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Layer
Visibility
The layers have scale-dependent visibility parameters. A layer
will be in the layer list, available for displaying based on the scale of the
map. For example, the Wells layer is not in the layer list when starting County
Well Index Online. The Wells will show up on the layer list and visible when
the map scale is at 1:100,000 or less. To make a layer visible, make sure that
the there is a check in the check box to the left of the layer name under the
Visible header. To turn off a layer's visiblity uncheck the visible checkbox
and click the refresh map button. To turn on a layer's visiblility, check the
visible checkbox and click the refresh map button. Layers are drawn in order
from bottom to top of the layer list. If you make the 2003 Color Air Photos
(Zone 15) and the 7.5 Minute quadrangles layers both visible, on your map you
will only see the 2003 Color Air Photos (Zone 15) because it overlays (draws on
top off) the 7.5 Minute Quadrangle layer.
Note:
The Streets layer will show in the layer list at a scale below 1:40,000 but
will not display on the map. This is so street labels can be made available at
a scale be low 1:40,000.
 Layer
names that are italic and underlined found in the Layer List are
links to the Minnesota Department of Health's website with more
information regarding that layer. Click to open up a browser
to the web page.
Labeling
Map Layers
Labels are
available for four layers and are scale-dependent. To label a layer check the
Label checkbox to the right of the Visible checkbox and click the Refresh Map
button. To turn off labels uncheck the Label checkbox and click the Refresh Map
button.
Available Layers with
Labels
| Layer |
Label |
Label
Visibility Scale |
| Wells |
Minnesota Unique Well Number |
below 1:50,000 |
| County |
County Name |
Always available |
| Township, Range and
Sections |
Township, range, range
direction, and section number |
below 1:90,000 |
| Streets |
Street Name |
1:1,000 - 1:40,000
|
| Wellhead Protection
Areas |
Wellhead Name |
1:1,500 - 1:100,000
|
| Special Well Construction Areas |
Name |
1:1,500 - 1:100,000
|
| Cities and Townships
Labels |
Name |
below 1:200,000
|
Available Map
Layers
Below is a list of map layers describing the layer. Visibilty Scale for the
layer and labels is the minimum to the maximum
| Layer
Name |
Description |
Visibility
Scale |
Labels |
| Wells |
This is the County Well Index
database with field verified well locations. This INCLUDES Public Water
Supply wells. |
1:1,000 -
1:100,000 |
YES |
| County |
Minnesota County boundaries |
Always available |
YES |
| Township, Range and
Sections |
Minnesota Public Land Survey
boundaires |
below 1:200,000 |
YES |
| Streets |
Tiger 2000 streets |
1:40,000 -
1:200,000 |
YES |
|
Wellhead Protection Areas
|
Minnesota Department of Health
approved surface and subsurface area surrounding a public water supply well
that completely contains the scientifically calculated wellhead protection area
and is managed by the entity identified in a wellhead protection plan. The
boundaries of the drinking water supply management area are delineated by
identifiable physical features, landmarks or political and administrative
boundaries.For more
information contact the Source Water Protection Unit at 651-201-4700
or click more info..
|
1:1,500-
1:400,000 |
YES |
|
Special Well
Construction Areas
|
A Special Well Construction Area
is sometimes also called a well advisory. It is a mechanism which provides for
controls on the drilling or alteration of public and private water supply
wells, and monitoring wells in an area where groundwater contamination has, or
may, result in risks to the public health. The purposes of a Special Well
Construction Area are to inform the public of potential health risks in areas
of groundwater contamination, provide for the construction of safe water
supplies, and prevent the spread of contamination due to the improper drilling
of wells or borings. For
more information contact Well Management at 651-201-4600 or
click more info..
|
1:1,500 -
1:200,000 |
YES |
| Water Bodies |
Lakes and Rivers |
1:40,000 -
1:300,000 |
NO |
| Streams, Rivers |
Streams, rivers, ditches |
1:40,000 -
1:300,000 |
NO |
| 2003 Color air
Photos (Zone14) |
NAIP 2003 Color air photos in
MrSID format
UTM zone 14 |
1:1,500 -
1:40,000 |
NA |
| 2003 Color air
Photos (Zone15) |
NAIP 2003 Color air photos in
MrSID format
UTM zone 15 |
1:1,500 -
1:40,000 |
NA |
| 7.5 Minute
Quadrangeles |
USGS Digitial Raster Graphics
of the 7.5 minute Topographic Quadrangels |
1:5,000 -
1:24,000 |
NA |
| Shaded Relief |
Shaded Relief of Minnesota
Derived from the Digital Elevation Model |
Always available |
NA |
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