(I thought that I would split my answers on EPA and NHD). I know that there is already a coordinated effort on importing NHD. Please don't upload NHD data for an area that you are not familiar with. I am familiar with the NHD data in our area and I can tell you that it is still receiving a large number of edits at the state-level and that these improvements have not been submitted to EPA/USGS yet. It just takes time to edit, review, and push up to the feds.
NHD also comes in two resolution (1:100k and 1:24K). I am not sure what data most people are uploading. The 24K data is receiving the most edits at this time. This is another data set that will be evolving over time and for it to be of value, there will need to be a way to replace line segments in some sort of automated way. It the import is a one-shot deal, please don't import the NHD for my area yet. David. On Sat, Dec 12, 2009 at 10:25 AM, Ian Dees <ian.d...@gmail.com> wrote: > On Sat, Dec 12, 2009 at 9:29 AM, jamesmikedup...@googlemail.com > <jamesmikedup...@googlemail.com> wrote: >> >> On Sat, Dec 12, 2009 at 4:22 PM, jamesmikedup...@googlemail.com >> <jamesmikedup...@googlemail.com> wrote: >> > On Sat, Dec 12, 2009 at 4:17 PM, Ian Dees <ian.d...@gmail.com> wrote: >> >> >> The current NHD either includes these updates or is higher quality than >> >> this >> >> historical stuff that the USGS has. I would recommend working on >> >> importing >> >> the NHD rather than other datasets. >> > >> > Any links? I have not seen that yet. This is pretty detailed, the data >> > that I found. >> >> I found something, will process it next. >> http://www.horizon-systems.com/nhdplus/extensions.php?filter=11 > > Please don't use this! Just go to nhd.usgs.gov and grab the official data > set and use the existing process to upload NHD in your area: > > http://wiki.openstreetmap.org/wiki/NHD > >> >> I wonder if the older data has more types of data in it.... > > I looked at the data you previously pointed to and it looks to be old and of > low resolution. Also, it is comprised of landuse polygons which tend to be > lower resolution and a general approximation of what's on the ground rather > than a specific data set like NHD. > > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-us > > _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
