I have a raster file in ESRI ArcGrid format (e.g. hdr.adf). I would like to run
some analysis using GeoTools. I've never used the GDAL plugin before and I'm
having a few problems out of the gates. Specifically, I'm getting a null
pointer exception when I try to read the ArcGrid file. I can instantiate the
AIGReader just fine and I get the correct values when I check the bounds but
the BaseGDALGridCoverage2DReader.read() method is throwing an error. Here's the
code:
BaseGDALGridCoverage2DReader reader = new AIGReader(file);
System.out.println(reader.getSource());
System.out.println(reader.getOriginalEnvelope());
System.out.println(reader.getOriginalGridRange());
GridCoverage2D gc = (GridCoverage2D) reader.read(null);
The read method throws the following Exception:
Exception in thread "main" java.lang.NullPointerException
at
org.geotools.coverageio.RasterLayerRequest.setBaseParameters(RasterLayerRequest.java:902)
at
org.geotools.coverageio.RasterLayerRequest.<init>(RasterLayerRequest.java:206)
at
org.geotools.coverageio.BaseGridCoverage2DReader.read(BaseGridCoverage2DReader.java:400)
I tried passing in an array of GeneralParameterValue but I still get a null
pointer exception. Example:
ParameterValue<OverviewPolicy> policy =
AbstractGridFormat.OVERVIEW_POLICY.createValue();
policy.setValue(OverviewPolicy.IGNORE);
ParameterValue<String> gridsize =
AbstractGridFormat.SUGGESTED_TILE_SIZE.createValue();
ParameterValue<Boolean> useJaiRead =
AbstractGridFormat.USE_JAI_IMAGEREAD.createValue();
useJaiRead.setValue(true);
reader.read(new GeneralParameterValue[]{policy, gridsize, useJaiRead});
I'm using Java 1.6 so I'm stuck with GeoTools 10.8.
Any suggestions?
Thanks,Peter
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