[Talk-GB] Highlighting an area ...

[Lester Caine]

Tom Chance wrote:
>     I'm in the middle of a web site overhaul for a town council, and I'd like to
>     improve the site by using OSM maps for each of the wards. The problem is how
>     to highlight the relevant area?
>
>
> One simple solution I have used:
>
> * get the OS open data boundary line dataset
> * use QGIS to clip the shapefile to just have the boundaries for wards in the
> town council's bounds
> * save that as geojson from QGIS
> * or as that previous step sometimes fails save as GPX, open in JOSM and save as
> geojson (!)
> * reference that in your leaflet or openlayers script, and use the attributes
> and styling to only show the selected ward, or show it differently, etc.
>
> In some map tools I've created for a local political party branch using
> leaflet-js, this results in nice polygons on a slippy map with the MapBox
> streets tiles. Very clean, attractive, quick and easy to use. Also for this site
> - www.londonrents.org.uk <http://www.londonrents.org.uk>
>
> You can also use QGIS to simplify the polygons if you're not bothered about
> precision. I've done this for the rents map above, which resulted in a much
> smaller chunk of geojson, which hugely improves loading times.

That is on the line of where I am heading :)
Of cause being able to click on a 'ward' and show the councillors will have to 
come later ...
Currently the site just has a list of streets for each, so it will be nice to 
know if they are ALL on OSM ...

-- 
Lester Caine - G8HFL
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