Alternate mapping imagery for DChart (esp. Great Lakes)


We are interested in using DChart/Dapper to serve our own data. However, looking at the web page at http://dapper.pmel.noaa.gov/dchart/ it appears that the mapping imagery does not even show our area of interest, the Great Lakes, nor does it allow zooming in to the resolution we need.

Is anyone investigating using map tiles from other sources (such as Google Maps) with DChart? Does DChart perhaps already have an API feature that allows specifying an alternate source of mapping imagery?

Thank you.

Hi Tom, There's no reason you


Hi Tom,

There's no reason you can't substitute your own map tiles for the map tiles included in DChart, even though there isn't an API to do this. It's just a matter of chopping up a map at each zoom level into 128x128 tiles and storing them in the appropriate directory. You might consider downloading the Blue Marble imagery (since that does show the Great Lakes) and processing it into the appropriate tiles.

Let me know if you plan on doing this and I can give you greater specifics on what's required.

- Joe