about the data.
Right click the map and select "Analyzer" to transform data and map it.
Data variables associated with the South, East, and North Sliders, are identified
as X,Y, and Z, respectively. A transformation of the form f(x,y,z) is assigned to
x, y, or z. The function f is formed using the operators +,-,*,/,^,(,). For example
z = 100 * (z-x)/x assigns z as the percent change of z with respect to x. A dialog box
will allow the transform to be input as well as an optional title. Click OK to map
the transformed data. See the tutorial for more information on this
The history buttons can be used for map history, just like browser history. The buttons
are above the data list box.
Use the check box in the upper left corner to activate the floating Legend. The Legend
window can be dragged by grabbing it. The Legend details will change in real-time as
the sliders are moved.|
Using Dynamic Choropleth Maps
Click the Help or Tutorial links for detailed instructions on using the software.
For further Information