Additional attributed may be added at the discretion of Consortium members. Each polygon will have an identifier that shall be unique both within and between organizations in the Consortium. Unincorporated areas will be coded 9999. Coded as C if construction-related restrictions for an extended period. In addition, the ELEV attribute was deleted since elevation changes continuously along each road segment and is not meaningful for the pavement coverage.
USGS maps use symbology to distinguish five classes of roads plus trails.
Other attributes may be added to facilitate pavement management at the discretion of Consortium members. The pavement coverage generated by Woolpert in 1995 will be quality checked and attributed by Bruton Center staff with the exception of the pavement management attributes. Updates to the pavement coverage are desired with each update of the digital orthoimage base map, which is currently on a two-year data collection schedule. Since this data layer is optional, no maintenance schedule will be published in this standard.