[Imports-us] [Talk-us] scanned USGS Topo Layer?

[Randal Hale]

It's more manual - 
http://store.usgs.gov/b2c_usgs/usgs/maplocator/%28xcm=r3standardpitrex_prd&layout=6_1_61_48&uiarea=2&ctype=areaDetails&carea=$ROOT%29/.do 


You can click and get a list of all available quads and then download 
the PDF. It's not great for easy metadata - but it works.

Rany

-----------------
Randal Hale, GISP
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjhale at northrivergeographic.com
<mailto:rjhale at northrivergeographic.com>
twitter:rjhale
http://about.me/rjhale

On 12/02/2013 10:01 AM, Richard Welty wrote:
> On 12/2/13 9:51 AM, Ian Dees wrote:
>> The "USGS Scanned Topos" layer is a cached layer based on the three 
>> layers here:
>>
>> http://raster.nationalmap.gov/ArcGIS/rest/services/DRG/TNM_Digital_Raster_Graphics/MapServer
>>
>> I don't see a good way to check metadata for the scanned quads. 
>> There's information about the "Large Scale Imagery" layer, but not 
>> the scanned topos.
>>
> it'd be good to try to figure a way out to do that, although
> i realize it may not be feasible. the problem is that when
> you're looking at a quad and you don't know the age of
> the data, it's hard to assess it's value vs other data you may
> have in front of you.
>
> i currently have the 2003 GPS traces the ATC supplies for the
> Appalachian Trail north of Salisbury, CT which differ from
> what the USGS quad layer shows. it is almost certainly the case
> that the USGS quad is out of date by decades and the ATC data
> represents the current trail routing, but i'd love to eliminate
> that 1% of doubt.
>
> i guess what it comes down to is that the USGS quads are good
> for topo data but otherwise they're basically historic documents.
>
> richard
>
>
>
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