[ncl-talk] MAPTRN behavior between CGM and SVG output formats

[Rick Brownrigg]

Hi John,

I'm a bit confused as to what you are saying -- which program drew the
red-outlined dot -- the fortran or powerpoint?

Rick

On Mon, Mar 28, 2022 at 9:39 AM John Prinos via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> We have been using NCAR EZMAP output in CGM for almost 2 decades. We now
> need to switch to SVG format because Microsoft has dropped any support for
> the CGM format.
>
>
>
> In my program, I output image coordinates  derived from MAPTRN calls to an
> ascii file and read in the image coordinates for cities on my output map
> using a Powerpoint macro. Unfortunately, the cities plotted, in relation to
> the SVG map are incorrect. The center city looks to be plotted correctly
> but cities away from the image center seem to be off.
>
>
>
> Here is an image to clarify:
>
>
>
>
>
> Toronto is in the center of the map. Montreal is off center. You can see
> the correct point for Montreal, printed with the red bordered point in the
> FORTRAN program and the point plotted by the PowerPoint macro using the
> coordinates written from the same MAPTRN call from within the program. The
> 2 Montreal dots do not align.
>
>
>
> My question is: Is the SVG file output scaled inadvertently by default?
> Are there calls which would affect this?
>
>
>
> Code snippet:
>
>
>
>
>
> Thanks in advance!
>
>
>
> JOHN PRINOS
>
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