This page contains
help instruction for the GIS application.
The LEAN GIS Application
is an easy-to-use internet based Geographic Information System (GIS)
designed to help public health and other professionals use maps to create
visual, geographic representations of existing data. (Go to GIS
Data to learn about LEAN GIS data layers.) This tool allows users
to turn symbolized data layers on and off, to pan and zoom, and to display
information about data layer item(s).
Data Layers
Drawing Layers
Redraw
Reset
Legend
Statewide View
Zoom In/Zoom Out
Panning
Identify
List Data
Zoom To
Data
Layers
Left side
of screen.
Data layers are GIS (spatial) data such as LEAN Regions or Census Blocks
that are symbolized based on various attributes, such as the number
of Food Stamp Recipients or the predominant ethnic group of the Census
Block. Refer to the GIS Data
section for more information about each data layer.
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Drawing
Layers
To turn layers on
or off simply check the box next to the data layer name on or off and
then click the Redraw button at the bottom of the list of layers. (Note:
You can turn multiple layers on or off before redrawing the map.)
Keep in mind that
it does not make sense to have certain combinations of layers turned
on. For example Major Cities can be seen on top of FS Recipient Density,
but FS Recipient Density will completely cover Number of FS Recipients.
Layers that are higher on the legend draw before layers lower on the
legend.
Visibility of Census
Block-based layers is also subject to a scale threshold. If zoomed (see
Zoom
In/Zoom Out) out too far, these layers take a long time to draw
and the detail cannot be seen.
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Redraw
Left side
of screen below list of data layers.
The redraw function redraws the map at the current scale including all
data layer with the checkbox checked.
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Reset
Left side
of screen below "Redraw" button.
The reset function draws the map with its starting configuration. (i.e.
Statewide View with only the LEAN Regions data layer turned on.
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Legend
Top Right
side of screen.
Lists active data layers on the map with corresponding symbols.
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Statewide
View
Middle
right side of screen.
Sets the map extent to include the entire state. To reset the map to
Statewide View, simply check the button to the left of the Statewide
View function, then click on the map.
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Zoom
In/Zoom Out
Middle
right side of screen.
To zoom in or out simply select the Zoom Factor (2x, 4x, 8x) check the
button to the left of the appropriate function ("Zoom In" or "Zoom Out"),
and click map. The center of the new map extent will be the location
where the map was clicked.
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Panning
Middle
right side of screen.
To Pan, check the button to the left of the Pan function and click the
on the map location you want centered. The location you click on the
map will become the center of the map.
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Identify
Middle
right side of screen.
The Identify Function displays a table of information for a specific
data layer item. To identify an item, simply check the button to the
left of the identify function, select the data layer of the item you
wish to identify from the drop-down list, click the data layer item
on the map. The identified item will be highlighted in red. A table
should popup that displays the data associated with the data layer item
you selected. To remove the highlighting click the Reset Identify button.
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List
Data
Bottom
right side of screen.
The List Data Function displays a table of information for all the items
in a specific data layer. To list layer data, simply select the correct
data layer from the drop-down list and click the List Data button.
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Zoom
To
Bottom
right side of screen.
There are three "Zoom To" options: Zoom to County, Zoom to LEAN Region
and Zoom to Zip Code. To zoom to a county, simply select the county
from the drop-down list and click on the Counties button. To zoom to
a lEAN region, simply select the region from the drop-down list and
click on the LEAN Regions button. To zoom to a zip code region, enter
the 5 digit zip code in the box provided and click on the Zip Codes
button.
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Go
to GIS
