Suppose I have QGIS server up and running with some vector data. Now a user accesses this data from a webpage. Would it be possible in some ways for the user to send a request to the QGIS Server and make it do some Vector Geo-processing at the server side and return the results? (For example user sends a select query on a point layer. The Server will calculate the Convex Hull and return the WKT.)

As per the QGIS website,

QGIS Server provides a web map service (WMS) using the same libraries as the Quantum GIS (QGIS) desktop application.

If it is not possible at present, would it be possible to create something like a REST service(i got the term from ArcGIS REST API) which can hold communication between user and QGIS server? What are the difficulties in implementing them?


You have many options:

  1. run the operation directly in the browser with the ever-improving Javascript Topology Suite, which btw support the ConvexHull operation you cite

  2. other than using a WPS server you can also roll your own lightweight version which just runs on top of JTS, like this one I have coded some time ago.

  3. as in 2, but with different technology: if you're feeling adventurous and want to be cool you could also use nodejs (which for sure is more lightweight that the complete java stack required by my previous suggestion), as I hint in this gist

Note that item 3 is essentially the same as 1, only running server-side instead of running in the browser

|improve this answer|||||
  • i loved option 2! – vinayan Jul 10 '12 at 3:47

Seems like you are looking for a WPS Server. QGIS Server is a WMS&WFS Server but it does not handle WPS. If you're interested in adding WPS support to QGIS Server (programming yourself or supporting a programmer), contact the developer mailing list.

|improve this answer|||||

You are trying to use a snowplow to win a go-kart race. As underdark said, you are probably looking for a WPS server (several out there).

On the other hand, depending on your use case, you may be better of just writing a thin layer (say python/django) on top of postgis

|improve this answer|||||

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.