Roadway SubBlock represents the near-full extent of the District of Columbia's centerline network, excluding only driveways. It is the finest-grained base segment from which other segmentation patterns, including Blocks, can be constructed. The dataset includes streets, alleys, ramps, service roads, and trails, and is the original source for DDOT Street Centerlines data.
Use Cases
- Constructing custom road network segmentation patterns based on the base segments.
- Analyzing road types and network composition based on included streets, alleys, ramps, service roads, and trails.
- Integrating with DDOT Street Centerlines data as the original source features.
- Mapping and visualizing the near-full extent of the DC centerline network.
Strengths
- Dataset is the original source for DDOT Street Centerlines data.
- Includes multiple road types: streets, alleys, ramps, service roads, and trails.
- Available in multiple geospatial formats: KML, GeoJSON, ArcGIS REST API, OGC WMS.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- District of Columbia Department of Transportation (DDOT)
- Freshness
- Last updated 2026-03-25 08:35:39.341783; freshness should be verified.
- Geography
- Washington, DC