3.8.1. Road structures. Rules for drawing and adding attributes.

“Road infrastructure” items include squares, bridges (including pedestrian bridges), underground and aboveground crosswalks, and tunnels.

Below you'll find: Rules for drawing road structures

When drawing road structures:
Road structures include squares, bridges (including those with proper names), the territories of large parking lots, bridges (including pedestrian ones), underground and aboveground pedestrian crosswalks, and tunnels. This also includes squares within localities that are intended for public events, are paved, and have a defined territory.
Draw road infrastructure items consistently, using polygons to represent structures.
When mapping road structures:
  • Enter bridge borders at the points when the bridge “rises off the ground”. Don't include the embankment in the polygon that represents the structure.

  • Draw the borders of tunnels at the point where the center of the roadbed descends underground. Do not round the edges of the tunnel that lead into the portal; draw them straight:


Road structures intended to provide a passage over bodies of water and consisting of pipes and embankment “should not” be categorized as “Bridges” or Tunnels.

The shape of polygons should match that of the actual structure; diagrams are not allowed.
Draw and edit “Road structures” using the techniques described in section 2.7.3. Simple polygonal items. Drawing bridges and aboveground pedestrian crosswalks

When drawing bridges and aboveground pedestrian crosswalks, pay attention to the fact that the bridge floor or crossing may be displaced in the satellite image (in relation to its actual location). This is because it is elevated above the ground (see section Bridges).

The extent of this displacement (green arrows in drawing) may be significant enough to affect the position of the bridge road within the broader road network:

When drawing bridge polygons, try to align their borders with the road sections that go over the bridge. The bridge borders that run perpendicular to the traffic lanes should be placed at the beginning and ending points of the road section that runs over the bridge.

When drawing bridge polygons, the borders should align with the expansion joint where the bridge road connects to other road sections (if these are visible on a panorama or satellite image):

If you can't see the expansion joint, then draw the polygon based on the points where the bridge road rises from the ground (even if that will result in non-right angles):
When drawing internal polygons, follow 2.7.2. Rules for using internal polygons.

When drawing polygons of underground and aboveground pedestrian crosswalks, include all parts of the crosswalk: the descent or ascent and the underground or aboveground parts:

You should not exclude any sections of the crosswalk from the polygons because that would split it:

When drawing polygons of underground and aboveground pedestrian crosswalks, keep in mind that they should match up with the road sections that are marked as Pedestrian Crosswalks, as well as with the Pedestrian and bike paths class. Such polygons should also have Level A and B values that correspond with the item type (“+1” for aboveground and “-1” for underground crosswalks).

Draw squares and their borders based on building facades. If there are no facades, then base your drawing on the outer edges of the roadways that border the square:

If there is a named “square”, and nothing remains of that road structure but there are addresses linked to that square that are located along a named road of class 7 or higher, than enter the square name for that road (as a “street in locality” type) and don't duplicate it as a road structure.

For example, Freedom Square in Astrakhan: Rules for adding attributes to road structures

The attribute panel for a road structure looks like this:

Rules for adding attributes to road structures: Type

Select the item type from the list:

  • Bridge
  • Tunnel
  • Square (lot)
  • Aboveground pedestrian crosswalk
  • Underground pedestrian crosswalk
  • Pedestrian bridge Name
Assign names for road structures in accordance with the general rules (see 3.1.3. Map item naming rules.
If a bridge or tunnel has a proper name, then enter it for the “road structure” as well as for the section of road that passes over it (see also point
Road structures may not have names.