공지사항:
2025년 4월 15일 전에 Earth Engine 사용을 위해 등록된 모든 비상업용 프로젝트는 Earth Engine 액세스를 유지하기 위해
비상업용 자격 요건을 인증해야 합니다.
ee.Geometry.MultiPolygon.convexHull
컬렉션을 사용해 정리하기
내 환경설정을 기준으로 콘텐츠를 저장하고 분류하세요.
주어진 도형의 볼록 Hull을 반환합니다. 단일 점의 볼록 Hull은 점 자체이고, 공선점의 볼록 Hull은 선이며, 그 외 모든 점의 볼록 Hull은 다각형입니다. 모든 꼭짓점이 동일한 선에 있는 퇴화된 다각형은 선분으로 표시됩니다.
사용 | 반환 값 |
---|
MultiPolygon.convexHull(maxError, proj) | 도형 |
인수 | 유형 | 세부정보 |
---|
다음과 같은 경우: geometry | 도형 | 이 도형의 컨벡스 헐을 계산합니다. |
maxError | ErrorMargin, 기본값: null | 필요한 재투영을 실행할 때 허용되는 최대 오류량입니다. |
proj | 예상, 기본값: null | 작업을 실행할 프로젝션입니다. 지정하지 않으면 작업이 구면 좌표계에서 실행되며 선형 거리는 구의 미터 단위입니다. |
예
코드 편집기 (JavaScript)
// Define a MultiPolygon object.
var multiPolygon = ee.Geometry.MultiPolygon(
[[[[-122.092, 37.424],
[-122.086, 37.418],
[-122.079, 37.425],
[-122.085, 37.423]]],
[[[-122.081, 37.417],
[-122.086, 37.421],
[-122.089, 37.416]]]]);
// Apply the convexHull method to the MultiPolygon object.
var multiPolygonConvexHull = multiPolygon.convexHull({'maxError': 1});
// Print the result to the console.
print('multiPolygon.convexHull(...) =', multiPolygonConvexHull);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPolygon,
{'color': 'black'},
'Geometry [black]: multiPolygon');
Map.addLayer(multiPolygonConvexHull,
{'color': 'red'},
'Result [red]: multiPolygon.convexHull');
Python 설정
Python API 및 geemap
를 사용한 대화형 개발에 관한 자세한 내용은
Python 환경 페이지를 참고하세요.
import ee
import geemap.core as geemap
Colab (Python)
# Define a MultiPolygon object.
multipolygon = ee.Geometry.MultiPolygon([
[[
[-122.092, 37.424],
[-122.086, 37.418],
[-122.079, 37.425],
[-122.085, 37.423],
]],
[[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],
])
# Apply the convexHull method to the MultiPolygon object.
multipolygon_convex_hull = multipolygon.convexHull(maxError=1)
# Print the result.
display('multipolygon.convexHull(...) =', multipolygon_convex_hull)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'
)
m.add_layer(
multipolygon_convex_hull,
{'color': 'red'},
'Result [red]: multipolygon.convexHull',
)
m
달리 명시되지 않는 한 이 페이지의 콘텐츠에는 Creative Commons Attribution 4.0 라이선스에 따라 라이선스가 부여되며, 코드 샘플에는 Apache 2.0 라이선스에 따라 라이선스가 부여됩니다. 자세한 내용은 Google Developers 사이트 정책을 참조하세요. 자바는 Oracle 및/또는 Oracle 계열사의 등록 상표입니다.
최종 업데이트: 2025-07-26(UTC)
[null,null,["최종 업데이트: 2025-07-26(UTC)"],[[["\u003cp\u003eReturns the convex hull of a given geometry, which can be a point, line, or polygon.\u003c/p\u003e\n"],["\u003cp\u003eAccepts an optional \u003ccode\u003emaxError\u003c/code\u003e parameter for reprojection tolerance and an optional \u003ccode\u003eproj\u003c/code\u003e parameter to specify the projection for the operation.\u003c/p\u003e\n"],["\u003cp\u003eIf a projection is not specified, the operation is performed in a spherical coordinate system using meters as the unit for linear distances.\u003c/p\u003e\n"],["\u003cp\u003eThe convex hull of collinear points is a line segment, while the convex hull of a single point is the point itself.\u003c/p\u003e\n"],["\u003cp\u003eFor all other cases, the result is a polygon, which might be degenerate if all vertices lie on the same line.\u003c/p\u003e\n"]]],["The `convexHull` method calculates the convex hull of a given geometry. A single point's convex hull is the point itself; collinear points result in a line; otherwise, a polygon is produced. The method accepts `maxError` for reprojection tolerance and `proj` to define the projection. It can be applied to geometries, such as a `MultiPolygon`, returning a new `Geometry` representing the convex hull. The example provides code in both Javascript and Python that defines and displays the input `MultiPolygon` and the result of the convex hull.\n"],null,["# ee.Geometry.MultiPolygon.convexHull\n\nReturns the convex hull of the given geometry. The convex hull of a single point is the point itself, the convex hull of collinear points is a line, and the convex hull of everything else is a polygon. Note that a degenerate polygon with all vertices on the same line will result in a line segment.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------------|----------|\n| MultiPolygon.convexHull`(`*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | Calculates the convex hull of this geometry. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | The projection in which to perform the operation. If not specified, the operation will be performed in a spherical coordinate system, and linear distances will be in meters on the sphere. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a MultiPolygon object.\nvar multiPolygon = ee.Geometry.MultiPolygon(\n [[[[-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423]]],\n [[[-122.081, 37.417],\n [-122.086, 37.421],\n [-122.089, 37.416]]]]);\n\n// Apply the convexHull method to the MultiPolygon object.\nvar multiPolygonConvexHull = multiPolygon.convexHull({'maxError': 1});\n\n// Print the result to the console.\nprint('multiPolygon.convexHull(...) =', multiPolygonConvexHull);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiPolygon,\n {'color': 'black'},\n 'Geometry [black]: multiPolygon');\nMap.addLayer(multiPolygonConvexHull,\n {'color': 'red'},\n 'Result [red]: multiPolygon.convexHull');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Define a MultiPolygon object.\nmultipolygon = ee.Geometry.MultiPolygon([\n [[\n [-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423],\n ]],\n [[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],\n])\n\n# Apply the convexHull method to the MultiPolygon object.\nmultipolygon_convex_hull = multipolygon.convexHull(maxError=1)\n\n# Print the result.\ndisplay('multipolygon.convexHull(...) =', multipolygon_convex_hull)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'\n)\nm.add_layer(\n multipolygon_convex_hull,\n {'color': 'red'},\n 'Result [red]: multipolygon.convexHull',\n)\nm\n```"]]