[Talk-us] Slippymap for USGS topos?

[Eric Wolf]

The USTopo products are not the "good old" 1:24K. Rather, they are GeoPDFs
generated out of The National Map layers (with one exception).

You can get the classic scanned topos (Digital Raster Graphics, DRGs) via
WMS:

[drg]

type=WMS
url=http://raster.nationalmap.gov/ArcGIS/services/DRG/TNM_Digital_Raster_Graphics/MapServer/WMSServer
layers=0,1,2,3,4,5,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23
levels=24
bbox=-180,90,180,-90
srs=EPSG:102113
spherical_mercator=true
tms_type=google

The orthoimagery layer is available via this WMS (note: this is NAIP plus
some higher resolution imagery):

[naip]
type=WMS url=
http://isse.cr.usgs.gov/ArcGIS/services/Combined/SDDS_Imagery/MapServer/WMSServerlayers=0
levels=24 bbox=-180,90,180,-90 srs=EPSG:102113
spherical_mercator=true tms_type=google

The National Map is available via this WMS (Zoom levels 13+):

[tnm] type=WMS #url=http://tnmdev.cr.usgs.gov/arcgis/services/TNM_Vector_Large/MapServer/WMSServer
url=http://services.nationalmap.gov/arcgis/services/TNM_Vector_Large/MapServer/WMSServer
layers=4,5,6,8,9,10,11,12,13,14,15,18,19,20,21,22,23,24,26,27,28,29,32,33,34,35,36,38,39,40,41,42,43,44,45,47,48,49,50,51,53,54,56,57,58,59
levels=24 bbox=-180,90,180,-90 srs=EPSG:102113 spherical_mercator=true
tms_type=google

You can also grab small scale National Map tiles directly (zoom 1-12):

http://basemap.nationalmap.gov/ArcGIS/rest/services/TNM_Vector_Small/MapServer/tile/$z/$y/$x

The WMS links are formatted for tilecache. I'm not sure what format JOSM
prefers, but you can probably infer it. Note that you need to get the layer
names (numbers) just right or you won't get a valid response from the
server. And don't try to use EPSG:900913 even though the GetCapabilities
says it works.

One final thing: Do not trace roads from The National Map! Despite the
normal license free status of USGS data, the roads in The National Map are
currently licensed from TeleAtlas.

-Eric Wolf

-=--=---=----=----=---=--=-=--=---=----=---=--=-=-
Eric B. Wolf                           720-334-7734





On Wed, Sep 7, 2011 at 12:26 AM, Bryce Nesbitt <bryce2 at obviously.com> wrote:

> Good old usgs topographic maps are copyright free:
> http://nationalmap.gov/ustopo/**faq.html<http://nationalmap.gov/ustopo/faq.html>
>
> And often a very useful reference when mapping, particularly in remote
> areas.
> I am aware of:
> http://toposm.com/us/
>
> But is there a way to get USGS topographic slippymaps as a background in
> JSOM?
>
> ______________________________**_________________
> Talk-us mailing list
> Talk-us at openstreetmap.org
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>
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