A road centerline layer is an essential piece of data for many GIS applications. They provide geometry to route vehicles along, they provide context to allow people to know what area of a city they are looking at.
Roads also rarely change so it is worth drawing well the first time rather than trying to scrape over the minimum standards and needing to redraw the road to higher standards in the future
1. Road centerlines should reach from intersection center to intersection center.
2. All curves in the road centerline should be tangential to the straight segments
3. All road features should be capped with a point that describes the type of intersection
4. There should be no vertices if there is no deflection in the road
5. Incorporate a linear referencing system
6. Include historic names as well as current road names
7. Traffic circles take a long time to draw
8. Ensure that the road does not double back on itself at a small scale
9. Ensure there are no gaps in the road or places that have two intersections that are very close to each other
10. Choose a consistent cul-de-sac standard
11. The cul-de-sac should be drawn in reference to the center of bulb
12. Choose a consistent method of dealing with traffic islands
13. Use a true curve if your database storage allows. Otherwise use a densify tool to ensure the vertices are placed consistently.
14. Try to place deflections in intersections
No comments.