Hi All,
Basically I am reading a geotiff file via geoserver and in turn cropping (the
scaling) a region of interest. The problem is the area I am getting back from
crop is 1x1 pixel.
I am using crop in Crop.java (geoserver 2.8.2 with the geotools provided with
it) and I am getting back results I do not expect. Below I list the functions
with what I know about input/output to hopefully determine what the issue is
and hopefully recommendations to fix.
//from geoserver passed onto extension?
final GridCoverage2D coverage = coverageReader.read(CoverageUtils.getParameters(
coverageReader.getFormat().getReadParameters(), parameters,
true));
param.parameter("Source").setValue(coverage); //source in Crop.doOperation()
Crop.doOperation()
-------------------------------------------------------------------------------------------------------------------
source = (GridCoverage2D) sourceParameter.getValue();
final AffineTransform sourceCornerGridToWorld = (AffineTransform)
((GridGeometry2D) source
.getGridGeometry())
.getGridToCRS(PixelInCell.CELL_CORNER);
The intersectionEnvelope has : lower corner of -140, -10 and upper corner of
-120,10
Crop.BuildResults()
-----------------------------------------------------------------------------------------------------------------The
cropEnvelope created inside crop has Min/Max x,y values for:
lower corner: -140, -10 and the upper corner -120, 10
The sourceWorldToGridTransform is the inverse transform of
sourceGridToWorldTransform which is the sourceCornerGridToWorld transform.
The cropEnvelope above are the values just before:final Rectangle2D
finalRasterAreaDouble = XAffineTransform
.transform(sourceWorldToGridTransform,
cropEnvelope.toRectangle2D(), null);
The finalRasterAreaDouble are 23040,11520 and 23041, 115201
// intersection with the original range in order to not try to crop
// outside the image bounds
Rectangle.intersect(finalRasterArea, sourceGridRange,
finalRasterArea);
The finalRasterAreaDouble is still after the above Rectangle.intersect
23040,11520 and 23041, 115201
internalROI is null
At the end of Build Results method inside Crop.java:
I am getting back a coverage of width 1 and height 1. The minx and min y are
23040 and 11520 respectively.
Any ideas? I am suspecting something wrong about the first transform when you
get into BuildResults(). Why would the resultant rectangle be in the middle of
the image and one pixel apart for the final raster area?
Best Regards,-Tony
------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance
APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
Monitor end-to-end web transactions and take corrective actions now
Troubleshoot faster and improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
_______________________________________________
GeoTools-GT2-Users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
