[OWSLib-users] Help with wps.execute

[Alastair Graham]

Hello
I am trying to get a simple WPS call to work using the standard tools in
Geoserver (vec:Simplify using topp:states data) and owslib. I keep coming
up with the following error:

owslib.wps.WPSException : {'code': 'NoApplicableCode', 'locator': None,
'text': 'Failed to retrieve value for input
features\norg.geoserver.wps.ppio.WFSPPIO$WFS10 cannot be cast to
org.geoserver.wps.ppio.LiteralPPIO'}

I think I know what it means (a clash of formats?) but don't know how to
resolve it. All the WMS, WFS and WPS GetCapabilities and DescribeProcess
work fine, it's just the Execute component that is failing.

Geoserver: I am using the latest container from meteofi (
https://hub.docker.com/r/meteofi/geoserver)
Data: I am trying to get this running on the data supplied with Geoserver
(topp:states) before I try my own data.

Code:
from owslib.wps import WebProcessingService, monitorExecution,
printInputOutput

serverURL = 'http://localhost:8080/geoserver/wps'

wps = WebProcessingService(serverURL, verbose=False, skip_caps=True)
processid = 'vec:Simplify'
inputs = [('features','topp:states'),
            ('distance', '10'),
            ('preserveTopology', 'True')]

execution = wps.execute(processid, inputs)
if execution.isSucceded:
    output, = execution.processOutputs
    print(output.data)

I can get this to work using the Geoserver WPS request builder, and using
an XML file through Curl, so I guess the issue is with my Python.
Any pointers on what I need to do to handle this issue would be really
appreciated

Thanks
Alastair


| Alastair Graham

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