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ee.Geometry.Rectangle.dissolve
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Returns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.
Usage | Returns | Rectangle.dissolve(maxError, proj) | Geometry |
Argument | Type | Details | this: geometry | Geometry | The geometry to union. |
maxError | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj | Projection, default: null | If specified, the union will be performed in this projection. Otherwise it will be performed in a spherical coordinate system. |
Examples
Code Editor (JavaScript)
// Define a Rectangle object.
var rectangle = ee.Geometry.Rectangle(-122.09, 37.42, -122.08, 37.43);
// Apply the dissolve method to the Rectangle object.
var rectangleDissolve = rectangle.dissolve({'maxError': 1});
// Print the result to the console.
print('rectangle.dissolve(...) =', rectangleDissolve);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(rectangle,
{'color': 'black'},
'Geometry [black]: rectangle');
Map.addLayer(rectangleDissolve,
{'color': 'red'},
'Result [red]: rectangle.dissolve');
Python setup
See the
Python Environment page for information on the Python API and using
geemap
for interactive development.
import ee
import geemap.core as geemap
Colab (Python)
# Define a Rectangle object.
rectangle = ee.Geometry.Rectangle(-122.09, 37.42, -122.08, 37.43)
# Apply the dissolve method to the Rectangle object.
rectangle_dissolve = rectangle.dissolve(maxError=1)
# Print the result.
display('rectangle.dissolve(...) =', rectangle_dissolve)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(rectangle, {'color': 'black'}, 'Geometry [black]: rectangle')
m.add_layer(
rectangle_dissolve, {'color': 'red'}, 'Result [red]: rectangle.dissolve'
)
m
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["\u003cp\u003e\u003ccode\u003edissolve()\u003c/code\u003e returns the geometric union of the input geometry, primarily useful for merging MultiGeometries into single geometries.\u003c/p\u003e\n"],["\u003cp\u003eIt accepts optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e parameters for controlling reprojection during the union process.\u003c/p\u003e\n"],["\u003cp\u003eWhen applied to single geometries like Rectangles, \u003ccode\u003edissolve()\u003c/code\u003e typically returns the original geometry unchanged.\u003c/p\u003e\n"],["\u003cp\u003eThis method is valuable for simplifying complex geometries by combining their constituent parts.\u003c/p\u003e\n"]]],["The `dissolve` method unions geometries, leaving single geometries unchanged and operating on multi-geometries. It requires a geometry as input and returns a new geometry. Optional arguments include `maxError`, which sets the tolerated reprojection error, and `proj`, which defines the projection for the union operation. The examples demonstrate dissolving a rectangle in JavaScript and Python, showcasing how to apply the method, display results, and utilize optional parameters.\n"],null,["# ee.Geometry.Rectangle.dissolve\n\nReturns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------|----------|\n| Rectangle.dissolve`(`*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|--------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry to union. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | If specified, the union will be performed in this projection. Otherwise it will be performed in a spherical coordinate system. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a Rectangle object.\nvar rectangle = ee.Geometry.Rectangle(-122.09, 37.42, -122.08, 37.43);\n\n// Apply the dissolve method to the Rectangle object.\nvar rectangleDissolve = rectangle.dissolve({'maxError': 1});\n\n// Print the result to the console.\nprint('rectangle.dissolve(...) =', rectangleDissolve);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(rectangle,\n {'color': 'black'},\n 'Geometry [black]: rectangle');\nMap.addLayer(rectangleDissolve,\n {'color': 'red'},\n 'Result [red]: rectangle.dissolve');\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 Rectangle object.\nrectangle = ee.Geometry.Rectangle(-122.09, 37.42, -122.08, 37.43)\n\n# Apply the dissolve method to the Rectangle object.\nrectangle_dissolve = rectangle.dissolve(maxError=1)\n\n# Print the result.\ndisplay('rectangle.dissolve(...) =', rectangle_dissolve)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(rectangle, {'color': 'black'}, 'Geometry [black]: rectangle')\nm.add_layer(\n rectangle_dissolve, {'color': 'red'}, 'Result [red]: rectangle.dissolve'\n)\nm\n```"]]