Hugo thanks for your answer, however:

The QGraphicsView widget and subclass for the scene were already created, and 
the main image displays good. I'm looking for help for getting 
georeferenced-display of the foreground (on top of the previous)... I have a 
collection of GeoTIFF maps (NOAA nautical charts, that already have the 
"hotspot info" Hugo talks about, as raster data).
Last night I found QGIS, a Geographic Information System with GDAL and GRASS 
bindings for PyQt. As far as I have read, I can convert my code in a "plugin" 
for the geographic information attached in the geoTIFFs to be captured and 
manipulated - STILL READING TO LEARN THOUGH -

Am I in a good track? Does someone has another idea or recommendation? Am I 
right with the usefulness of QGIS?

Thanks,

M. Angelica Echavarria-Gregory
Ph.D Candidate
University of Miami
Phone 305 284-3611

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