Transformations

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Transforming Points

>>> from geoscript.proj import Projection

>>> prj = Projection('epsg:4326')
>>> prj.transform((-111, 45.7), 'epsg:26912')
(499999.42501775385 5060716.092032814)

>>> points = [(-110, 24.5), (-75, 42.4), (-99.2, 33.4)]
>>> for p in points:
...   prj.transform(p, 'epsg:26912')
...
(601317.0399797171, 2709952.3677921756)
(3468687.3452766626, 5369899.957372455)
(1600364.2286890591, 3758545.3568449053)

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

>> var p1 = new GEOM.Point([-111, 45.7]);
>> p1.projection = new PROJ.Projection("epsg:4326");
<Projection EPSG:4326>
>> var p2 = p1.transform("epsg:26912");
>> p2
<Point [500000, 5060716.31816507]>

scala> import org.geoscript.projection._
scala> import org.geoscript.geometry._

scala> val p1 = Point(-111, 45.7) in Projection("epsg:4326")
p1: org.geoscript.geometry.Point = POINT (-111 45.7)

scala> val p2 = p1 in Projection("epsg:26912")
p2: org.geoscript.geometry.Point = POINT (-412539.9935856778 -7830632.25817681)

groovy:000> import geoscript.proj.Projection
===> [import geoscript.proj.Projection]

groovy:000> import geoscript.geom.Point
===> [import geoscript.proj.Projection, import geoscript.geom.Point]

groovy:000> p1 = new Point(-111, 45.7)
===> POINT (-111 45.7)

groovy:000> p2 = Projection.transform(p1, 'epsg:4326', 'epsg:26912')
===> POINT (-412539.9935856778 -7830632.25817681)

Transforming Geometries

>>> from geoscript import geom
>>> from geoscript.proj import Projection

>>> prj = Projection('epsg:4326')
>>> pt = geom.Point(-111, 45.5)
>>> line = geom.LineString((-110.1, 57.6), (-111.5, 50), (-109, 43))
>>> poly = geom.Polygon([(-108.3, 53.1), (-112.7, 47.1), (-109, 43.7), (-108.3, 53.1)])

>>> prj.transform(pt, 'epsg:26912')
POINT (499999.42501775257 5038496.288583793)

>>> prj.transform(line, 'epsg:26912')
LINESTRING (553788.6739161084 6384534.487570734, 464165.9748020574 5538750.135212521, 663018.4534677222 4762755.4960556375)

>>> prj.transform(poly, 'epsg:26912')
POLYGON ((680759.8175153742 5886801.367604256, 370998.67923649476 5217678.697813773, 661154.8855028747 4840496.861362906, 680759.8175153742 5886801.367604256))

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

>> var line = new GEOM.LineString([[-110.1, 57.6], [-111.5, 50], [-109, 43]]);
>> line.projection = "EPSG:4326";
EPSG:4326
>> line.transform("epsg:26912")
<LineString [[553789.2618259685, 6384535.0424553305], [464166.5408325899...>
>> var poly = new GEOM.Polygon([[[-108.3, 53.1], [-112.7, 47.1], [-109, 43.7], [-108.3, 53.1]]]);
>> poly.projection = "EPSG:4326";
EPSG:4326
>> poly.transform("epsg:26912");
<Polygon [[[680760.4370496429, 5886801.801175731], [370999.2216732587...>

scala> import org.geoscript.geometry._
scala> import org.geoscript.projection._
scala> import org.geoscript.GeoScript._

scala> val line = LineString((-110.1, 57.6), (-111.5, 50), (-109, 43)) in Projection("epsg:4326")
line: org.geoscript.geometry.LineString = LINESTRING (-110.1 57.6, -111.5 50, -109 43)

scala> val line2 = line in Projection("epsg:26912")
line2: org.geoscript.geometry.LineString = LINESTRING (553788.6739161084 6384534.487570734, 464165.9748020574 5538750.135212521, 663018.4534677222 4762755.4960556375)

scala> val poly = Polygon(LineString((-108.3, 53.1), (-112.7, 47.1), (-109, 43.7), (-108.3, 53.1)), Nil) in Projection("epsg:4326")
poly: org.geoscript.geometry.Polygon = POLYGON ((-108.3 53.1, -112.7 47.1, -109 43.7, -108.3 53.1))

scala> val poly2 = poly in Projection("epsg:26912")
poly2: org.geoscript.geometry.Polygon = POLYGON ((680759.8175153742 5886801.367604256, 370998.67923649476 5217678.697813773, 661154.8855028747 4840496.861362906, 680759.8175153742 5886801.367604256))

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

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

groovy:000> prj = new Projection('epsg:4326')
===> EPSG:4326

groovy:000> pt = new Point(-111, 45.7)
===> POINT (-111 45.7)

groovy:000> line = new LineString([-110.1,57.6], [-111.5,50], [-109,43])
===> LINESTRING (-110.1 57.6, -111.5 50, -109 43)

groovy:000> poly = new Polygon([-108.3,53.1],[-112.7,47.1],[-109,43.7],[-108.3,53.1])
===> POLYGON ((-108.3 53.1, -112.7 47.1, -109 43.7, -108.3 53.1))

groovy:000> prj.transform(pt, 'epsg:26912')
===> POINT (-412539.9935856778 -7830632.25817681)

groovy:000> prj.transform(line, 'epsg:26912')
===> LINESTRING (64971.64258713304 -7795528.649301183, -266610.029102562 -7718263.928822785, -418931.9422064803 -8078714.807026271)

groovy:000> prj.transform(poly, 'epsg:26912')
===> POLYGON ((-51461.2296841651 -8028678.665519956, -426754.7978043163 -7630837.138739225, -395538.4437005599 -8068093.241481589, -51461.2296841651 -8028678.665519956))