[ckan-dev] GIS dataset import

Thu Jan 16 11:00:37 UTC 2014

Philippe,

This is spectacular! A previewer for geo-data in nearly any format!

A glance at the code suggests you've done an extensive job on this,
with a proxy that chunks and OpenLayers 2 and 3 support. So once
you've ironed out the remaining issues, I'm sure everyone will be
pleased to benefit from it and encourage more geo-data publishing.

One idea that I'm keen on is creating thumbnail images of these
previews, that could be shown on the resource or even dataset page. I
think this would entice people to the previews. Is there some JS or
OpenLayers function that could create a mini screenshot to create the
thumbnail automatically that we might employ at some point?

David

On 14 January 2014 21:36, Philippe Duchesne <philippe at okfn.be> wrote:
> Hello David, Cliff,
>
> FYI, a fork of ckanext-spatial done for openbelgium.be has support for
> WFS,WMS,KML,GML,GeoJSON,ArcGIS and Google Fusion Tables.
>
> You can have a look at http://portal.openbelgium.be/dataset/geospatial-test
> for a demo.
>
> The code is still in beta stage, but available at
> https://github.com/pduchesne/ckanext-spatial/tree/OL3_VIEWER
>
> best,
>
> --p.
>
>
> On Tue, Jan 14, 2014 at 5:52 PM, David Read <david.read at hackneyworkshop.com>
> wrote:
>>
>> Cliff,
>>
>> CKAN's datastore can store GIS data files like any others. The service
>> you then want to provide is the ability to preview them.
>>
>> data.gov has a previewer that I think should cover KML, and I don't
>> think it would be too hard to develop it to show GeoJSON and
>> Shapefiles too (since I believe OpenLayers supports these). Perhaps
>> OKF people can find a dataset as an example, because I couldn't find a
>> KML file with a quick look.
>>
>> The other way geodata is often provided is via a WMS or WFS server
>> (rather than as a downloadable file). CKAN is not ideal for serving
>> this data. But data.gov.uk has developed a WMS viewer for CKAN and it
>> is easily extended to WFS. I believe OKF has recently done a similar
>> tool.
>>
>> David
>>
>> On 13 January 2014 18:22, Cliff Ingham <inghamn at bloomington.in.gov> wrote:
>> > We're looking at publishing all of the GIS data for our city.  Am I
>> > correct in thinking that CKAN is built for this, or is CKAN only for the
>> > metadata about our GIS data?
>> >
>> > Importing GIS data files as datasets has not been going very well.  I'm
>> > thinking we're doing it wrong.
>> >
>> > --
>> > Cliff Ingham
>> > http://www.ohloh.net/accounts/inghamn
>> > -------------------------------------
>> > "If debugging is the process of removing software bugs, then programming
>> > must be the process of putting them in."
>> > -- Edsger Dijkstra
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