Difference between revisions of "Simple R example"
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= Simple R example = | = Simple R example = | ||
| − | == Processing | + | == Processing rationale == |
The process takes one OGC WFS getFeature request passed as reference and use R to generate a plot as shown below: | The process takes one OGC WFS getFeature request passed as reference and use R to generate a plot as shown below: | ||
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The WPS process uses WPS-hadoop in pseudo-cluster mode. It fruits the hadoop streaming approach where the WFS URLs are pipped into a bash script that: | The WPS process uses WPS-hadoop in pseudo-cluster mode. It fruits the hadoop streaming approach where the WFS URLs are pipped into a bash script that: | ||
| − | + | ||
| − | + | * retrieves the WFS response via a curl GET request and stores the output (GML file). | |
| − | + | * This GML file is passed as argument to the R executable script (provided by IRD). | |
| + | * The output is published on the HDFS storage and returned to the client as an HTTP reference to the result | ||
=== Interface === | === Interface === | ||
Latest revision as of 11:20, 23 January 2013
Contents
Simple R example
Processing rationale
The process takes one OGC WFS getFeature request passed as reference and use R to generate a plot as shown below:
The OGC WFS server is hosted by IRD, the GetCapabilities URL is here: IRD GetCapabilities
Processing
Resources
The WPS process uses WPS-hadoop in pseudo-cluster mode. It fruits the hadoop streaming approach where the WFS URLs are pipped into a bash script that:
- retrieves the WFS response via a curl GET request and stores the output (GML file).
- This GML file is passed as argument to the R executable script (provided by IRD).
- The output is published on the HDFS storage and returned to the client as an HTTP reference to the result
Interface
The DescribeProcess URL is available here:
GET invocation
The GET invocation URL is:
POST invocation
The POST invocation is provided by:
