Geographical data

[dan hilton]

Hi All

Just in case anyone needs this, all coordinates in the parks
webservice and some of the others, are using the geodatic system WGS84
— SRID 4326.

It's basically the same as the GPS system, so when you overlay it on
other services (gmaps, OSM, etc) you may need to do a remapping.

http://en.wikipedia.org/wiki/WGS84

Hope that helps,
Cheers,
Dan

[Dave Challender]

On 1 June 2010 14:09, dan hilton <daniel...@gmail.com> wrote:

Hi All

Just in case anyone needs this, all coordinates in the parks
webservice and some of the others, are using the geodatic system WGS84
— SRID 4326.

It's basically the same as the GPS system, so when you overlay it on
other services (gmaps, OSM, etc) you may need to do a remapping.

On the subject of mapping tools - i used the Yahoo mapping API (using library xml data) - and had interesting results due to the high number of digits in the coordinates
e.g.
 <coordinates>52.21433367801476,-1.8734559416770935</coordinates>

I found the large number of digits caused the Yahoo maps api to plot markers in the incorrect position (and these were off by a *long* way, kilometres not metres!)
I had to use some scripting to truncate the coordinates to a smaller number of decimal places to get data to plot correctly
Not sure if this will affect other mapping tools - but worth being aware of if your mapped locations look weird.

(I used Yahoo as their mapping api does not tie you to a specific url / domain, meaning it works from html files anywhere (e.g. on your "PC desktop") and so good as way of showing  sample code for people who do not have their own servers / domains)