dhis2-devs team mailing list archive

[Jason Pickering <jason.p.pickering@xxxxxxxxx>]

Hi Morten,

I am not sure what we support, but there are three feature types as far as
I know: Points ,Polygons and MultiPolygons. If we only support MultiPolys,
that would imply that all Polys would need to be converted prior to import
into DHIS2, which is fine, but based on my mail previously, it seems that
it must be exactly the opposite, namely converting Multi-Polys to Polys.

I was able to render a file with both MultiPolys as well as Polygons in
this client without issues, which had been exported from a shape file to
GeoJSON using ogr2ogr.

Jan, could you offer any insight into how to handle Polygons and
Multi-polygons?

Regards,
Jason


On Fri, Jan 8, 2016 at 6:41 AM, Morten Olav Hansen <mortenoh@xxxxxxxxx>
wrote:

> Hi Jason
>
> Do we actually support anything other than MultiPolygons and Points? For
> my GeoJson exporter, I default to MultiPolygon unless its a Point.
>
> I have been able to successfully render all geojson using
> http://geojson.io
>
> What is supported by GIS, I don't know, Jan would have to explain that.
>
> --
> Morten
>
> On Tue, Jan 5, 2016 at 7:16 PM, Jason Pickering <
> jason.p.pickering@xxxxxxxxx> wrote:
>
>>
>> Hi Devs,
>> I am attempting to directly update the coordinates using the WebAPI, but
>> am running into issues with the formatting (I think) of JSON fragments.
>>
>> The worflow is as follows.
>> 1) Use MapShaper to simplify the coordinates.
>> 2) Export as GeoJSON.
>> 3) Use curl to PUT the coordinates to the correct end point, e.g.
>> http://myserver/api/organisationUnits/abcd1234/coordinates
>> 4) Use curl to PUT the feature type (either "POLYGON" or "MULTI_POLYGON")
>> depending on what is reported by the GeoJSON.
>>
>> That part seems to work fine and I get something which looks like this.
>>
>>
>> Sample polygon..
>>
>> {
>>
>>    - featureType: "POLYGON",
>>    - coordinates: "[[[[125.8054,-8.7452],[125.8038,-8.7455],[125.8031,-8.7455],[125.8031,-8.7471],[125.8028,-8.748],[125.8021,-8.7488],[125.8013,-8.7492],[125.8004,-8.7494],
>>
>>
>> Sample MultiPolygon:
>>
>>
>> {
>>
>>    - featureType: "MULTI_POLYGON",
>>    - coordinates: "[[[[[127.3286,-8.448],[127.3281,-8.4479],[127.3272,-8.4476],[127.3271,-8.4473],[127.3267,-8.447],[127.3254,-8.4473],[127.3251,-8.4471],[127.3249,-8.4466],[127.3246,-8.4465]...
>>
>>
>>
>> In the GIS client, when loading any of the MultiPolygon's I get
>> Uncaught TypeError: Cannot read property 'length' of null with  util.map.getTransformedFeatureArray.
>>
>> If I mangle the GeoJSON such that is has four square brackets (instead of five as above) things works OK. If I change the number of square brackets of normal polygons to three (as in the spec example here <http://geojson.org/geojson-spec.html>) , I get the same error.
>>
>> Is there a particular reason for this? It would seem to be desirable to allow the upload of GeoJSON directly from a GIS system, without having to mangle it before.
>>
>> Regards,
>> Jason
>>
>>
>>
>>
>> --
>> Jason P. Pickering
>> email: jason.p.pickering@xxxxxxxxx
>> tel:+46764147049
>>
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>>
>


-- 
Jason P. Pickering
email: jason.p.pickering@xxxxxxxxx
tel:+46764147049