[Geomoose-users] Download link per layer.

[Brent Fraser]

Jim,

   Right now it is just an experiment to see how to integrate maps and 
charts.

The Back story: We've got a "deregulated" electricity market here in 
Alberta so there is a gov't agency that reports on supply on a 
minute-by-minute  basis 
(http://ets.aeso.ca/ets_web/ip/Market/Reports/CSDReportServlet). but 
their web page is just a set of tables.   I thought the data would look 
better as dynamic charts.  The spatial component is minor (just the 
locations of the generating stations and cross-border interconnects).

My first step is write some server-side stuff to scrape and store the 
info in a database, then I'll work on the display...

Best Regards,
Brent Fraser

On 4/26/2016 10:53 AM, James Klassen wrote:
>
> Bob,
>
> In general this is a very hard problem (impossible) to solve on the 
> GeoMoose side.  This is really a question of data organization.
>
> In general, there is a one to many relationship between a GeoMoose 
> catalog layer and GeoMoose MapSources (a WMS/WFS/other thing 
> OpenLayers can read service).
>
> There is also a one to (zero or many) relationship between a WMS layer 
> and data files/tables.  It could be an inline feature, could be a 
> group name that pulls in many (MapServer) layers, it could be data 
> generated on the fly (DB View or MapServer GeoProcessing).
>
> If assumptions can be made about how the data is organized on the 
> server or organized via WMS/WFS layer pairs via MapServer or the 
> source data is otherwise documented then you could have a service 
> (possibly WFS) generate a file and send it to the client to download/save.
>
> Brent,
>
> Assuming you are looking to solve this for a particular dataset and 
> not every possible GeoMoose datasource, I'd look at building a URL 
> that returns the data as (Geo)JSON (either via a MapServer 
> query/template, WFS outputformat, or custom script) and feeding that 
> to D3.js to make the chart.
>
> On Apr 26, 2016 11:27 AM, "Brent Fraser" <bfraser at geoanalytic.com 
> <mailto:bfraser at geoanalytic.com>> wrote:
>
>     bobb,
>
>       I was just looking into a similar problem.  But the target would
>     be a chart (e.g. bar/pie chart) in a browser window.
>
>     Best Regards,
>     Brent Fraser
>
>     On 4/26/2016 9:48 AM, Basques, Bob (CI-StPaul) wrote:
>>     All,
>>
>>     This is an on again, off again wishlist item for me.
>>
>>     Came up again this week here in the office.  I was wondering
>>     about adding a tool config to the mapbook for setting up a
>>     download link for data on a particular layer.  I understand that
>>     not all data sources are the same, and that some might be easier
>>     to setup than others, but in general, anyone else interested in
>>     this type of capability?
>>
>>     I initially thought about trying this with SHP files, of which we
>>     have about 260 different ones in our install.  Note: some layers
>>     are composed of more than one SHP file.  While thinking on it
>>     some more, another thought was to investigate whether some sort
>>     of standard output might be washed through Mapserver as a generic
>>     method of data output.  This would allow for a clip and ship
>>     approach too vs downloading an entire dataset, it also seems like
>>     it would help with data originating in Databases.  Maybe this is
>>     two different tools, or at least download options.  Some of the
>>     layers could easily be downloaded in their entirety.  Would
>>     GeoPackage be a possible output format to target for something
>>     like this, something else?  I’m also interested in any thoughts
>>     on how to manage/organize things on the backend.  I suspect that
>>     we have a good system already, but all ideas welcome.
>>
>>     Thanks
>>
>>
>>     bobb
>>
>>
>>
>>
>>     “There is nothing quite so useless as doing with great efficiency
>>     something that should not be done at all.”
>>                             - Peter Drucker
>>
>>
>>
>>
>>
>>
>>
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>
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