Looking for working contour Layer as a WMS or WFS

Question

I have had good success in the past with the following Contour layers but as of late neither seem to work:

https://carto.nationalmap.gov/arcgis/services/contours/MapServer/WMSServer?

https://services.nationalmap.gov/arcgis/services/WFS/Contours/MapServer/WFSServer?

Where can I find a working layer or how can I make this work?

Here is the error I am getting.

Answer 1

The https://carto.nationalmap.gov/arcgis/services/contours/MapServer/WMSServer? service is working but is scale layered, you'll need to zoom in to see the contours.

A working GetMap request for the service (as generated by QGIS) is:

https://carto.nationalmap.gov/arcgis/services/contours/MapServer/WmsServer?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=43.62374229720873586,-102.0058404622368329,43.65933876928008317,-101.9465130087845779&CRS=EPSG:4326&WIDTH=920&HEIGHT=552&LAYERS=11&STYLES=&FORMAT=image/png&TRANSPARENT=TRUE

The services.nationalmap.gov WFS is also working, but if you are zoomed out too far your request will be for a lot of data. QGIS will give the error, as you report, if the service takes too long to complete the response, but you MAY still retrieve all the data requested.

Example WFS GetFeature request as generated by QGIS is:

https://services.nationalmap.gov/arcgis/services/WFS/Contours/MapServer/WFSServer?SERVICE=WFS&REQUEST=GetFeature&VERSION=2.0.0&TYPENAMES=WFS_Contours:Contours_Lines_-_Large_Scale&STARTINDEX=0&COUNT=1000&SRSNAME=urn:ogc:def:crs:EPSG::3857&BBOX=-11355238.21819610521197319,5401926.45064298808574677,-11348633.91628776118159294,5407398.87103497702628374,urn:ogc:def:crs:EPSG::3857