Thanks a bunch Chad
I see I have my work cut out for me and I appreciate your detailed reply
All the best
Victor
On 9.12.2010 08:35, Chad Killingsworth wrote:
This is a good question and beneficial to others, so I'm adding it as
a topic to the Maps API v3 group.
In your case, the situation is that as a user changes selections via
custom map controls, the map data needs to be refreshed using content
hosted in a SQL database. The problem is that the database is not
directly accessible to the user, but is accessible by using your web
server as a proxy. There are a lot of different ways to tackle this
problem. I'm going to outline two of the more common solutions:
1. Different selections simply toggle one or more map overlays.
This is the solution used on my map at
http://search.missouristate.edu/map/
The custom map controls on the right simply toggle different KML
Layers. Each KML file is actually generated dynamically from
content hosted in a database. So for instance the page at
http://search.missouristate.edu/map/kml/?layers=base simply
queries the database for building outline and description
information and outputs valid KML. On the map, the user checkbox
simply calls KmlLayer.setMap to toggle the visibility of the layer.
2. Use custom written AJAX to return new map data as the user
changes selections
In this scenario, in response to user interaction you would make
a javascript XMLHttpRequest call with the user selection
parameters to a special PHP page on your server. This PHP page
would query the database and output a JSON object with the data.
In your map javascript, you would use the returned JSON object
to make changes to your map. You would have to decide whether to
somehow detect changed options and modify features currently on
the map or whether to simply remove everything currently shown
and then add all the data back. This solution is more
technically involved than the Kml solution, but it gives you
more direct control over the behaviors of the objects on your
map. If you have never coded a solution like this, then I
recommend that you use a framework like jQuery to alleviate many
of the cross-browser details for you.
Good luck.
Chad Killingsworth
Assistant Director of Web & New Media
Missouri State University
-----Original Message-----
From: Victor Blaer [mailto:victor.bl...@gmail.com]
Sent: Wednesday, December 08, 2010 5:11 PM
To: Killingsworth, Chad A
Subject: Re: Awesome job on the map
Hi Mr Killingsworth (awesome name btw)
I'm attaching the two files.One is just the standard connection.php file.
The other is a map, that queries my database, but I have to hardcode
the criteria.I'd like to query the database and plot the map based off
the user input taken from checkboxes.I've searched and searched the
interweb but can't get anything working.
The template I'm working off is from
http://tips4php.net/2010/10/use-php-mysql-and-google-map-api-v3-for-displaying-data-on-map/
(live example http://tips4php.net/docs/google_maps_poi_php_mysql.php)
The query statement is on line 74 and the forms on 107.
ANY HELP appreciated and I promise to pay it back to the web!
Thanks for getting back to me, appreciate it Victor
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