org.autoplot.pngwalk.RichPngUtil

At the 2012 MMS meeting at UNH, a group of us proposed that we embed a little metadata within PNG images which provides lookup information in JSON format. Here is an example:

 { "size":[722,639],
 "numberOfPlots":1,
 "plots": [
    {
      "title":"AC/MFI  [PRELIMINARY VALUES - BROWSE USE ONLY] B-field magnitude", 
      "xaxis": { "label":"", "min":"2014-01-02T00:00:00.000Z", "max":"2014-01-03T00:00:00.000Z", "left":78, "right":644, "type":"lin", "units":"UTC" },
      "yaxis": { "label":"[PRELIM] <|B|> (nT)", "min":4.440892098500626E-16, "max":8.9, "top":52, "bottom":587, "type":"lin", "units":"nT" }
    }
 ] }

RichPngUtil( )

getRange

return the range setting of the axis. This looks at the "min" and "max" keys of the axis node.

Parameters

Returns:

getXRange

attempt to get the time range of the plots, looking at each x axis for a timerange.

Parameters

Returns: