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1-foot Resolution Imagery:
The aerial photography will be
acquired in the spring of 2005 at a
scale of 1:20,000 (1"=1666'). The
aerial photographs were used to
create 1"=200' scale digital
orthophotos at one-foot ground
resolution covering all of Dane
County, projected to the Dane County
Coordinate System, and were divided
into 313 four-square mile tiles.
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Coverage Area: |
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Dane County. |
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6-inch Resolution Imagery:
The aerial photography was acquired
in the spring of 2005 at a scale of
1:10,000 (1"=833'). The aerial
photographs were used to create
1"=100' scale digital orthophotos at
six-inch ground resolution covering
the majority of the urbanized areas
in Dane County and consists of 305
one-square mile tiles.
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Coverage Area: |
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4-Foot Contours:
The digital four-foot contours are a
vector data set developed from a
ten-foot spaced grid, digital
elevation model (DEM), with two-foot
vertical accuracy. The contour data
meets National Map Accuracy
standards.
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Coverage Area: |
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Dane County. |
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2-Foot Contours:
The digital two-foot contours are a
vector data set developed from a
densified digital elevation model
(DEM), with one-foot vertical
accuracy. The contours meet
National Map Accuracy standards.
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Coverage Area: |
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Terrain Data:
The DEM is a raster data set in ESRI
GRID format with an X, Y, Z value
located at the center of each 10ft.
by 10ft. cell. The DEM has a
ten-foot grid spacing with two-foot
vertical accuracy. The DEM supports
the development of four-foot
contours at National Map Accuracy
Standards. In 2005 only limited
updates will be made to the terrain
model in areas of significant
change.
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Coverage Area: |
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Graphic below shows areas of
updates |
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