Several weeks ago, some friends and I went riding in Healdsburg, CA and the surrounding area up in Sonoma County. As always, I collected GPS tracklogs.

This morning, I finally got around to uploading the tracklog, and before I even started using the tracklog, I noticed that appeared that nobody had even begun to clean up the TIGER import at all in downtown Healdsburg, so I have mostly been cleaning up the streets against the Yahoo aerial maps.

Someone will really need to go collect some data on the ground in Healdsburg, because there are quite a few places in the Tiger data that just don't make sense based on the aerial photography: streets that don't seem to exist, streets that don't connect but appear that they should, streets that do connect but appear that they shouldn't, and so on.

I did the best I could, with what I could be reasonably sure of based on the aerial photography. Unfortunately, my GPS tracklogs were primarily in the rural areas surrounding Healdsburg, so they weren't particularly useful for cleaning up downtown Healdsburg.