ARCGIS Rest API with python addfeatures question

Larry

I am uploading some Points and Lines into ArcGIS Online hosted feature services using a python program the ArcGIS Rest Api. The points work fine but I am having trouble getting the correct format for adding the lines.

For the Points:

{
    "features":

            "geometry": {

                  "x": x,
                  "y": y
             },
            "attributes": {
                "RECORD_ID": RECORD_ID,
                "DEVICE_ID": DEVICE_ID,
                "DATE_TIME": DATE_TIME,
                "LONGITUDE": LONGITUDE,
                "LATITUDE": LATITUDE,
            }

 }

Works.

For the lines If have tried:

{
     "features":
            "paths":[
                [x,y],[x1,y1]],
                "spatialReference": {"wkid" : 4326},
                
            "attributes": {
                "RECORD_ID": RECORD_ID,
                "DEVICE_ID": DEVICE_ID,
                "DEVICE_NAME": DEVICE_NAME,
                "DATE_TIME": DATE_TIME,
                "SPEED": SPEED,
                "HEADING": HEADING,
            }
 }

FAILS.

The error I get is:

"No JSON object could be decoded"

Any idea what I am doing wrong?

Thanks

Larry

RandyBurton

I believe for the add query or update (OBJECTID field required) query, the features section is all that is needed.  You shouldn't need "fields" or the other sections.

{
	"features": [{
		"attributes": {
			"RECORD_ID": 1,
			"DATE_TIME": 1546359300000,
			"SPEED": 1,
			"HEADING": 12
		},
		"geometry": {
			"paths": [
				[
					[-5871083.00245447, 6028331.87508284],
					[-5871713.60793782, 6027605.72331413]
				]
			]
		}
	}]
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

I did notice that the spatial reference of the line layer returned is 3857 - web mercator (see below).  From your first json example, it looks like you are trying to use 4326 - lon/lat.  You may need to convert your coordinates before the update query with a projectAs.

"spatialReference": {
    "wkid": 102100,
    "latestWkid": 3857
}‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>