A mapnik rendering change has revealed a problem in some areas with NHD imported waterways. An example of the problem is at http://www.openstreetmap.org/?lat=45.3&lon=-123.3&zoom=9&layers=M
Essentially, all the streams are tagged as waterway=river, with waterway=stream being used for what appear to be intermittent streams. I propose doing the following changes. These changes would *only* be done to ways that have not been modified since import. I have experience with this type change from cleanup on Canadian NHN data. 1. Adding intermittent=yes to NHD streams. 2. Downgrading waterway=river to waterway=stream for non-rivers. 3. Joining rivers into a single way Steps 1 and 2 would be done in one set of imports while joining rivers would be done in a second pass. Spot checks in the area linked indicate this would cause no problems. If verification with imagery was necessary I'd use MapQuest's Open Aerial Map as it seems to be the highest quality in these remote areas. _______________________________________________ Talk-us mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-us
