Hi everybody, I'am a newbie in using Geotools and I have the following problem:I need to "vectorize" polygons from black & white raster in 'test.tif' format.
I was trying to follow those documentations: - http://docs.geotools.org/latest/userguide/library/coverage/grid.html - http://docs.geotools.org/latest/javadocs/ When I open my tif in qgis, it says that the projection is: +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs Nevertheless with: final File file = new File("/home/jirka/hibernate-spatial/event-tutorial/test.tif"); AbstractGridFormat format = GridFormatFinder.findFormat(file); AbstractGridCoverage2DReader reader = format.getReader(file); I just get: Exception in thread "main" java.lang.UnsupportedOperationException: Trying to get a reader from an unknown format.at org.geotools.coverage.grid.io.UnknownFormat.getReader(UnknownFormat.java:62)
at event.App.main(App.java:42)When following the tests (http://svn.osgeo.org/geotools/trunk/modules/plugin/geotiff/src/test/java/org/geotools/gce/geotiff/GeoTiffReaderTest.java) and trying:
final File file = new
File("/home/jirka/hibernate-spatial/event-tutorial/test.tif");
// hint for CRS
CoordinateReferenceSystem crs = CRS.decode("EPSG:4326", true);
final Hints hint = new Hints();
hint.put(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM, crs);
// getting a reader
GeoTiffReader reader = new GeoTiffReader(file, hint);
I get:
Exception in thread "main" org.geotools.data.DataSourceException:
Raster to Model
Transformation is not available
at org.geotools.gce.geotiff.GeoTiffReader.<init>(GeoTiffReader.java:228)
at event.App.main(App.java:37)
Caused by:
org.geotools.data.DataSourceException: Raster to Model
Transformation is not available
at org.geotools.gce.geotiff.GeoTiffReader.getHRInfo(GeoTiffReader.java:385)
at org.geotools.gce.geotiff.GeoTiffReader.<init>(GeoTiffReader.java:215)
... 1 more
My maven dependencies settings are:
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-process</artifactId>
<version>8.0-M1</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-geotiff</artifactId>
<version>8.0-M1</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-image</artifactId>
<version>8.0-M1</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-coverage</artifactId>
<version>8.0-M1</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>8.0-M1</version>
</dependency>
Could anybody give me some hint (workaround) how to get this tif
(probably with not properly set metadata information) vectorized?
Thank you very much, for any piece of information, Jiri Novak
<<attachment: test.tif>>
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