[Google Maps API v2] Re: Developing Gogle maps API to show UK political boundries and user specific location

On Nov 5, 1:30 pm, "j...@democratise.org"
<digitaldemocr...@hotmail.co.uk> wrote:
> I know this is possible and in th etutuorials just wondered if anybody
> had tried anything similar and how they got on or any possible probles
> in doing so, we already have all the policital boundries and can
> convert the data to any required values

The usual answer to this sort of polygon display is custom tiles. John
Coryat has demonstrated this: http://www.
usnaviguide.com/ws-2008-02/presentation.pdf Search Google for "coryat
youtube google custom maps" for the video.

If you are only interested in one constituency at a time, then
something like my parish map might be the answer where a server script
sends details of an encoded polygon for display. Polygons are not
recommended where large numbers are involved though.

See http://www.acleach.me.uk/acny/search.htm -- enter a location in
the box and then you can click the map or drag the location marker. An
ambiguous search like "Cowley UK" is also catered for. Clicking the
location marker gives a url which will recreate the displayed map. The
boundary data is held as an ordered set of coordinates and the server
calculates which parish contains the click/dropped marker, retrieves
its boundary points and calculates the encoding on-the-fly.
Performance is good, and a properly spatially-enabled database would
be even faster. Encoded polygons can cope with multi-area shapes,
which may not be a problem where constituency boundaries are
concerned. http://www.acleach.me.uk/acny/search.htm?=51.7494,-1.7724,13,51.7596,-1.7793

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