[gdal-dev] Using GDAL WMS with USGS 3DEPElevationIndex

[Carl Godkin]

Hi again,

In case anyone else is interested, I followed one of the links that Michael
provided and found that I should be able to use WCS directly:

gdalinfo "WCS:
https://elevation.nationalmap.gov:443/arcgis/services/3DEPElevation/ImageServer/WCSServer?version=2.0.1&coverage=DEP3Elevation
"

This returns one band of Float32 elevation data.  This is exactly what I
want! Thanks to both of you for the suggestions,

carl

On Thu, Jun 4, 2020 at 7:55 AM Carl Godkin <cgodkin at gmail.com> wrote:

> Hi Michael,
>
> That seems perfect.  I'll experiment with that.
>
> Thank you very much!
>
> carl
>
> On Thu, Jun 4, 2020 at 7:45 AM Michael Smith <michael.smith.erdc at gmail.com>
> wrote:
>
>> Looks like they don’t provide the data from that service just the
>> extents. To get the data, they have the product view
>> https://viewer.nationalmap.gov/basic/#productGroupSearch
>>
>> that links to files for download
>>
>>
>>
>> Or you can access them directly via gdal with something like
>>
>>
>>
>> gdalinfo /vsizip//vsicurl/
>> https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/1/GridFloat/USGS_NED_1_n35w117_GridFloat.zip/usgs_ned_1_n35w117_gridfloat.flt
>>
>>
>>
>> Mike
>>
>>
>>
>>
>>
>> --
>>
>> Michael Smith
>>
>> US Army Corps of Engineers
>>
>> Remote Sensing/GIS Center
>>
>>
>>
>>
>>
>> *From: *Carl Godkin <cgodkin at gmail.com>
>> *Date: *Thursday, June 4, 2020 at 10:28 AM
>> *To: *<michael.smith.erdc at gmail.com>
>> *Cc: *<gdal-dev at lists.osgeo.org>
>> *Subject: *Re: [gdal-dev] Using GDAL WMS with USGS 3DEPElevationIndex
>>
>>
>>
>> Hi Michael,
>>
>>
>>
>> Thanks a lot for your reply.
>>
>>
>>
>> I managed to come up with something sort of like that by using
>> gdal_translate to a WMS service description file and then using that.
>>
>>
>>
>> But I don't see how to get elevations from there.  Have you figured that
>> out?  I know how to get imagery, but I'm interested in elevation values.
>>
>>
>>
>> Thanks a lot,
>>
>> carl
>>
>>
>>
>>
>>
>> On Wed, Jun 3, 2020 at 5:42 PM <michael.smith.erdc at gmail.com> wrote:
>>
>> Carl,
>>
>>
>>
>> Try something like
>>
>>
>>
>> gdal_translate -f gtiff  "<GDAL_WMS><Service name=\"AGS\"><ServerUrl>
>> https://index.nationalmap.gov/arcgis/rest/services/3DEPElevationIndex/MapServer</ServerUrl><BBoxOrder>xyXY</BBoxOrder><SRS>3857</SRS></Service><DataWindow><UpperLeftX>-20037508.34</UpperLeftX><UpperLeftY>20037508.34</UpperLeftY><LowerRightX>20037508.34</LowerRightX><LowerRightY>-20037508.34</LowerRightY><SizeX>2500</SizeX><SizeY>2500</SizeY></DataWindow></GDAL_WMS>"
>> test1.tif -projwin  ulx uly lrx lry -projwin_srs <srs of your window>
>> -t_srs <srs you want for the output>
>>
>>
>>
>> If you want a different size than 2500x2500 just change that size
>>
>>
>>
>> Michael Smith
>>
>> US Army Corps
>>
>>
>>
>>
>>
>> On Jun 3, 2020, at 8:27 PM, Carl Godkin <cgodkin at gmail.com> wrote:
>>
>> 
>>
>> Hi,
>>
>>
>>
>> I'm unable to figure out how to retrieve elevation data (grids) from the
>> 3DEP program's endpoints.
>>
>>
>>
>> Starting here:
>> https://index.nationalmap.gov/arcgis/rest/services/3DEPElevationIndex/MapServer
>>
>>
>>
>>
>> it would seem to be possible but I just cannot get anything back other
>> than solid white images.   Most of the help from that page leads off to
>> ArcGIS-land which I don't have or want to use.  And Googling for 3DEP leads
>> only to more government sites that aren't helpful.
>>
>>
>>
>> If you have some experience with this (or a related public elevation data
>> source), would you please send an example "gdal_translate" command line?
>>
>>
>>
>> I'd really like to figure out how to download terrain (as perhaps a
>> GeoTIFF with floating point elevations) for an arbitrary CONUS lat/lon
>> range.
>>
>>
>>
>> Thanks in advance for any help!
>>
>>
>>
>> carl
>>
>> _______________________________________________
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>> gdal-dev at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>>
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