> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kinetica.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Data File DC

The `dc_shape` dataset is a HERE dataset and is analogous to most road network
datasets you could find in that it includes columns for the type of road, the
average speed, the direction of the road, a WKT linestring for its geographic
location, a unique ID integer for the road, and more. The graph used in the
example is created with two columns from the `dc_shape` dataset:

* `shape` -- a WKT linestring composed of points that make up various streets,
  roads, highways, alleyways, and footpaths throughout Washington, D.C.
* `direction` -- an integer column that conveys information about the
  directionality of the road, with forward meaning the direction in which
  the way is drawn in OSM and backward being the opposite direction:

  * `0` -- a forward one-way road
  * `1` -- a two-way road
  * `2` -- a backward one-way road

You'll notice later that the `shape` column is also part of an inline
calculation for distance as *weight* during graph creation using
the `ST_LENGTH` and `ST_NPOINTS`
[geospatial functions](/content/location_intelligence/geo_functions).