This data set consists of digital map files containing road centerline information obtained primarily by conducting lab work using aerial imagery and other data sources. Features contained in the data set include all public and private named roads countywide and associated attributes. The Washburn County Land Information Office plans to maintain this digital data in ESRI's ArcGIS 9.x geodatabase environment using ArcMap tools. Some of the data was developed using field data collection techniques and field data collection will be used extensively to maintain the data. There are attributes in the data documenting the source for eachrecord.
There are numerous reasons for developing the road centerline feature class. 1) Existing address documentation; 2) Enhance methodology to issue new addresses; 3) Provide locational information for emergency services within Washburn County; 4) Publish hard copy map products like platbooks and emergency services atlases 5) Help maintain accurate parcel addresses in the property tax database; 6) Help improve the accuracy of the MSAG and ANI/ALI databases 7) Affix road ranges so the road centerlines can be used to geocode or locate based on addresses 8) There are many other uses in other County Departments
This data set was created as a foundational element for the Washburn County Land Information System. The road centerline feature class provides a digital representation of all public and named roads within Washbun County and is to be used in conjunction with developed digital building, site access, and driveway feature classes. The road centerline feature class was intended to be used to enhance addressing and 911 dispatch services within the County.
Time Period
This information was prepared by using a myriad of data resources and is NOT to be used exclusively to describe all actual road centerlines. All distributed digital data is transferred to the user with Washburn County's Disclaimer of Warranty. Contact either the Washburn County Land Information Department or Washburn County GIS Specialist, Nathan Nelson, for additional access contraints pertaining to the data set.
All information has been checked for accuracy and is correct to the best of Washburn County's knowledge. Road centerline validation for the feature class was conducted using a variety of existing layers and tabular data. In addition, scanned, spatially adjusted, hardcopy, mylar plat maps that contained address and road centerline information were used as the foundational source for digitally creating the road centerlines within Washburn County. Other analysis conducted consisted of MSAG road name comparisons, gas tax maps, existing roads GIS layer, and aerial imagery.
To the best knowledge of Washburn County, this data set includes all of the roads within Washburn County, Wisconsin. The data, however, is dynamic and therefore will have to be maintained on a regular basis. Because of the dynamic nature of the data, the data should never be construed as 100 percent complete.
Washburn County's road GIS layer originally was produced from older imagery and contained very few attributes. The attributes that were present with the older file were not verified and contained some errors. This GIS layer was provided to another vendor. These centerlines were compared with the roads as viewed on the newer 2004 aerial orthophotos and 2005 NAIP color photos. The road arcs were moved where ever it was noted the road arcs did not align adequately. Forest roads and firelane routes were provided as digital files from the Washburn County Forestry Dept and incorporated into the centerline layer. These roads were coarsely GPS'ed and vertices were altered on a limited basis. These forest and firelane roads may not align perfectly with the aerial imagery.
Provided all of the horizontal and location information for the road centerlines
Used imagery as backdrop to QC existing road centerlines
Roads were moved when necessary to align with the imagery.
Identified missing roads were digitized and confirmed by MSAG, mylar plat maps, addresses, and new address request forms
Once the roads were complete they were checked for directionality and segmented by MCD, ESZ, and ZIP CODE.
Address ranges were added by computing the adjacent address values and calulating the beginning odd and even values and the ending odd and even values.
QC processes were used to confirm road range values were correct.
Internal feature number.
ESRI
Unique road ID
Highway designation
Owner or jurisdiction
Private, Town, City, County, US Hwy, State Hwy Roads
Road owner or jurisdiction
Street Address Prefix Direction
Washburn County
North, East, West, and South (Compass Direction)
Existing road name data sources such as gas tax maps and mylar plat maps.
left low address range
Street type
Washburn County
Alley, Avenue, Boulevard, Court, Drive, Lane, Loop, Path, Plaisa, Road, Spur, Street, Trail, Way, & Other
Combination of existing methodolgy within the county and US Postal Service Standards
Feature geometry.
ESRI
Road centerline Arc_ID
Washburn County
Wisconsin
Washburn County
left high address value
Street name
Washburn County
right low address value
right high address value
left address range alpha prefix N, W
Street name portion of address
Washburn County
right address range alpha prefix N, W
Washburn County
Washburn County
compass direction of road arc
left emergency service number
right emergency service numbers
left municipality
right municipality
alternate road name
Length of feature in internal units.
ESRI
Contact Nathan Nelson at Washburn County for information regarding distribution liability
PO Box 649, 10 Fourth Av