| WashCOGIS.GIS.Transportation | |
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Data format: SDE Feature Dataset File or table name: WashCOGIS.GIS.Transportation Coordinate system: State Plane Coordinate System Theme keywords: Foundational Elements, Road Centerlines, Addresses |
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Abstract:
The transportation dataset includes road centerlines, address points, and related features. The data was derived from many sources. Road Centerline data was first acquired by screen digitizing roads using 1995 orthophotography. Major improvement projects were completed when new orthophotography was acquired in 2000 and again in 2005. Washington County actively maintains road centerline data for all areas except the City of West Bend. Address point data was first acquired from a variety of sources in 2006. Washington County actively maintains situs address points for all areas except the City of West Bend. The City of West Bend maintains address points and road centerlines for their municipality in a format nearly identical to that used by Washington County. The countywide dataset is obtained when combing the City and County data. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
The transportation dataset includes road centerlines, address points, and related features. The data was derived from many sources. Road Centerline data was first acquired by screen digitizing roads using 1995 orthophotography. Major improvement projects were completed when new orthophotography was acquired in 2000 and again in 2005. Washington County actively maintains road centerline data for all areas except the City of West Bend. Address point data was first acquired from a variety of sources in 2006. Washington County actively maintains situs address points for all areas except the City of West Bend. The City of West Bend maintains address points and road centerlines for their municipality in a format nearly identical to that used by Washington County. The countywide dataset is obtained when combing the City and County data.
The primary purpose of the road centerline data is cartographic mapping and address geocoding. Routing applications are planned. The primary purpose of the situs address points is for use within the Washington County Sheriff Department dispatch center and other address geocoding applications.
publication date
This data is for informational use only and is not intended to be a substitute for a land or engineering survey.
333 E Washington Street
PO BOX 2003
All attributes have been checked for accuracy and are believed to be correct. Road names and address ranges were verified against the MSAG and in some cases existing road and address maps maintained by each local municipality. When possible, data are compared to accepted values or domains. All errors are flagged and manually corrected.
All features have been verified to be topologically correct with nodes at all at-grade intersections. Any duplicate or coincident linework has been removed. There are no overshoots or undershoots. Washington County has worked with the City of West Bend to clearly define areas of mapping responsibility to reduce edge matching issues when the data are combined.
This dataset is believed to include all drivable roads and ramps in Washington County with the exception of the City of West Bend. Washington County makes every effort to find existing and new addresses. Because Washington County does not assign addresses this task is difficult and some addresses may have been missed. The City of West Bend data is periodically updated from records maintained by the City of West Bend Community Development Department. City data obtained from the County may not be as current as the remainder of the County. For the most current City of West Bend information contact the City directly.
Horizontal accuracy is dependent on the quality and accuracy of the source orthophotography and the individual doing the on-screen digitizing. New roads are generally added based on the location of the right of way, if the road is not constructed in the center of the right of way the digitized centerline will be off. In some cases a structure could not be seen on orthophotography for a known valid address, in these cases the address point was placed on the visible driveway entrance or the center of the parcel.
Digital Orthophotography used to screen digitize and geographically place features.
Some site address information, linked to property parcels
Valid addresses located in Washington County and their approximate location.
Road centerlines and address points maintained by the City of West Bend. These data are not checked by Washington County and needed to complete a countywide coverage.
Digital 1 meter resolution aerial imagery acquired during the summer of 2008 (leaf-on).
Road Centerline Creation Phase I: A county wide road map was generated in AutoCad Map 2000i using the 1995 digital raster orthophotographs to capture centerlines of all major highways, town roads, city streets and ramps. The centerlines were then tagged with the appropriate attributes. Alleys, driveways, field entrances and cul-du-sacs were captured as geographic elements without attributes. This project was completed through a contract with Ruekert|Mielke. Roads in the City of West Bend were not included in this project.
Road Centerline Creation Phase II: All road features were updated based on 2000 orthophotography. All new road features since the last capture were added to the existing map, which was redelivered in its entirety. All graphic features were converted from AutoCAD DWG to MicroStation DGN file format. The attribute features for the centerlines were added to the existing MGE project using ASCII Loader. The other features (driveway, cul-de-sac, field entrance, and alleys) were tagged with the appropriate feature tags only, and did not include additional attributes in the database. This project was completed through a contract with Ruekert|Mielke. Roads in the City of West Bend were not included in this project.
Road centerline data were maintained by the Washington County Planning and Parks Department, GIS Division. As subdivisions, certified survey maps, and condominiums were recorded, the roads contained within were estimated by splitting the right of way. Field entrances, cul-de-sacs, alleys, driveways were not updated.
The Washington County Planning and Parks Department, GIS Division migrated all data to ESRI software and formats. Created topological rules and verified the topological integrity of the road centerline data. Field entrances, cul-de-sacs, alleys, driveways were migrated to ESRI, but not updated. Intergraph GeoMedia software was used to pass the data from MGE to ESRI.
The Washington County Planning and Parks Department completed a major initiative to update all road centerline data to match the 2005 orthophotography. No effort was made to update field entrances, cul-de-sacs, alleys, or driveways.
Road Centerline Cleanup/Address Point Creation Project: Road Centerline attributes including name, prefix and type were compared to the MSAG and updated as necessary. Centerline address ranges were compared to the MSAG to check if 1) centerline range is within the MSAG range for the street name, 2) centerline ranges do not have gaps or overlaps, 3) centerline ranges do not leave gaps or overlaps with MSAG ranges, 4) a single centerline feature range does not span multiple MSAG records. All identified errors were corrected. Check for any MSAG street name or ranges that are not represented in the centerline feature class. Add centerline feature or expand address range as necessary to match the MSAG record. To create the address point features, a structure point was created representing the center of the primary habitable building as seen on the 2005 orthophotography. The various sources of addresses were normalized. Where there was one address with location information and one structure point located on the parcel, the address was assigned to the structure point. All other structure points were assigned an address manually using the normalized address list and local address maps as a guide. Structure points still lacking an address were again compared to the source address lists. If the address could not be resolved, an on-site visit was conducted to verify the address. Any address remaining in the normalized list and the original list from Intrado not represented by an address point was flagged and manually resolved. In some cases the point for the ambiguous addresses were placed on the centerline at its theoretical location and not on a structure. This project was completed through a contract with RA Smith. As part of the project, major revisions to the transporation data schema were made.
Made major revisions to the transportation data model and migrated all data to that model. Validated road centerline data through the use of topological rules. Worked cooperatively with the City of West Bend on model design, defining areas of mapping responsibility, and edge matching issues.
Road centerline data is maintained by the Washington County Planning and Parks Department, GIS Division. As subdivisions, certified survey maps, and condominiums are recorded, the roads contained within were estimated by splitting the right of way. Field entrances, cul-de-sacs, alleys, driveways are not updated. Address points are created when known. Washington County does not assign addresses. The completeness of the updated address points is dependent on the information the local municipalities provide to the County. Railroad information was added by digitizing the center of track location as observed on orthophotography. Only the main lines are included. This dataset does not include railroad spurs. NAIP Imagery is sometimes used to verify the location of features constructed between the 2005 orthophotography acquisition and the most recent NAIP dataset.
The City of West Bend maintains road centerline and address point data for areas within the City. Periodically the West Bend data is purged from the countywide dataset and replaced with updated data provided by the City.
Entity information in this map includes road centerlines and address points which are actively maintained by Washington County. Railroad centerlines were created, but rarely updated. Additional information for alleys, driveways, field entrances and cu-du-sacs are included, but have not been updated since 2000. Road name and address attributes are maintained for road centerlines and address points.
See the Washington County transportation model for detailed information.
333 E Washington St Suite 2300
PO Box 2003
This information is not certified by Washington County. Any use/application of this information is the responsibility of the user and such use/application is at their own risk. Washington County disclaims all liability regarding fitness of the information for any use.
Geometries, and Metadata
Geometry, Attributes and Metadata
Geometry, attributes, relationships and metadata
Order by mail, e-mail, phone or in person. Payment must be received before data will be shipped. See the GIS data and Fees page at http://www.co.washington.wi.us/gis for additional information.
Any modification to a standard product constitutes a custom product. Custom products will be charged $45/hr (minimum 1 hour) plus the $75 standard charge. Contact the Washington County GIS, a division of the Planning and Parks Department for more information.
333 E Washington St Suite 2300
PO Box 2003