[mapserver-users] GeoJSON output from MapServer

[Steve Lime]

Two things:

1) TEMPLATE is a keyword and must be quoted at the moment, so use DRIVER 'TEMPLATE'

2) The file to be used in the OUTPUTFORMAT is given like this:

  FORMATOPTION 'FILE=/some/template/file/...'

3) You're call to MapServer needs to be a query. For example:

  http://localhost/cgi-bin/mapserv.exe?map=/ms4w/apps/pmapper/pmapper-3.2.0/config/default/geojson_demo.map&layer=countries&mode=nquery&qformat=geojson

This call will use all the default EXTENT value in the mapfile to query all eligible layers and run the
results through the geojson driver.

I'm doing this to produce javascript code that gets executed by an Ext.JS component. Not purely
GeoJSON but it works similarly.

Steve

>>> On 7/2/2009 at 4:15 PM, in message
<OFA82DFB5F.67E53647-ONC12575E7.0073E271-C12575E7.0074CA4C at pula.hr>,
<Dejan.Gambin at pula.hr> wrote:
> Steve,
> 
> Is there any GeoJSON example I can see? I must be missing something 
> trivial,
> 
> When I put:
> 
> OUTPUTFORMAT
>   NAME 'geojson'
>   DRIVER TEMPLATE
>   MIMETYPE 'application/json; subtype=geojson'
>   TEMPLATE 'myTemplate.js'
> END
> 
> in my.map file and call for example 
> "http://localhost/cgi-bin/mapserv.exe?map=/ms4w/apps/pmapper/pmapper-3.2.0/con 
> fig/default/geojson_demo.map&layer=countries" 
> (this works correctly without geojson part), I get: getString(): Symbol 
> definition error. Parsing error near (TEMPLATE):(line 74) 
> 
> If I put DRIVER 'TEMPLATE' then I get: loadOutputFormat(): Unknown 
> identifier. Parsing error near (TEMPLATE):(line 76) 
> 
> Finally, putting FORMATOPTION 'FILE=myTemplate.js' instead of TEMPLATE 
> gives me: loadOutputFormat(): General error message. OUTPUTFORMAT clause 
> references driver TEMPLATE, but this driver isn't configured. 
> 
> So, I am obviously doing something wrong regardless the myTemplate.js 
> file? (anyway, can you give me an example .js file, anything that could 
> help :-)
> 
> regards, dejan
> "Steve Lime" <Steve.Lime at dnr.state.mn.us> wrote on 02.07.2009 15:35:28:
> 
>> What does myTemplate.js look like?
>> 
>> >>> <Dejan.Gambin at pula.hr> 07/02/09 5:33 AM >>>
>> Thanks Fabio,
>> 
>> As I said in my last post, I can't get GeoJSON output using this 
>> outputformat:
>> 
>> OUTPUTFORMAT
>>   NAME 'geojson'
>>   DRIVER 'TEMPLATE'
>>   MIMETYPE 'application/json; subtype=geojson'
>>   FORMATOPTION 'FILE=myTemplate.js'
>> END
>> 
>> :-(
>> 
>> regards, dejan
>> 
>> Fabio D'Ovidio <fabiodovidio at gmail.com> wrote on 02.07.2009 09:28:06:
>> 
>> > Hi,
>> > 
>> > Dejan.Gambin at pula.hr ha scritto:
>> > >
>> > > Fabio,
>> > >
>> > > Glad to here you are here too :-)
>> > >
>> > > I can certainly use both GeoServer and MapServer but this is not 
>> > > something I would like at the end. Since I am still investigating 
> all 
>> > > this, I am not in such a hurry to get it working with my data ASAP. 
>> > > So, I would rather go with one of your Mapserver solutions.
>> > It is not so difficult...just 2, 3 minutes to load your layer in 
>> > GeoServer ;-)
>> > 
>> > >
>> > > My first question, to be sure - so MapOl reads/gets the GeoJSON data 
> 
>> > > from Geoserver WFS and outputs GeoJSON data to WebClient? If I 
>> > > understand Steve correctly, there is no way currently to get GeoJSON 
> 
>> > > output from MapServer WFS, only with CGI? So we come to your 
> solution 
>> 2.
>> > 
>> > If you want to use the second solution you must create the HTTP string 
> 
>> > to get GeoJSON from CGI-MapServer and than you must change MapOl 
> request 
>> 
>> > to receive data and read them.
>> > If you want send me the URL and I'll send you the new MapOl as soon as 
> 
>> > possbile!
>> > 
>> > 
>> > -- 
>> > Fabio D'Ovidio
>> > Geospatial solutions
>> > 
>> > Inova S.r.l.
>> > Web : http://www.inovaos.it 
>> > GeoBI Blog: www.geobi.org 
>> > Tel.: 081 197 57 600
>> > mail: fabiodovidio at gmail.com, f.dovidio at inovaos.it 
>> > skype: dovidio_fa
>> > 
>>