Geometry Operations

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Buffering

>>> from geoscript import geom

>>> point = geom.Point(0, 0)
>>> poly = point.buffer(10)
>>> poly
POLYGON ((10 0, 9.807852804032304 ... 1.9509032201612437, 10 0))

>> var GEOM = require("geoscript/geom");

>> var point = new GEOM.Point([0, 0]);
>> var poly = point.buffer(10);
>> poly
<Polygon [[[10, 0], [9.807852804032304, -1.9509032201612824], [9.2387...>

scala> import org.geoscript.geometry._
scala> val p = Point(0, 0)
p: org.geoscript.geometry.Point = POINT (0 0)

scala> val poly = p.buffer(10)
poly: org.geoscript.geometry.Geometry = POLYGON ((10 0, 9.807852804032304 -1.9509032201612824, 9.238795325112868 -3.826834323650898, 8.314696123025453 -5.555702330196022, 7.0710678118654755 -7.071067811865475, 5.555702330196023 -8.314696123025453, 3.8268343236508984 -9.238795325112868, 1.9509032201612833 -9.807852804032304, 0.0000000000000006 -10, -1.950903220161282 -9.807852804032304...

groovy:000> import geoscript.geom.*
===> [import geoscript.geom.*]

groovy:000> p = new Point(0,0)
===> POINT (0 0)

groovy:000> poly = p.buffer(10)
===> POLYGON ((10 0, 9.807852804032304 -1.9509032201612824, 9.238795325112868 -3.826834323650898, 8.314696123025453 -5.555702330196022, 7.0710678118654755 -7.071067811865475, 5.555702330196023 -8.314696123025453, 3.8268343236508984 -9.238795325112868, 1.9509032201612833 -9.807852804032304, 0.0000000000000006 -10, -1.950903220161282 -9.807852804032304, -3.826834323650897 -9.238795325112868, -5.55570233019602 -8.314696123025453, -7.071067811865475 -7.0710678118654755, -8.314696123025453 -5.555702330196022, -9.238795325112868 -3.8268343236508944, -9.807852804032306 -1.9509032201612773, -10 0.0000000000000077, -9.807852804032303 1.9509032201612921, -9.238795325112862 3.826834323650909, -8.314696123025445 5.555702330196034, -7.071067811865463 7.071067811865487, -5.555702330196008 8.314696123025463, -3.826834323650879 9.238795325112875, -1.9509032201612606 9.807852804032308, 0.0000000000000248 10, 1.950903220161309 9.807852804032299, 3.8268343236509246 9.238795325112857, 5.555702330196048 8.314696123025435, 7.071067811865499 7.0710678118654515, 8.314696123025472 5.555702330195993, 9.238795325112882 3.826834323650863, 9.807852804032311 1.9509032201612437, 10 0))

Centroid

>>> from geoscript import geom

>>> poly = geom.fromWKT('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))')
>>> poly.centroid
POINT (5 5)

>> var GEOM = require("geoscript/geom");

>> var poly = GEOM.fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))");
>> poly.centroid
<Point [5, 5]>

scala> import org.geoscript.geometry._
scala> val poly = Geometry.fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))")
poly: org.geoscript.geometry.Geometry = POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))

scala> poly.centroid
res0: org.geoscript.geometry.Point = POINT (5 5)

groovy:000> import geoscript.geom.*
===> [import geoscript.geom.*]

groovy:000> poly = Geometry.fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))")
===> POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))

groovy:000> poly.centroid
===> POINT (5 5)

Visualizing

>>> from geoscript import geom
>>> from geoscript import viewer

>>> poly = geom.fromWKT('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))')
>>> viewer.draw(poly)

>>> line = geom.LineString((2, 2), (8, 8))
>>> viewer.draw(line)

>>> viewer.draw([poly, line, geom.Point(5, 5).buffer(1)])

>> var GEOM = require("geoscript/geom");
>> var VIEWER = require("geoscript/viewer");

>> var poly = GEOM.fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))");
>> VIEWER.draw(poly)

>> var line = new GEOM.LineString([[2, 2], [8, 9]]);
>> VIEWER.draw(line)

>> VIEWER.draw([poly, line, new GEOM.Point([5, 5]).buffer(1)])

scala> import org.geoscript.geometry._
scala> import org.geoscript.viewer._
scala> import org.geoscript.GeoScript._
scala> val poly = Geometry.fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))")
poly: org.geoscript.geometry.Geometry = POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))

scala> Viewer.draw(poly)

scala> val line = LineString((2, 2), (8, 8))
line: org.geoscript.geometry.LineString = LINESTRING (2 2, 8 8)

scala> Viewer.draw(line)

scala> Viewer.draw(List(poly, line, Point(5, 5).buffer(1)))

groovy:000> import geoscript.geom.*
===> [import geoscript.geom.*]

groovy:000> import geoscript.viewer.Viewer
===> [import geoscript.geom.*, import geoscript.viewer.Viewer]

groovy:000> poly = Geometry.fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))")
===> POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))

groovy:000> Viewer.draw(poly)
===> null

groovy:000> line = new LineString([2,2],[8,8])
===> LINESTRING (2 2, 8 8)

groovy:000> Viewer.draw(line)
===> null

groovy:000> Viewer.draw([poly, line, new Point(5,5).buffer(1)])
===> null