[ckan-dev] Spatial search for datasets with dataset collection

Mon Jul 22 16:20:45 UTC 2013

I am not convinced that API spatial queries work with CKAN v2.0 (API v3).  I would love to have someone demonstrate a working bbox query under API v3.

Here is a challenge to the list: Please provide a simple example that confirms that spatial queries work via APIv3 and shows the correct syntax for using a spatial query to select packages/datasets.  This example can be written against data.gov or any of the other public CKAN instances out there.

Here is a little more information on my similar issue:
I have a CKAN instance with the spatial extension installed.
We have some datasets the include the 'spatial' metadata element
Using the spatial extension gui, I can correctly find/select datasets based on their bbox
I haven't been able to produce an API request that selects the correct datasets.

I put a question out to this list last week and haven't received any responses.  In trying to come up with a proper API request, I looked at the tests in ckanext-spatial.  The tests are still written against version 2 of the API.  This didn't seem like a great sign to me...

Thanks,

David.

From: ckan-dev-bounces at lists.okfn.org [mailto:ckan-dev-bounces at lists.okfn.org] On Behalf Of Tracy Harton
Sent: Monday, July 22, 2013 12:32 AM
To: ckan-dev at lists.okfn.org
Subject: [ckan-dev] Spatial search for datasets with dataset collection

I'm trying to search for datasets from a dataset collection, given an area of interest.  This works interactively and the following returns 6 datasets as expected:

http://catalog.data.gov/dataset?q=&collection_package_id=b64c5a49-80bf-4fd2-ac7f-c2f7fe474ae6&ext_bbox=-121,45,-120,46

If I try to do an API call to retrieve the data as JSON, the following always returns 0 results, but no error, regardless of bbox:

http://catalog.data.gov/api/search/dataset?q=&collection_package_id=b64c5a49-80bf-4fd2-ac7f-c2f7fe474ae6&ext_bbox=-121,45,-120,46

Leaving off the bbox returns the entire collection as expected:

http://catalog.data.gov/api/search/dataset?q=&collection_package_id=b64c5a49-80bf-4fd2-ac7f-c2f7fe474ae6

For a package_search, which does work for ext_bbox, I am not able to filter by collection_package_id, only "q"

So, is ext_bbox supported for this API search?  Or is this a data.gov<http://data.gov> issue?   Any help would be appreciated...

/tracy

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