Description: Driveway centerlines and access routes to structures and site addresses to supplement the County's existing road centerlines database. Driveways and primary access routes were digitized for all building outlines in the current County GIS except those directly adjacent to and directly accessed from the nearest road centerline. Structures were considered to be "directly adjacent" to a road if they were within approximately 75 to 100 feet of the GIS road centerline. Features were digitized from aerial photography using stereo photogrammetric mapping technologies and were interpreted within the constraints of that technology and the visibility of features on the photography. No field verification or other research was conducted to verify location of driveways in obscured areas or that driveways shown are drivable or free of obstacles. Existing County aerial photography ranging in date from 2001 through 2003 was used. Photo scales ranged from 1"=1000' (immediate Medford vicinity) to 1"=2000' (remaining areas). In areas covered by multiple flight, the most current flight was used. Specific photo boundaries, flight dates and photo scale information for the photography used for this project can be found in the index shape file: Date_of_aerial_photo.shp Surface type was attributed as paved, unpaved or unsure of surface. A secondary attribute was added to the layer names to indicate if the feature was extracted from the old County centerlines file. The surface type for features in the County centerline file appears to have been verified and would have a higher degree of reliability than surface type interpreted from the aerial imagery. Driveway vector data represents the interpolated centerline between driveway edges or the centerline of a clearly defined route. Parking vector data represents only a generalized route intended to show primary access from County road centerlines.
Service Item Id: cdca8915243e491388b180ef696b5667
Copyright Text: Please extend credit to Jackson County GIS in any subsequent works derived from its data, such as maps.