[Geotools-devel] [jira] (GEOT-4350) Renderer 2D 3D Bridge results in non-invertable transform exception

Sun, 16 Dec 2012 04:17:56 -0800

Issue Type: Sub-task Sub-task
Affects Versions: 9.0-M1
Assignee: Andrea Aime
Components: render
Created: 16/Dec/12 6:17 AM
Description:

This may not strictly be a GeoTools issue, it is just that the stack trace is coming out of the renderer module so I am going to start my bug hunt there.

Andrea was kind enough to submit recast my 3D-2D downcast as a MathTransform and cleanly adapt the renderer code to expect a MathTransform (rather than a MathTransform2D).

Unfortunately this is producing the following exception:

2012-12-11 10:28:29,817 ERROR [org.geotools.rendering] - Transform is not invertible.
org.opengis.referencing.operation.NoninvertibleTransformException: Transform is not invertible.
	at org.geotools.referencing.operation.transform.ProjectiveTransform.inverse(ProjectiveTransform.java:511)
	at org.geotools.referencing.operation.transform.ProjectiveTransform2D.inverse(ProjectiveTransform2D.java:49)
	at org.geotools.referencing.operation.transform.ProjectiveTransform2D.inverse(ProjectiveTransform2D.java:31)
	at org.geotools.referencing.operation.transform.ConcatenatedTransform.inverse(ConcatenatedTransform.java:524)
	at org.geotools.renderer.lite.StreamingRenderer$RenderableFeature.getTransformedShape(StreamingRenderer.java:3277)
	at org.geotools.renderer.lite.StreamingRenderer$RenderableFeature.getShape(StreamingRenderer.java:3229)
	at org.geotools.renderer.lite.StreamingRenderer.processSymbolizers(StreamingRenderer.java:2749)
	at org.geotools.renderer.lite.StreamingRenderer.process(StreamingRenderer.java:2661)
	at org.geotools.renderer.lite.StreamingRenderer.drawPlain(StreamingRenderer.java:2494)
	at org.geotools.renderer.lite.StreamingRenderer.processStylers(StreamingRenderer.java:2044)
	at org.geotools.renderer.lite.StreamingRenderer.paint(StreamingRenderer.java:828)
	at org.geoserver.wms.map.RenderedImageMapOutputFormat.produceMap(RenderedImageMapOutputFormat.java:490)
	at org.geoserver.wms.map.RenderedImageMapOutputFormat.produceMap(RenderedImageMapOutputFormat.java:254)
	at org.geoserver.wms.map.RenderedImageMapOutputFormat.produceMap(RenderedImageMapOutputFormat.java:126)
	at org.geoserver.wms.GetMap.executeInternal(GetMap.java:465)
	at org.geoserver.wms.GetMap.run(GetMap.java:201)
	at org.geoserver.wms.GetMap.run(GetMap.java:111)
	at org.geoserver.wms.DefaultWebMapService.getMap(DefaultWebMapService.java:356)
...
Caused by: javax.vecmath.MismatchedSizeException: cannot invert non square matrix
	at javax.vecmath.GMatrix.invertGeneral(Unknown Source)
	at javax.vecmath.GMatrix.invert(Unknown Source)
	at org.geotools.referencing.operation.transform.ProjectiveTransform.inverse(ProjectiveTransform.java:505)
	... 124 more



The exception seems fair, we cannot strictly invert this matrix - formally we are going with the assumption that WGS84 at 0 height will be fine (for what we hope is a bounding box calculation. If we want to be slightly kinder we could use WGS84 at the height of mount everest to cast a slightly wider bounding box conversion...



I expect we will need to:



1. Make a second MathTransform going the other way (armed with the above height assumption)

2. Fill in a MathTransform.inverse() method
Environment: oracle 11g XE
Project: GeoTools
Priority: Major Major
Reporter: Jody Garnett
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