import java.util.HashMap;
import java.util.List;
import java.util.Map;
+import java.util.Objects;
import javax.measure.Quantity;
import javax.measure.quantity.Area;
+import javax.xml.transform.TransformerException;
import org.geotools.data.DefaultTransaction;
import org.geotools.data.Transaction;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.data.simple.SimpleFeatureStore;
+import org.geotools.factory.CommonFactoryFinder;
import org.geotools.geometry.jts.JTS;
import org.geotools.referencing.CRS;
import org.geotools.referencing.crs.DefaultGeographicCRS;
+import org.geotools.styling.AnchorPoint;
+import org.geotools.styling.Displacement;
+import org.geotools.styling.FeatureTypeConstraint;
+import org.geotools.styling.FeatureTypeStyle;
+import org.geotools.styling.Fill;
+import org.geotools.styling.Graphic;
+import org.geotools.styling.NamedLayer;
+import org.geotools.styling.PointSymbolizer;
+import org.geotools.styling.Rule;
+import org.geotools.styling.Stroke;
+import org.geotools.styling.Style;
+import org.geotools.styling.StyleFactory;
+import org.geotools.styling.StyledLayerDescriptor;
+import org.geotools.styling.UserLayer;
+import org.geotools.styling.css.CssParser;
+import org.geotools.styling.css.CssTranslator;
+import org.geotools.styling.css.Stylesheet;
+import org.geotools.xml.styling.SLDTransformer;
+import org.locationtech.jts.algorithm.hull.ConcaveHull;
import org.locationtech.jts.geom.Coordinate;
+import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.Point;
import org.locationtech.jts.geom.Polygon;
+import org.locationtech.jts.geom.util.GeometryFixer;
+import org.locationtech.jts.operation.polygonize.Polygonizer;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
+import org.opengis.filter.Filter;
+import org.opengis.filter.FilterFactory2;
+import org.opengis.filter.expression.Expression;
import org.opengis.geometry.MismatchedDimensionException;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.TransformException;
+import org.opengis.style.GraphicalSymbol;
import si.uom.SI;
import tech.units.indriya.quantity.Quantities;
/** Utilities around geographical format, mostly wrapping GeoTools patterns. */
public class GeoUtils {
+ public final static String EPSG_4326 = "EPSG:4326";
/** In square meters. */
public static Quantity<Area> calcArea(SimpleFeature feature) {
try {
- Polygon p = (Polygon) feature.getDefaultGeometry();
- Point centroid = p.getCentroid();
+ Polygon polygon = (Polygon) feature.getDefaultGeometry();
+ Point centroid = polygon.getCentroid();
+// CoordinateReferenceSystem crs = feature.getDefaultGeometryProperty().getType()
+// .getCoordinateReferenceSystem();
+ // TODO convert the centroid
+// if (!crs.getName().equals(DefaultGeographicCRS.WGS84.getName()))
+// throw new IllegalArgumentException("Only WGS84 CRS is currently supported");
+
+ // create automatic CRS for optimal computation
String code = "AUTO:42001," + centroid.getX() + "," + centroid.getY();
CoordinateReferenceSystem auto = CRS.decode(code);
MathTransform transform = CRS.findMathTransform(DefaultGeographicCRS.WGS84, auto);
- Polygon projed = (Polygon) JTS.transform(p, transform);
+ Polygon projed = (Polygon) JTS.transform(polygon, transform);
+ return Quantities.getQuantity(projed.getArea(), SI.SQUARE_METRE);
+ } catch (MismatchedDimensionException | FactoryException | TransformException e) {
+ throw new IllegalStateException("Cannot calculate area of feature", e);
+ }
+ }
+
+ /** In square meters. The {@link Polygon} must use WGS84 coordinates. */
+ public static Quantity<Area> calcArea(Polygon polygon) {
+ assert polygon.getSRID() == 0 || polygon.getSRID() == 4326;
+ return calcArea(polygon, DefaultGeographicCRS.WGS84, polygon.getCentroid());
+ }
+
+ public static Quantity<Area> calcArea(Polygon polygon, CoordinateReferenceSystem crs, Point wgs84centroid) {
+ try {
+ // create automatic CRS for optimal computation
+ String code = "AUTO:42001," + wgs84centroid.getX() + "," + wgs84centroid.getY();
+ CoordinateReferenceSystem auto = CRS.decode(code);
+
+ MathTransform transform = CRS.findMathTransform(crs, auto);
+
+ Polygon projed = (Polygon) JTS.transform(polygon, transform);
return Quantities.getQuantity(projed.getArea(), SI.SQUARE_METRE);
} catch (MismatchedDimensionException | FactoryException | TransformException e) {
- throw new IllegalStateException("Cannot claculate area of feature");
+ throw new IllegalStateException("Cannot calculate area of feature", e);
}
}
}
}
+ /*
+ * STYLING
+ */
+
+ public static Style createStyleFromCss(String css) {
+ Stylesheet ss = CssParser.parse(css);
+ CssTranslator translator = new CssTranslator();
+ org.opengis.style.Style style = translator.translate(ss);
+
+// try {
+// SLDTransformer styleTransform = new SLDTransformer();
+// String xml = styleTransform.transform(style);
+// System.out.println(xml);
+// } catch (TransformerException e) {
+// // TODO Auto-generated catch block
+// e.printStackTrace();
+// }
+
+ return (Style) style;
+ }
+
+ public static String createSldFromCss(String name, String title, String css) {
+ StyledLayerDescriptor sld = GeoTools.STYLE_FACTORY.createStyledLayerDescriptor();
+ sld.setName(name);
+ sld.setTitle(title);
+
+ NamedLayer layer = GeoTools.STYLE_FACTORY.createNamedLayer();
+ layer.setName(name);
+
+ Style style = createStyleFromCss(css);
+ layer.styles().add(style);
+
+ sld.layers().add(layer);
+ return sldToXml(sld);
+ }
+
+ public static String sldToXml(StyledLayerDescriptor sld) {
+ try {
+ SLDTransformer styleTransform = new SLDTransformer();
+ String xml = styleTransform.transform(sld);
+// System.out.println(xml);
+ return xml;
+ } catch (TransformerException e) {
+ throw new IllegalStateException("Cannot write SLD as XML", e);
+ }
+ }
+
+ public static void main(String... args) {
+ String css = """
+ * {
+ mark: symbol(circle);
+ mark-size: 6px;
+ }
+
+ :mark {
+ fill: red;
+ }
+
+ """;
+ createSldFromCss("test", "Test", css);
+ }
+
+ public static String createTestSLD() {
+
+ StyleFactory sf = CommonFactoryFinder.getStyleFactory();
+ FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2();
+
+ StyledLayerDescriptor sld = sf.createStyledLayerDescriptor();
+ sld.setName("sld");
+ sld.setTitle("Example");
+ sld.setAbstract("Example Style Layer Descriptor");
+
+ UserLayer layer = sf.createUserLayer();
+ layer.setName("layer");
+
+ //
+ // define constraint limited what features the sld applies to
+ FeatureTypeConstraint constraint = sf.createFeatureTypeConstraint("Feature", Filter.INCLUDE);
+
+ layer.layerFeatureConstraints().add(constraint);
+
+ //
+ // create a "user defined" style
+ Style style = sf.createStyle();
+ style.setName("style");
+ style.getDescription().setTitle("User Style");
+ style.getDescription().setAbstract("Definition of Style");
+
+ //
+ // define feature type styles used to actually define how features are rendered
+ FeatureTypeStyle featureTypeStyle = sf.createFeatureTypeStyle();
+
+ // RULE 1
+ // first rule to draw cities
+ Rule rule1 = sf.createRule();
+ rule1.setName("rule1");
+ rule1.getDescription().setTitle("City");
+ rule1.getDescription().setAbstract("Rule for drawing cities");
+// rule1.setFilter(ff.less(ff.property("POPULATION"), ff.literal(50000)));
+
+ //
+ // create the graphical mark used to represent a city
+ Stroke stroke = sf.stroke(ff.literal("#000000"), null, null, null, null, null, null);
+ Fill fill = sf.fill(null, ff.literal(java.awt.Color.BLUE), ff.literal(1.0));
+
+// // OnLineResource implemented by gt-metadata - so no factory!
+// OnLineResourceImpl svg = new OnLineResourceImpl(new URI("file:city.svg"));
+// svg.freeze(); // freeze to prevent modification at runtime
+//
+// OnLineResourceImpl png = new OnLineResourceImpl(new URI("file:city.png"));
+// png.freeze(); // freeze to prevent modification at runtime
+
+ //
+ // List of symbols is considered in order with the rendering engine choosing
+ // the first one it can handle. Allowing for svg, png, mark order
+ List<GraphicalSymbol> symbols = new ArrayList<>();
+// symbols.add(sf.externalGraphic(svg, "svg", null)); // svg preferred
+// symbols.add(sf.externalGraphic(png, "png", null)); // png preferred
+ symbols.add(sf.mark(ff.literal("circle"), fill, stroke)); // simple circle backup plan
+
+ Expression opacity = null; // use default
+ Expression size = ff.literal(10);
+ Expression rotation = null; // use default
+ AnchorPoint anchor = null; // use default
+ Displacement displacement = null; // use default
+
+ // define a point symbolizer of a small circle
+ Graphic city = sf.graphic(symbols, opacity, size, rotation, anchor, displacement);
+ PointSymbolizer pointSymbolizer = sf.pointSymbolizer("point", ff.property("the_geom"), null, null, city);
+
+ rule1.symbolizers().add(pointSymbolizer);
+
+ featureTypeStyle.rules().add(rule1);
+
+ //
+ // RULE 2 Default
+
+// List<GraphicalSymbol> dotSymbols = new ArrayList<>();
+// dotSymbols.add(sf.mark(ff.literal("circle"), null, null));
+// Graphic dotGraphic = sf.graphic(dotSymbols, null, ff.literal(3), null, null, null);
+// PointSymbolizer dotSymbolizer = sf.pointSymbolizer("dot", ff.property("the_geom"), null, null, dotGraphic);
+// List<org.opengis.style.Symbolizer> symbolizers = new ArrayList<>();
+// symbolizers.add(dotSymbolizer);
+// Filter other = null; // null will mark this rule as "other" accepting all remaining features
+// Rule rule2 = sf.rule("default", null, null, Double.MIN_VALUE, Double.MAX_VALUE, symbolizers, other);
+// featureTypeStyle.rules().add(rule2);
+
+ style.featureTypeStyles().add(featureTypeStyle);
+
+ layer.userStyles().add(style);
+
+ sld.layers().add(layer);
+
+ try {
+ SLDTransformer styleTransform = new SLDTransformer();
+ String xml = styleTransform.transform(sld);
+ System.out.println(xml);
+ return xml;
+ } catch (TransformerException e) {
+ throw new IllegalStateException(e);
+ }
+
+ }
+
+ public static long getScaleFromResolution(long resolution) {
+ // see
+ // https://gis.stackexchange.com/questions/242424/how-to-get-map-units-to-find-current-scale-in-openlayers
+ final double INCHES_PER_UNIT = 39.37;// m
+ // final double INCHES_PER_UNIT = 4374754;// dd
+ final long DOTS_PER_INCH = 72;
+ return Math.round(INCHES_PER_UNIT * DOTS_PER_INCH * resolution);
+ }
+
+ /*
+ * GEOMETRY
+ */
+ /**
+ * Ensure that a {@link Polygon} is valid and simple by removing artefacts
+ * (typically coming from GPS).
+ *
+ * @return a simple and valid polygon, or null if the ignoredArea ratio is above
+ * the provided threshold.
+ */
+ public static Polygon cleanPolygon(Polygon polygon, double ignoredAreaRatio) {
+ Polygonizer polygonizer = new Polygonizer(true);
+ Geometry fixed = GeometryFixer.fix(polygon, false);
+ polygonizer.add(fixed);
+ @SuppressWarnings("unchecked")
+ List<Polygon> polygons = new ArrayList<>(polygonizer.getPolygons());
+
+ if (polygons.size() == 0) {
+ throw new IllegalStateException("Polygonizer failed to extract any polygon");
+ }
+
+ Polygon best;
+ if (polygons.size() == 1) {
+ best = polygons.get(0);
+ } else {
+ double totalArea = fixed.getArea();
+ best = polygons.get(0);
+ double bestArea = best.getArea();
+ for (int i = 1; i < polygons.size(); i++) {
+ Polygon p = polygons.get(i);
+ double a = p.getArea();
+ if (a > bestArea) {
+ best = p;
+ bestArea = a;
+ } else {
+ // double ratio = a / totalArea;
+ }
+ }
+ double ignoredRatio = (totalArea - bestArea) / totalArea;
+ if (ignoredRatio > ignoredAreaRatio)
+ return null;
+
+ if (!best.isValid() || !best.isSimple()) {
+ throw new IllegalStateException("The polygon is not simple and/or valid after cleaning");
+ }
+ }
+ // while we are here, we make sure that the geometry will be normalised
+ best.normalize();
+ return best;
+ }
+
+ /**
+ * The smallest polygon without holes containing all the points in this
+ * geometry.
+ */
+ public static Polygon concaveHull(Geometry geom, double lengthRatio) {
+ Objects.requireNonNull(geom);
+ if (geom.getNumPoints() < 3)
+ throw new IllegalArgumentException("At least 3 points are reuired to compute the concave hull and geometry "
+ + geom.getClass() + " contains only " + geom.getNumPoints());
+ Geometry hull = ConcaveHull.concaveHullByLengthRatio(geom, lengthRatio, false);
+ if (hull instanceof Polygon polygon)
+ return polygon;
+ else
+ throw new IllegalStateException("Hull is not a polygon but a " + hull.getClass());
+ }
+
/** Singleton. */
private GeoUtils() {
}
projects / gpl / argeo-suite.git / blobdiff