Hi folks,
I am struggling with what I believe should be a fairly simple task and
hoping someone can be kind enough to point me in the right direction.
I have coordinates in WGS84 and I wish to paint an image in an arctic
projection. For various reasons I can't use Mapnik, Geoserver etc for
this, but do need to manually convert to pixel coords.
I am able to convert the coordinates using this:
CoordinateReferenceSystem sourceCRS = CRS.decode("EPSG:4326");
CoordinateReferenceSystem targetCRS = CRS.decode("EPSG:3575");
Point point = GEOMETRY_FACTORY.createPoint(new Coordinate(lat, lng));
MathTransform transform = CRS.findMathTransform(sourceCRS, targetCRS,
true); // lenient
I am struggling to convert those onto the "canvas" - i.e. given a
4096x4096 world tile, locate the pixels on the tile for each
coordinates. I suspect I should be using something like the
worldToScreenTransform to locate the pixel addresses within the image:
AffineTransform t = RendererUtilities.worldToScreenTransform(...)
But I can't work out how to use it, what envelopes are etc.
Could anyone please point me at a code snippet, or give some advice?
Thanks,
Tim
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