[Geowanking] a little coding help
asbury at cemar.org
Mon Jan 28 15:22:07 PST 2008
I've got a little mashup I've been working on in Google Earth/Maps and
I'm stuck. The GE and KML Developer support forums have come up dry so
I'm hoping someone here has an idea about how I can work it out.
I have created placemarks for several USGS stream gauges in my watershed
of interest and linked each placemark's balloon to the webpage of their
respective site. On said webpage are GIFs of graphs showing the stream's
discharge as recorded by the gauge. These GIFs are dynamically created
and update every 15 minutes. So now, everything looks great. Click on
the placemark icon, up pops the most recent graph - click on the graph
and you're redirected to the main page where you can get a lot more
The problem is that each GIF's URL is coded with the date, so every 24
hours the links to the graphs break. Actually there are two dates in the
URL one for the day that the data on the chart begins and a second for
when it ends. Like so - <YYYYMMDD..YYYYMMDD>. You can customize the
graph from the website to display anywhere from 1 to 31 days of data.
The default is 7 days and that's what I'd like to show.
So what I need is a bit of script that can either increment the date
(and subtract 7 to get the first date) and insert it into a URL, or grab
the date from somewhere, format it as YYYMMDD, subtract 7 and create a
I'm guessing scripts won't work within the GE placemark description
boxes themselves (though I don't know), so I may need to setup a static
link in the placemark to a page where I've created this dynamic image.
Center for Ecosystem Management and Restoration
4179 Piedmont Ave. Ste. 325
Oakland, CA 94611
Voice: 510-420-4565 x2
email: asbury at cemar.org
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