The DelDOT Centerline file is a digital, spatial representation of the State of Delaware's statewide transportation network. DelDOT's cartographic unit initially digitized the centerline file using USGS Quad Maps as the baseline. After aerial photography was acquired in 1992, it was visually matched against the 1:12,000 scale orthophotography. The process was repeated in 1997 with the 1:12000 scale photography acquired that year and again in 2002 with the new 1:2400 scale photography
The Centerline File is attributed with the following information:
| Attribute | Description |
|---|---|
| RDWAY_ID | Internal control key used by the DOT |
| CTY | County Identifier (1 - New Castle, 2 - Kent, 3 - Sussex) |
| BEG_MP | The beginning mile-point of the segment |
| END_MP | The ending mile-point of the segment |
| MAINT_RD | The county road number of the segment, assigned by DelDOT Planning's Road Inventory unit for all State Maintained Roads |
| PRE_DIR | Prefix in full road name designating direction |
| STREET_NAM | Name of Road |
| STREET_TYPE | Type of road |
| SUF_DIR | Suffix in full road name designating direction |
It is in State Plane North American 1983 Delaware (Meters) Projection.
- Download the Centerline File (Updated June 2014)
DelDOT Routes File
The DelDOT Routes file is a digital, spatial representation of the State of Delaware's routes system. There are three distinct types of routes in this state: 1.) Interstate, 2.) United States, and 3.) State. It is maintained at DelDOT as an event table based on the Centerline file.
The Routes File is attributed with the following information:
| Attribute | Description |
|---|---|
| RDWAY_ID | Internal control key used by the DOT |
| CTY | County Identifier (1 - New Castle, 2 - Kent, 3 - Sussex) |
| BEG_MP | The beginning mile-point of the segment |
| END_MP | The ending mile-point of the segment |
| MAINT_RD | The county road number of the segment, assigned by DelDOT Planning's Road Inventory unit for all State Maintained Roads |
| ROUTE_ID | Abbreviation of route type plus route number |
| ROUTE_TYPE | Type of route (State, United States, or Interstate) |
| ROUTE_NUMBER | The State, United States, or Interstate Route number assigned to the route. |
It is in State Plane North American 1983 Delaware (Meters) Projection.
- Download the Routes File (Updated June 2014)
DelDOT Intersections File
The DelDOT Intersections file is a digital, spatial representation of all of the intersections of 2 or more roads in the statewide transportation network. A road in Delaware's statewide transportation network is defined as one that has been inventoried and has a Rdway_ID. This file was originally created in August of 2011 using ArcGIS and Oracle.
The Intersections File is attributed with the following information:
| Attribute | Description |
|---|---|
| XCORD | X COORDINATE of intersection |
| YCORD | Y COORDINATE of intersection |
| RDWAY_ID1...RDWAY_ID9 | RDWAY_ID of one of the intersecting roads |
It is in State Plane North American 1983 Delaware (Meters) Projection.
- Download the Intersections File (Updated June 2014)
