Cannot Add WMS Layers with REST API

CharlesNorsworthy — Wed, 21 Aug 2019 15:39:49 GMT

I am using ESRI’s REST API to create a new Web Map with WMS layers. I am trying to run the POST request http://{{domain}}/portal/sharing/rest/content/users/{{username}}/addItem with the following in the body:

f: json

title: testMap

type: Web Map

token: {{token}}

text:

{

"operationalLayers": [

{

"id": "wms_3449",

"url": "http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi",

"visibility": true,

"visibleLayers": [

"nexrad-n0r"

"opacity": 1,

"title": "IEM WMS Service",

"layerType": "WMS",

"version": "1.3.0",

"mapUrl": "http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi",

"layers": [],

"spatialReferences": [

900913,

4326,

102100,

3857

"extent": [

[

-126,

[

-66,

]

"maxWidth": 2048,

"maxHeight": 2048

}

"baseMap": {

"baseMapLayers": [

{

"id": "defaultBasemap",

"layerType": "ArcGISTiledMapServiceLayer",

"url": "http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_Imagery_World_2D/MapServer",

"visibility": true,

"opacity": 1,

"title": "ESRI_Imagery_World_2D"

}

"title": "ESRI_Imagery_World_2D"

"spatialReference": {

"latestWkid": 4326

}

Note, the WMS layer is based on the ArcGIS example using a WMS layer as an operational layer here: https://developers.arcgis.com/web-map-specification/objects/wmsLayer/ . When I try to create this map, it initially says

{

"success": true,

"id": "<whatever the id is>",

"folder": null

}

However, whenever I try to view the map using Map Viewer, I get an error message saying “The map cannot be drawn completely because one or more layers are not supported. These layers will be omitted.” From Map Viewer, when I go to Add->Add Layer from Web->A WMS OGC Web Service and put in the url from the text above, namely http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi?REQUEST=GetCapabilities&SERVICE=WMS, I get the following error: The WMS service, http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi, cannot be added to the map. It is either not available or you have entered an invalid URL for the type of layer you want to reference.

When I try to add this url manually, Fiddler says I got a 403 error when ArcGIS was trying to use a proxy for this request: GET /portal/sharing/proxy?https://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi?SERVICE=WMS&REQUEST=GetCapabilities HTTP/1.1

Does anyone know what is causing these errors? I appreciate any feedback.

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Cannot Add WMS Layers with REST API