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General Category => Map Making Support => Topic started by: NeuroDoc on June 15, 2010, 08:38:17 PM

Title: High Res Water Data from new "National Map Viewer"?
Post by: NeuroDoc on June 15, 2010, 08:38:17 PM
Does anyone know the proper procedure to ensure high-resolution water data is downloaded from the new National Map Viewer (http://viewer.nationalmap.gov/viewer/)?

I can't seem to make the old NHD server work for me. But the new National Map Viewer allows one to download Hydrography data, I just don't know how this data compares to the area, flowline, and waterbody data one gets by following the map-making tutorial.

Thanks in advance.
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: Seldom on June 16, 2010, 02:16:15 AM
I read they were shutting all the old servers down.  I suspect it's the same data, just need to learn the new interface and be patient.  

I just downloaded a sub-basin.  It matches some High res data I downloaded from the old site.  Is there a way to tell from the numbering system?
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: NeuroDoc on June 16, 2010, 05:37:54 AM
That's my understanding as well. All GIS data will soon be available only from the National Map. I've requested two sub-basins and am waiting for notification to download them.

Personally, I find the new system easier to navigate and download data compared to the old seamless server for NED and the NHD server for water data. The only thing that might be an issue is there's a 1.5G limit on data that can be downloaded, but when you put data requests in your cart there's no indication as to what size that data will be.
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: Seldom on June 16, 2010, 09:18:32 AM
The old NHD site gave you options for "Hi Res" and "Local Res" data.  I downloaded a Hi Res shapefile, but I didn't see any options for other resolutions.
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: NeuroDoc on June 16, 2010, 09:25:35 AM
The old NHD site gave you options for "Hi Res" and "Local Res" data.  I downloaded a Hi Res shapefile, but I didn't see any options for other resolutions.

Was this labelled "Hi Res" somewhere, or did you just download the shapefile?
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: -Oz- on June 28, 2010, 07:30:47 PM
guess I need to download the update.  I think I used the new version to download my Florida data.
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: NeuroDoc on June 28, 2010, 07:50:17 PM
So I requested the NHD data for each sub-basin, and it appears to be hi-res data by default.

I also had the opportunity to have an e-mail conversation with one of the guys at the USGS (because my initial request for NHD data generated an error) and asked him why the pre-staged data wasn't available in the personal geodatabase format, and only in the proprietary ESRI geodatabase. He told me he'd investigate and get back to me. Here's hoping for an answer soon.
Title: Re: High Res Water Data from new "National Map Viewer"?
Post by: -Oz- on July 17, 2010, 12:20:12 PM
That would be awesome to have it pre-staged