dhis2-devs team mailing list archive

[Knut Staring <knutst@xxxxxxxxx>]

Let me also attach geojson versions of overlay files that are needed for
official maps - namely disputed areas and disputed boundaries.

These files need some additional styling (beyond width and color) to render
as required by international organizations.

k

On Thu, Apr 8, 2010 at 2:16 PM, Knut Staring <knutst@xxxxxxxxx> wrote:

> It's very cool to see the progress Jan and Tri are doing on the GIS module,
> the exports to Excel is very nice, and so is the one to PDF which preserves
> the layers. Inspired by StatPlanet which I also think we should add as an
> output option for DHIS2),
> http://www.sacmeq.org/statplanet/StatPlanet.html, I am testing the GIS
> module with world maps.
>
> Unfortunately, when generating GeoJSON from shapefiles with many polygons
> the result easily becomes very big (http://mapshaper.com/test/demo.html can
> alleviate that), but here is a world geojson file that is only 150 kb:
>
> http://thematicmapping.org/data/json/internet_users_2005_choropleth_lowres.json
>
>
> (discovered at this helpful blog:
> http://blog.thematicmapping.org/2008/04/thematic-mapping-with-geojson.html
> )
>
> There is a job to be done to verify this file with the ones used by WHO -
> ISO country codes should be added, and the names of some countries need to
> be changed. Probably some boundaries are also wrong. I will look into these
> issues when/if people would like to use this module for more official maps,
> in which case we also need to extend the export with ability to add a logo
> and disclaimer and maybe a few simple layout choices.
>
> Some issues:
> - It is not allowed to use 0 for latitude or longitude, even though this is
> the default value. Any reason to not allow that?
> - For a world map one would want to select a zoom level less than 5 which
> is currently the limit.
> - When there is no data for a polygon, it should be rendered without fill
> color, just boundary.
> - The PDF export should include a legend (I think this was recently added
> in Mapfish)
> - When trying to export the whole world to an image, I get this message (it
> works if I zoom in to just a few countries):
>
> Problem accessing /dhis-web-mapping/exportExcel.action. Reason: Form too
> large470782>200000
>
> With this small file, things seem to work even in Internet Explorer, and
> not only IE8 but even the horrible old IE6 which won't die...(I see no point
> in going to IE5, but it would be good totest IE7 also, which I don't have
> available right now).
>
> So we are definitely on the right track. I would like to set this up as a
> demo with some global data, would be nice to be not have to require a login.
>
> Knut
>



-- 
Cheers,
Knut Staring

Attachment: maskline08.json
Description: application/json

Attachment: maskpoly08.json
Description: application/json