Creating a wedge shape with Geotools

Question

I am on the hook for creating a service which will create a shape based on data provided with a center point. I am working with geotools which I am not very experienced with, however I am getting more familiar with it.

I am receiving data which looks like this:

{
    "shape": {
    "latitude": 43.87,
    "longitude": -103.45,
    "parameters": [
        0.0,
        120.0,
        1000.0
    ],
    "shapeString": "WEDGE (-103.45,43.87) AZIMUTH:0.0 ANGLE:120.0 RADIUS:1000.0"
  }
}

I am assuming there is a way to create this shape in geotools but I am just so unfamiliar with it I haven't been able to do it. I have seen the ability to create polygons, however it looks like I would have to have several sets of lat,lon to create that type of shape.

score 1 · Accepted Answer · answered Jun 03 '18 at 11:13

I wrote a program to solve a similar problem some time ago.

Basically, the trick is to use the GeodeticCalculator to work out the coordinates of the curved section of the wedge and the join the start and end to the starting point.

ArrayList<Coordinate> coords = new ArrayList<>();
// start at the tower
coords.add(point.getCoordinate());
// next the edge of the wedge
int nSteps = 10;
// assume width of 10 degrees
double width = 10.0;
double dStep = width/nSteps;
for (int i = -nSteps; i < nSteps; i++) {
  CALC.setStartingGeographicPoint(point.getX(), point.getY());
  CALC.setDirection((azimuth +(i*dStep)), radius);
  Point2D p = CALC.getDestinationGeographicPoint();
  coords.add(new Coordinate(p.getX(), p.getY()));
}
// end at the tower
coords.add(point.getCoordinate());
poly = GF.createPolygon(coords.toArray(new Coordinate[] {}));

Creating a wedge shape with Geotools

1 Answers1