[686] | 1 | .. _ogr_base_vect_ops: |
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| 2 | |
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| 3 | ********************************************************* |
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| 4 | Presenting building blocks - Using OGR based Web Services |
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| 5 | ********************************************************* |
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| 6 | |
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| 7 | .. contents:: Table of Contents |
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| 8 | :depth: 5 |
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| 9 | :backlinks: top |
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| 10 | |
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| 11 | Introduction |
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| 12 | ============ |
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| 13 | |
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| 14 | In this section, you will use basic ZOO-Services : ``BufferPy``, |
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| 15 | ``IntersectionPy`` and ``DifferencePy`` which use OGR Python module. |
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| 16 | The intended goal of this section is to present and interact with your new building blocks before chaining them in the next section. |
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| 17 | |
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| 18 | First of all, you should use the following link to access a user interface to interact with your service : |
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| 19 | `http://localhost/zoows-demo/spatialtools-py.html <http://localhost/zoows-demo/spatialtools-py.html>`__ |
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| 20 | |
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| 21 | Services Provider and configuration files |
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| 22 | ========================================= |
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| 23 | |
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| 24 | First you may verify if the ZOO-Services are available from your current setup. |
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| 25 | You can take a look at the ``Buffer.zcfg``, ``Intersection.zcfg`` and |
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| 26 | ``DifferencePy.zcfg`` to get details about parameters. |
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| 27 | As you can see from the ZCFG files, you will use ZOO-Services provided by the |
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| 28 | ``foss4g_ws`` Python service provider. So if you want to modify the Python code |
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| 29 | you will have to edit this file. |
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| 30 | You are invited to use similar requests as you seen in previous sections to learn about each service. |
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| 31 | |
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| 32 | The Buffer Service |
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| 33 | ========================= |
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| 34 | |
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| 35 | First click on a street then once the street is displayed in blue, click the |
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| 36 | 'Buffer' button on top, you should get similar result as displayed in the following. |
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| 37 | |
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| 38 | .. image:: ./images/Buffer_Level_15.png |
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| 39 | :width: 650px |
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| 40 | :align: center |
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| 41 | |
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| 42 | Since version ZOO-Project 1.2.0, you can run automatically some basic tests to |
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| 43 | make sure that you wrote a correct ZCFG file and your service is validating. |
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| 44 | |
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| 45 | .. note:: the current testing is really simple and should be adapted to each Services |
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| 46 | Provider, mainly to define input names. |
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| 47 | |
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| 48 | You can use the following command: |
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| 49 | |
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| 50 | .. code-block:: bash |
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| 51 | |
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| 52 | cd /home/user/zoo/testing |
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| 53 | ./run.sh http://localhost/cgi-bin/zoo_loader.cgi Buffer |
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| 54 | |
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| 55 | |
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| 56 | .. note:: During or after the test run, you can take a look inside the ``tmp`` directory |
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| 57 | which contains both the XML requests send to the ZOO Kernel (``*1.xml``) and the |
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| 58 | responses it gave (``output*.xml``). |
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| 59 | |
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| 60 | The Intersection Service |
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| 61 | ========================= |
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| 62 | |
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| 63 | Using the same client interface as before, once you get a Buffer, you can then |
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| 64 | select a street intersecting the Buffer geometry to compute intersection by clicking on the Intersection button. |
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| 65 | |
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| 66 | |
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| 67 | .. image:: ./images/Intersection_Level_15.png |
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| 68 | :width: 650px |
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| 69 | :align: center |
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| 70 | |
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| 71 | |
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| 72 | The Difference Service |
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| 73 | ========================= |
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| 74 | |
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| 75 | Using the same instructions as for Intersetion, you can get the following result. |
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| 76 | |
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| 77 | .. image:: ./images/Difference_Level_15.png |
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| 78 | :width: 650px |
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| 79 | :align: center |
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| 80 | |
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| 81 | |
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| 82 | Conclusion |
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| 83 | ======== |
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| 84 | |
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| 85 | Now you know this three services, and you get a simple interface to interact |
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| 86 | with your MapServer WFS and your ZOO-Project WPS Servers, you are ready to use |
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| 87 | the Services in a different way by chaining them using the ZOO-API to build |
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| 88 | more complexe and powerfull services. |
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