A. North Slider: The North slider is used to interact with the principal data only (see also Using Maps).
About Sliders
There are 3 sliders in Dynamic Choropleth Maps: The North slider (which is used to interact with the principal map data) and the East and South sliders (which interact with secondary data to filter the principal data. See also D. East and C. South slider).
Sliders have four (4) percentiles above and three (3) percentages below. Slider end-points are used to control data percentages, while the percentiles are calculated automatically.
The North slider can be moved like a scroll bar by clicking on the yellow section and holding down the mouse button and dragging left or right. This will keep the yellow section the same size and resize the cyan and red sections. In addition, you can resize the yellow section by placing the mouse over one end, holding down the mouse button and dragging the dividing point left or right. Move the mouse over the a percentile to see the associated map area, which will turn white (see also H. Rollovers).The extreme values of data can be shown by moving the lower end-point of the cyan band to the left. For example, to isolate the 10% of counties with the highest data values, move the lower end-point of the red band to the right until the percentage is 10%. The three color bands (cyan, yellow and red) can be reduced to two, or one, by merging the slider end-points.
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B. Data Selection Box
The data selection box contains all selectable data topics (see also F. Select Data). To select data, click on a topic in the data selection box and click one of the three map titles to drop the data into the map (see also C. Map Titles). Note: Dynamic Choropleth Maps software uses both county and health service area as geographic mapping units. Other units such as Hydrologic Unit Codes (HUCS) could be applied as well (see also About DC Maps Software).
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C.
Map Titles
There are three map titles. They are located in the North, East and South positions, on the inside of the North, East and South sliders, just above the map display area. Map titles represent the principal and secondary data that have been dropped into the map (see also Using Maps). The default map titles are North: Long Cancer Mortality, 1997 (rate per 100,000); East: Percent Below Poverty Level; South: Percent Black 1997. To drop data into the map title, click on the topic in the data selection box. Click one of the three map titles to drop the data into the map (see also B. Data Selection).
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D. East Slider (and South)
The East and South sliders filter the principal data (see also Using Maps). Check the East/and or South slider checkbox (see also L. Slider Activation) to activate the slider. Scroll the end-points to filter the principal data. When the check box next to the slider is checked, the filter is active. When the slider activation check box is unchecked, the filter has no effect. Note: The South and East sliders can be used simultaneously, or one at a time, using the check boxes
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E. History Arrows
You can recall maps by clicking the left and right history arrows. This function is similar to the browser history feature. Each rendered map is stored in the history and can be recalled by using the left and right history arrows.
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F. Select Data
After you have chosen a topic from the data selection box, click the topic to highlight it and then select the map title to drop the data into the map (see also Quick Start Guide).
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G. Analyzer
The analyzer transforms data using mathematical expressions and Boolean logic (see also Using Maps and Tutorial).To access the Analyzer, place the cursor over the map and right-click the mouse to bring up the popup tools menu. Select the Analyzer from the popup menu.
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H. Rollovers
Roll the mouse over the map to view county specific data. Note that the data is listed in the following order: 1. Principal Data (North Slider) 2. Secondary Data (East Slider) 3. Secondary Data (South Slider). For details on primary and secondary map data components see also Using DC Maps.).
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I. Hot Spots
Roll the mouse over any of the slider percentiles to identify the associated counties, which will be highlighted in white.
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J. Download Data and Metadata
Right-click the mouse on a data item in the data selection box then select Download to load the file into a new browser window, or select Metadata to bring up metadata information about the data item.
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K. Tools Popup menu access (Drill Down)
Move the mouse over a county and Right-click the mouse to bring up the pop-up menu from which you can drill down to get more information about the topic and access online reports specific to that area. Reports are available from TRI Explorer, Enviromapper, Census and Fed Stats (see also Metadata).
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L. Slider Activation
Click the South and/or East sliders checkbox to activate/deactivate the filter. To resize the sliding scale, place the mouse over one of the ends and drag it to the new position. The mouse pointer changes to a splitter when the mouse is placed over a slider end.
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 Using the Mouse
Zoom
To zoom into a 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.
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Map Title(s)
The cursor changes to a “hand” when the mouse is moved over one of the three map titles. This indicates that the data selected in the data selection box can be dropped into the map see also C. Map Titles, F. Select Data and Point and Click).
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Hot Spots
Move the mouse over the slider (s) to highlight the counties that match the selected percentiles (see also I. Hot Spots).
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Point and Click
To drop data into the map, click a dataset in the data selection box and then click one of the three map titles (see also F. Select Data).
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Access Online Reports (Drill Down)
To drill down for more information and to access an online reports, place the cursor over the map and right-click the mouse. A online report access pop-up menu is displayed. From the online report access menu, you can select reports specific to a county (see also K. Tools Popup Menu Access).
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