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Caching WMS Requests Using PHP and the PEAR Cache_Lite Package

Here’s the (censored) source code I use to cache WMS requests. It’s pretty straight forward as long as you have the PEAR Cache_Lite package. Feel free to use the source code however you want. I’d appreciate a link back to my site, but I don’t require it.

WMS Cache Source Code

A few things to note:

  • lifeTime is measured in seconds.
  • min/max X/Y are specific to the images I serve. The ones there are for Ann Arbor, MI.
  • transparent.png is just a 2×2 png image which is transparent. This shows up for requests outside the box that my WMS serves.
  • You will probably have to change the url with localhost in it to be whatever WMS server your images are coming from.

This entry was posted on Friday, August 19th, 2005 at 12:38 pm and is filed under Computer Science, Google Maps. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “Caching WMS Requests Using PHP and the PEAR Cache_Lite Package”

  1. mijael Says:
    October 23rd, 2005 at 12:59 am

    Hi Kyle. Great gob with Caching WMS Requests.

    I have been looking at kamaps caching script.

    Your work is very good and it does what it has to do.

    I would like to make you a suggestion to improve the integration of WMS and tiles. Like kamaps does in tiles.php.

    kamaps querys a big image and then cuts it into small tile’s size ones. This is necesary in many cases where the server renderes label acording to the size of the image.

    I haven’t tryed it out yet but I just wanted comment this .

    Thanks for all.

  2. Kyle Mulka Says:
    October 23rd, 2005 at 1:49 am

    Indeed it is a good suggestion. However, I haven’t had a problem at all with requesting small tiles. Maybe that is because I don’t have any labels like you mention.

  3. gmap newbie Says:
    November 7th, 2007 at 10:36 pm

    Hi Kyle, I have tried to study how to use Cache_Lite to cache the wms tiles to be overlayed on top of Google Maps, but I still couldn’t figure out how to make it work.

    Can you share more details about this?

    Thanks.

    Regards,
    gmap newbie

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