Dane County (WI) 2005 Building Footprints

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

Title: Dane County (WI) 2005 Building Footprints
Abstract:
This dataset contains building polygon data for Dane County. The dataset consists of structures the size of a single car garage or larger for Dane County, WI excluding structures within the City of Madison. In the City of Madison, building polygons are included for structures the size of a duplex or larger.
Supplemental_Information:
Dataset consists of a polygon layer for buildings, used for habitation or work, the size of a single car garage or large throughout Dane County. For the City of Madison building footprint information was developed for structures the size of a duplex or larger. Building footprints for the cities of Stoughton, Sun Prairie, and Monona are based on year 2000 planimetric data development, with updates through Spring 2005.
  1. How should this data set be cited?

    Dane County Land Information Office, 20060623, Dane County (WI) 2005 Building Footprints: Dane County Land Information Office, Madison, WI.

    Online Links:

    • Server=LIO1-Data; Service=5151; Database=GIS; User=L; Version=sde.DEFAULT

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -89.847190
    East_Bounding_Coordinate: -88.995277
    North_Bounding_Coordinate: 43.310463
    South_Bounding_Coordinate: 42.838772

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 08-Apr-2005
    Time_of_Day: unknown
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: None
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (144009)
      • Point (4)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard_Parallel: 42.908333
      Standard_Parallel: 43.230556
      Longitude_of_Central_Meridian: -89.422222
      Latitude_of_Projection_Origin: 41.750000
      False_Easting: 811000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000125
      Ordinates (y-coordinates) are specified to the nearest 0.000125
      Planar coordinates are specified in survey feet

      The horizontal datum used is D_NAD_1983_HARN_Adj_WI_DN.
      The ellipsoid used is GRS_1980_Adj_WI_DN.
      The semi-major axis of the ellipsoid used is 6378407.621000.
      The flattening of the ellipsoid used is 1/298.269877.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    GIS.L.BuildingFootprint
    Building footprints extracted via photogrammetric means using aerial photography captured in Spring of 2005

    BUILDINGFOOTPRINTID
    Unique identification number (Source: Dane County LIO)

    SOURCE
    Data source for the footprint. (Source: Dane County LIO)

    METHOD
    Method used for data capture. (Source: Dane County LIO)

    ValueDefinition
    0Unknown
    1Photogrammetric
    2Digitized
    3Drawing

    FOOTPRINTTYPE
    How the outline was defined (Source: Dane County LIO)

    CARTOUSE
    Identified polygons that should and should not be displayed for cartographic presentation. (Source: Dane County LIO)

    ValueDefinition
    YesShow Feature
    NoDo not show feature

    GISAREA
    The size of a two-dimensional feature as measured and calculated by GIS (Source: Dane County LIO)

    DATECREATED
    The date the polygon was created (Source: Dane County LIO)

    DATEEDITED
    Date the polygon was edited (Source: Dane County LIO)

    EDITEDBY
    Name of the editor (Source: Dane County LIO)

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE.area
    Feature geometry. (Source: ESRI)

    SHAPE.len
    Feature geometry. (Source: ESRI)

    Entity_and_Attribute_Overview:
    The attribute information found in this dataset was collected by the Dane County Land Information Office (LIO).
    Entity_and_Attribute_Detail_Citation: Not available


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Dane County Land Information Office
    c/o Fred Iausly
    Senior GIS Analyst
    210 Martin Luther King Jr. Blvd; Room 360
    Madison, WI 53703
    USA

    (608) 266-4398 (voice)
    (608) 266-1242 (FAX)
    iausly@co.dane.wi.us

    Hours_of_Service: Normal Business Hours (8:00am - 4:30pm)
    Contact_Instructions:
    Additional Contact Persons: Tim Confare (Senior GIS Analyst) (608) 267-1598


Why was the data set created?

To provide a representation of buildings, for use in habitation or work, across much of Dane County. This dataset will support county departments managing or using building information and for future support of broad regional needs. This information is intended for cartographic use, general spatial analysis and as a spatial index to land related information. It is not intended for site specific analysis.


How was the data set created?

  1. From what previous works were the data drawn?

    Dane County (WI) 2005 AP (source 1 of 6)
    Associates, Ayres, Unpublished Material, Dane County (WI) 2005 1:20000 Scale BW Aerial Photography:.

    Source_Scale_Denominator: 2400
    Source_Contribution:
    The photo diapositives were digitally scanned at 15 microns and photogrammetrically processed to produce the final imagery and products.

    Dane County (WI) 2005 DTM (source 2 of 6)
    Associates, Ayres, Unpublished Material, Dane County (WI) 2005 Ground Control.

    Source_Scale_Denominator: 2400
    Source_Contribution:
    Ayres Associates, Madison, WI, under contract to Dane County, WI, developed a DTM as part of the Fly Dane 2005 project.

    City of Sun Prairie Building Footprints (source 3 of 6)
    City of Sun Prairie, Unknown, City of Sun Prairie Building Footprints.

    City of Monona Building Footprints (source 4 of 6)
    Monona, City of , Unknown, City of Monona Building Footprints.

    City of Stoughton Building Footprints (source 5 of 6)
    Stoughton, City of , Unknown, City of Stoughton Building Footprints.

    City of Sun Prairie Building Footprints (source 6 of 6)
    Madison, City of , Unknown, City of Madison Building Footprints.

    Source_Contribution:
    The City of Madison provided building footprint polygon data for structures the size of duplex or larger.

  2. How were the data generated, processed, and modified?

    Date: 2005 (process 1 of 4)
    The aerial photography was acquired April 8, 2005. The aerial photography was scanned at a 15 micron resolution. A ground solution was generated via digital photogrammetric aerotriangulation based upon an established ground survey network. The building rooflines were compiled using softcopy stereo-plotters. Data from individual stereo-models were merged and checked for topologic cleanliness. Dataset was then loaded into a polygonal feature class within Dane County's Personal Geodatabase framework.

    Person who carried out this activity:

    Ayres Associates
    1802 Pankratz St
    Madison, WI 53704-4069
    USA

    (608) 443-1200 (voice)
    (608) 443-1250 (FAX)

    Hours_of_Service: 8::00am - 5:00pm
    Date: 2006 (process 2 of 4)
    A review of the building footprint data was performed, visually comparing the polygons against the 1-foot resolution imagery. The review focused on the urban areas and a general review of rural areas.

    Person who carried out this activity:

    Dane County Land Information Office
    c/o Fred Iausly
    Senior GIS Analyst
    210 Martin Luther King Jr. Blvd; Room 360
    Madison, WI 53703
    USA

    (608) 266-4398 (voice)
    (608) 266-1242 (FAX)
    iausly@co.dane.wi.us

    Hours_of_Service: Normal Business Hours (8:00am - 4:30pm)
    Contact_Instructions:
    Additional Contact Persons: Tim Confare (Senior GIS Analyst) (608) 267-1598
    Date: 2006 (process 3 of 4)
    Building footprint polygons, provided by the City of Madison, were added to the County dataset. The polygon data was reviewed and polygons that overlapped with the County data were deleted. A unique BuildingFootprintID was generated and other attributes were coded. The polygon data was stitched into the County Building Footprint layer.

    Person who carried out this activity:

    Dane County Land Information Office
    c/o Fred Iausly
    Senior GIS Analyst
    210 Martin Luther King Jr. Blvd; Room 360
    Madison, WI 53703
    USA

    (608) 266-4398 (voice)
    (608) 266-1242 (FAX)
    iausly@co.dane.wi.us

    Hours_of_Service: Normal Business Hours (8:00am - 4:30pm)
    Contact_Instructions:
    Additional Contact Persons: Tim Confare (Senior GIS Analyst) (608)267-1598
    (process 4 of 4)
    Metadata imported.

    Data sources used in this process:

    • H:\Documents\METADATA\Dane County\xml\BuildingFootprints2005.xml

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Attribution accuracy is 100%

  2. How accurate are the geographic locations?

    The data set meets the National Map Accuracy Standards for the scale 1:2,400 (or 1"=200'). The horizontal accuracy is +/- 6.6 feet for well-defined points, at a ninety percent confidence level. (Fly Dane 2005 Digital Orthophotography Accuracy Report, Ayres Associates).

  3. How accurate are the heights or depths?

    No vertical accuracy is specified

  4. Where are the gaps in the data? What is missing?

    The data set is 100% percent complete through April 8, 2005 for all of Dane County outside the City of Madison. The dataset contains about X% of structure within the City of Madison.

  5. How consistent are the relationships among the observations, including topology?

    The data set is topologically structured polygon data with no gaps, slivers, or omissions.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: Data is copyright and licensed for use.
Use_Constraints:
Refer to the License Agreement for Dane County Digital Geographic Data Sets, <http://www.co.dane.wi.us/lio/gis/licenseaggreement.pdf>

  1. Who distributes the data set? (Distributor 1 of 1)

    Dane County Land Information Office
    c/o Fred Iausly
    Senior GIS Analyst
    210 Martin Luther King Jr. Blvd; Room 360
    Madison, WI 53703
    USA

    (608) 266-4398 (voice)
    (608) 266-1242 (FAX)
    iausly@co.dane.wi.us

    Hours_of_Service: Normal Business Hours (8:00am - 4:30pm)
    Contact_Instructions:
    Additional Contact Persons:: Tim Confare (Senior GIS Analyst) (608) 267-1598
  2. What's the catalog number I need to order this data set?

    Dane County Building Footprints

  3. What legal disclaimers am I supposed to read?

    The burden for determining 'fitness for use' rests entirely upon the requester/Licensee. Dane County and its co-producers will not be liable in any way for accuracy of the data or for uses other than intended. Dane County assumes no responsibility whatsoever for direct, indirect, special, consequential, exemplary or other damages. Licensee agrees to indemnify, hold harmless and defend Dane County, its employees, agents, representatives and co-producers from any claims, damages, liabilities and expenses arising from Licensee's use of licensed data sets or products derived there from.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    An additional cost of $30/hour for staff time plus computer time and media charges is assessed for non-standard datasets or non-standard data file formats. Prices are subject to change without notice. For a list of Products/ Prices see <http://www.co.dane.wi.us/lio/datacatalog.asp>. Data can be order online using the Dane County GIS Data Order Form, <http://www.co.dane.wi.us/lio/Gis/townbundle.htm>. Fill out the online License Agreement for Dane County Digital Geographic Data Sets <http://www.co.dane.wi.us/lio/Gis/licenseaggreement.pdf>, providing licensing information and custom data requested. Mail or fax in the license agreement. A signed license agreement must be received before data can be released. All requests will be invoiced following delivery of the data.


Who wrote the metadata?

Dates:
Last modified: 22-Feb-2008
Last Reviewed: 22-Feb-2006
Metadata author:
Dane County Land Information Office
c/o Fred Iausly
Senior GIS Analyst
210 Martin Luther King Jr. Blvd; Room 360
Madison, WI 53709
USA

(608) 266-4398 (voice)
(608) 266-1242 (FAX)
iausly@co.dane.wi.us

Hours_of_Service: Normal Business Hours (8:00am - 4:30pm)
Contact_Instructions:
Additional Contact Persons: Tim Confare (Senior GIS Analyst) (608) 267-1598
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.8.6 on Fri Feb 22 14:02:50 2008