[okfn-help] [okfn-discuss] More on Google Maps

[Daniel Dietrich]

Hi Mauricio,

On 23.04.2011, at 22:58, Maurizio Napolitano wrote:

>>>> i checked the code and i can do this without big problems. I
>>>> substituted the gmaps code and i implemented everything with
>>>> openlayers using openstreetmap as background.
>>> 
>>> <http://de.straba.us/okfn-dashboard/>
>> 
>> Great! I am looking for something similar for
>> http://opengovernmentdata.org/data/map/
>> 
>> Is there a way we could easily create a map with with openlayers?
>> Right now the information is gathered in a google goc at
>> https://spreadsheets.google.com/ccc?key=0Ams8fpz2_77XdG8tZ2ZrUGoybnlpU0NGTjhiUEpQdVE&hl=en_GB&authkey=CLDY7sYM#gid=1
> 
> About yout problem:
> in the web page I see a KML file.
> (i do this test:
> http://maps.google.it/?q=http://opengovernmentdata.org/files/2011/03/ogdmap.kml
> 
> It's very easy show KML files in OpenLayers KML
> Look this examples
> http://openlayers.org/dev/examples/sundials.html
> http://openlayers.org/dev/examples/kml-layer.html


> 
> I hope to spend time in these days to write the code, but I am equally
> sure that you solve the problem before me
> (I hope you can understand my bad english)
> 
>> 3 questions:
>> 
>> 1. what is the easiest way to create a file (and what file format to
>> use?) from the google doc? and
> i think a good way is extract the file in csv format by using the
> tabulation like separator
> 
>> 2. how to feat it into an osm map like you did?
> 
> here is a example with a txt file
> http://openlayers.org/dev/examples/markersTextLayer.html
> and here the relative file displayed
> http://openlayers.org/dev/examples/textfile.txt
> 
> but use a wms source with a WGS84 projection
> the map service of osm use the "google mercator projection", so you need a little tip to transform the coordinates in this projection.
> 
> you can study the code in this example
> http://openlayers.org/dev/examples/sundials-spherical-mercator.html
> for a solution
> 
> If you're new to these concepts, it all seems difficult, but I can assure you it is not so
> 
>> I would really appreciate any help with this since I think it would
>> be great to use OSM instead of google maps.
>> 
>> All the best Daniel

Thank you very much for this hints. 

> 
> These days I'll write a code for you, but I'm sure you will do before me:)

I did study the links you provided with interest and yes: in the beginning it all looks a bit complicated, so I did not jet have progressed anyhow on this issue since.

Are you still up to help with this? Maybe we could also set up a brief skype call? Let me know what you think?


All the best
Daniel