@DescribeResult(name = "result", description = "The contours feature collection")
public SimpleFeatureCollection execute(
@DescribeParameter(name = "data", description = "The raster to be used as the source")
GridCoverage2D gc2d,
@DescribeParameter(
name = "band",
description = "The source image band to process",
min = 0,
max = 1)
Integer band,
@DescribeParameter(name = "levels", description = "Values for which to generate contours")
double[] levels,
@DescribeParameter(
name = "interval",
description = "Interval between contour values (ignored if levels arg is supplied)",
min = 0)
Double interval,
@DescribeParameter(
name = "simplify",
description = "Values for which to generate contours",
min = 0)
Boolean simplify,
@DescribeParameter(
name = "smooth",
description = "Values for which to generate contours",
min = 0)
Boolean smooth,
@DescribeParameter(
name = "roi",
description = "The geometry used to delineate the area of interest in model space",
min = 0)
Geometry roi,
ProgressListener progressListener)
throws ProcessException {
//
// initial checks
//
if (gc2d == null) {
throw new ProcessException("Invalid input, source grid coverage should be not null");
}
if (band != null && (band < 0 || band >= gc2d.getNumSampleDimensions())) {
throw new ProcessException("Invalid input, invalid band number:" + band);
}
boolean hasValues = !(levels == null || levels.length == 0);
if (!hasValues && interval == null) {
throw new ProcessException("One between interval and values must be valid");
}
// switch to geophisics if necessary
gc2d = gc2d.view(ViewType.GEOPHYSICS);
//
// GRID TO WORLD preparation
//
final AffineTransform mt2D =
(AffineTransform) gc2d.getGridGeometry().getGridToCRS2D(PixelOrientation.CENTER);
// get the list of nodata, if any
List<Object> noDataList = new ArrayList<Object>();
for (GridSampleDimension sd : gc2d.getSampleDimensions()) {
// grab all the explicit nodata
final double[] sdNoData = sd.getNoDataValues();
if (sdNoData != null) {
for (double nodata : sdNoData) {
noDataList.add(nodata);
}
}
// handle also readers setting up nodata in a category with a specific name
if (sd.getCategories() != null) {
for (Category cat : sd.getCategories()) {
if (cat.getName().equals(NO_DATA)) {
final NumberRange<? extends Number> catRange = cat.getRange();
if (catRange.getMinimum() == catRange.getMaximum()) {
noDataList.add(catRange.getMinimum());
} else {
Range<Double> noData =
new Range<Double>(
catRange.getMinimum(),
catRange.isMinIncluded(),
catRange.getMaximum(),
catRange.isMaxIncluded());
noDataList.add(noData);
}
}
}
}
}
// get the rendered image
final RenderedImage raster = gc2d.getRenderedImage();
// perform jai operation
ParameterBlockJAI pb = new ParameterBlockJAI("Contour");
pb.setSource("source0", raster);
if (roi != null) {
pb.setParameter("roi", CoverageUtilities.prepareROI(roi, mt2D));
}
if (band != null) {
pb.setParameter("band", band);
}
if (interval != null) {
pb.setParameter("interval", interval);
} else {
final ArrayList<Double> elements = new ArrayList<Double>(levels.length);
for (double level : levels) elements.add(level);
pb.setParameter("levels", elements);
}
if (simplify != null) {
pb.setParameter("simplify", simplify);
}
if (smooth != null) {
pb.setParameter("smooth", smooth);
}
if (noDataList != null) {
pb.setParameter("nodata", noDataList);
}
final RenderedOp dest = JAI.create("Contour", pb);
@SuppressWarnings("unchecked")
final Collection<LineString> prop =
(Collection<LineString>) dest.getProperty(ContourDescriptor.CONTOUR_PROPERTY_NAME);
// wrap as a feature collection and return
final SimpleFeatureType schema = CoverageUtilities.createFeatureType(gc2d, LineString.class);
final SimpleFeatureBuilder builder = new SimpleFeatureBuilder(schema);
int i = 0;
final ListFeatureCollection featureCollection = new ListFeatureCollection(schema);
final AffineTransformation jtsTransformation =
new AffineTransformation(
mt2D.getScaleX(),
mt2D.getShearX(),
mt2D.getTranslateX(),
mt2D.getShearY(),
mt2D.getScaleY(),
mt2D.getTranslateY());
for (LineString line : prop) {
// get value
Double value = (Double) line.getUserData();
line.setUserData(null);
// filter coordinates in place
line.apply(jtsTransformation);
// create feature and add to list
builder.set("the_geom", line);
builder.set("value", value);
featureCollection.add(builder.buildFeature(String.valueOf(i++)));
}
// return value
return featureCollection;
}
/**
* Executes the raster to vector process.
*
* @param coverage the input grid coverage
* @param band the coverage band to process; defaults to 0 if {@code null}
* @param insideEdges whether boundaries between raster regions with data values (ie. not NODATA)
* should be returned; defaults to {@code true} if {@code null}
* @param roi optional polygonal {@code Geometry} to define a sub-area within which vectorizing
* will be done
* @param noDataValues optional list of values to treat as NODATA; regions with these values will
* not be represented in the returned features; if {@code null}, 0 is used as the single
* NODATA value; ignored if {@code classificationRanges} is provided
* @param classificationRanges optional list of {@code Range} objects to pre-classify the input
* coverage prior to vectorizing; values not included in the list will be treated as NODATA;
* values in the first {@code Range} are classified to 1, those in the second {@code Range} to
* 2 etc.
* @param progressListener an optional listener
* @return a feature collection where each feature has a {@code Polygon} ("the_geom") and an
* attribute "value" with value of the corresponding region in either {@code coverage} or the
* classified coverage (when {@code classificationRanges} is used)
* @throws ProcessException
*/
@DescribeResult(name = "result", description = "The polygon feature collection")
public SimpleFeatureCollection execute(
@DescribeParameter(name = "data", description = "The raster to be used as the source")
GridCoverage2D coverage,
@DescribeParameter(
name = "band",
description = "(Integer, default=0) the source image band to process",
min = 0)
Integer band,
@DescribeParameter(
name = "insideEdges",
description =
"(Boolean, default=true) whether to vectorize boundaries between adjacent regions with non-outside values",
min = 0)
Boolean insideEdges,
@DescribeParameter(
name = "roi",
description = "The geometry used to delineate the area of interest in model space",
min = 0)
Geometry roi,
@DescribeParameter(
name = "nodata",
description = "Collection<Number>, default={0}) values to treat as NODATA",
collectionType = Number.class,
min = 0)
Collection<Number> noDataValues,
@DescribeParameter(
name = "ranges",
description =
"The list of ranges to be applied. \n"
+ "Each range is expressed as 'OPEN START ; END CLOSE'\n"
+ "where 'OPEN:=(|[, CLOSE=)|]',\n "
+ "START is the low value, or nothing to imply -INF,\n"
+ "CLOSE is the biggest value, or nothing to imply +INF",
collectionType = Range.class,
min = 0)
List<Range> classificationRanges,
ProgressListener progressListener)
throws ProcessException {
//
// initial checks
//
if (coverage == null) {
throw new ProcessException("Invalid input, source grid coverage should be not null");
}
if (band == null) {
band = 0;
} else if (band < 0 || band >= coverage.getNumSampleDimensions()) {
throw new ProcessException("Invalid input, invalid band number:" + band);
}
// do we have classification ranges?
boolean hasClassificationRanges =
classificationRanges != null && classificationRanges.size() > 0;
// apply the classification by setting 0 as the default value and using 1, ..., numClasses for
// the other classes.
// we use 0 also as the noData for the resulting coverage.
if (hasClassificationRanges) {
final RangeLookupProcess lookup = new RangeLookupProcess();
coverage = lookup.execute(coverage, band, classificationRanges, progressListener);
}
// Use noDataValues to set the "outsideValues" parameter of the Vectorize
// operation unless classificationRanges are in use, in which case the
// noDataValues arg is ignored.
List<Number> outsideValues = new ArrayList<Number>();
if (noDataValues != null && !hasClassificationRanges) {
outsideValues.addAll(noDataValues);
} else {
outsideValues.add(0);
}
//
// GRID TO WORLD preparation
//
final AffineTransform mt2D =
(AffineTransform) coverage.getGridGeometry().getGridToCRS2D(PixelOrientation.UPPER_LEFT);
// get the rendered image
final RenderedImage raster = coverage.getRenderedImage();
// perform jai operation
ParameterBlockJAI pb = new ParameterBlockJAI("Vectorize");
pb.setSource("source0", raster);
if (roi != null) {
pb.setParameter("roi", CoverageUtilities.prepareROI(roi, mt2D));
}
pb.setParameter("band", band);
pb.setParameter("outsideValues", outsideValues);
if (insideEdges != null) {
pb.setParameter("insideEdges", insideEdges);
}
// pb.setParameter("removeCollinear", false);
final RenderedOp dest = JAI.create("Vectorize", pb);
@SuppressWarnings("unchecked")
final Collection<Polygon> prop =
(Collection<Polygon>) dest.getProperty(VectorizeDescriptor.VECTOR_PROPERTY_NAME);
// wrap as a feature collection and return
final SimpleFeatureType featureType =
CoverageUtilities.createFeatureType(coverage, Polygon.class);
final SimpleFeatureBuilder builder = new SimpleFeatureBuilder(featureType);
int i = 0;
final ListFeatureCollection featureCollection = new ListFeatureCollection(featureType);
final AffineTransformation jtsTransformation =
new AffineTransformation(
mt2D.getScaleX(),
mt2D.getShearX(),
mt2D.getTranslateX(),
mt2D.getShearY(),
mt2D.getScaleY(),
mt2D.getTranslateY());
for (Polygon polygon : prop) {
// get value
Double value = (Double) polygon.getUserData();
polygon.setUserData(null);
// filter coordinates in place
polygon.apply(jtsTransformation);
// create feature and add to list
builder.set("the_geom", polygon);
builder.set("value", value);
featureCollection.add(builder.buildFeature(String.valueOf(i++)));
}
// return value
return featureCollection;
}
public boolean extractTiffMetadata(File tifFile, TiffMeta surface)
throws UnknownCRSException, FactoryException, TransformException, IOException {
Preconditions.checkArgument(tifFile != null, "File is null.");
GeoTiffReader gtr = new GeoTiffReader(tifFile);
try {
CoordinateReferenceSystem crs = gtr.getCoordinateReferenceSystem();
surface.setCRS(crs);
Integer epsgCode = CRS.lookupEpsgCode(crs, true);
if (epsgCode == null) {
ReferenceIdentifier name = crs.getName();
String crsName = "Unknown";
if (name != null) {
crsName = name.toString();
}
throw new UnknownCRSException(crsName);
}
String srid = "EPSG:" + epsgCode;
surface.setSrid(srid);
//
// extremaOp(surface, gtr.read(null));
/*
* Build the envelope and set to WGS84
*/
GeneralEnvelope origEnv = gtr.getOriginalEnvelope();
DirectPosition ll = origEnv.getLowerCorner();
DirectPosition ur = origEnv.getUpperCorner();
Envelope e = new Envelope();
e.expandToInclude(ll.getOrdinate(0), ll.getOrdinate(1));
e.expandToInclude(ur.getOrdinate(0), ur.getOrdinate(1));
Geometry poly = envelopeToWgs84(epsgCode, e);
if (poly instanceof Polygon) {
surface.setEnvelope((Polygon) poly);
}
/*
* Figure out the pixel size
*/
ImageLayout imageLayout = gtr.getImageLayout();
int imageWidth = imageLayout.getWidth(null);
int imageHeight = imageLayout.getHeight(null);
double pixelSizeX = e.getWidth() / imageWidth;
double pixelSizeY = e.getHeight() / imageHeight;
surface.setPixelSizeX(pixelSizeX);
surface.setPixelSizeY(pixelSizeY);
surface.setMinVal(0d);
surface.setMaxVal(100d);
GridCoverage2D gridCoverage2D = gtr.read(null);
try {
int nDims = gridCoverage2D.getNumSampleDimensions();
surface.setNumSampleDimensions(nDims);
extremaOp(surface, gridCoverage2D);
} finally {
gridCoverage2D.dispose(false);
}
} finally {
gtr.dispose();
}
return true;
}