Hi,
Does anyone know how long it takes to get the emails for the NHD Subbasins? There was a message after each of my requests telling me I would receive a notice by email as to where I could download the files, but after 9 hours I still haven't received any. I don't know if I should continue waiting or request them again.
Thanks, Ray
Depends on how many request they have and what else the system is doing. I have got them in less than an hours to a few days. Sometimes they get lost in the system and they may come a few weeks later - long after I have received my rerequest.
They're finally coming through now, starting 12 hours after my request.
I notice that there are 7-10 files in each email, each with the same ftp...zip, but with different shapefile numbers (example below).
HydrographySubBasin / 15020002Shapefile 8.3ftp://nhdftp.usgs.gov/NHD181416.zip
HydrographySubBasin / 15020010Shapefile 8.3ftp://nhdftp.usgs.gov/NHD181416.zip
Should I just download the last zip in the list and use it, or how should I handle them?
Thanks again, Ray
You need them all. The 15020002 etc. numbers are the code for the region, subregion, basin, subbasin.
Thanks. I'll have to rename the files then since the same .zip forces them to write over the preceding files.
Sometimes the site goes down and they don't know. So if you don't get it in a day or so, email them.
Also, you only need to download the file once. They are all the same file. It did not used to be like that. But a few months ago they changed. I do not know what they have many links to the exact some file, but they do.
I have gone 48hrs then I get a huge chunk. It seems best to me to request on Friday and get them all over the weekend.
So what you're saying, if I understand you correctly, is that even if there are 6 shapefiles listed separately in the same .zip file, I can open just one .zip file and get them all?
Based on one of the emails, I opened each of the 6 files in this example in a separate folder and then processed them, since opening them in the same folder would have forced them to overwrite each other.
I did just check with my latest set of new NHD data (florida); you only need to download one zip from the email; they all contain the same thing.
Thanks for the information.
Ray