EuroSDR Projects - Host Ireland

14. How are road classes defined?
Based on a map object legend, e.g., highways, 1st class, 2nd class, etc.
Indirectly, by using road width or other attributes. Please specify which.
List all road classes used, including dirt agricultural roads, paths, bridges, etc., but excluding
railway lines and waterways.
according to ATKIS object catalog
15. What information is stored for road intersections? E.g., number of road segments
meeting at intersection, detailed topology for instance of individual lanes.
Intersections only for highways
16. Is the road data cartographically generalized?
yes no
17. Are bridges a separate class with start/end points? yes no
Are underpasses a separate class with start/end points? yes no
Are tunnels a separate class with start/end points? yes no
18. Is time information stored for the road data? yes no (approximately)
Is this the time of primary data acquisition, e.g., of the aerial imagery and/or time of road
extraction
19. In some cases of automatic and semi-automatic road extraction it is useful to extract
roads with different approaches depending on the land cover. Is the following data available
at your organization to determine the land cover?
- forest boundaries yes no
- boundaries of water surfaces yes no
- coastlines yes no
- boundaries of settlements (villages, towns) yes no
- outlines of buildings (possibly generalized) yes no
20. If you use semi-automated or automated methods for road extraction:
- do these methods provide accuracy measures? yes no
- do these methods provide reliability measures (e.g., road definitely correct, definitely
wrong, uncertain needing manual control)? yes no
If yes, how is the reliability derived?
How reliable are these reliability measures?
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