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ee.Geometry.MultiPoint.simplify
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Simplifies the geometry to within a given error margin. Note that this does not respect the error margin requested by the consumer of this algorithm, unless maxError is explicitly specified to be null.
This overrides the default Earth Engine policy for propagating error margins, so regardless of the geometry accuracy requested from the output, the inputs will be requested with the error margin specified in the arguments to this algorithm. This results in consistent rendering at all zoom levels of a rendered vector map, but at lower zoom levels (i.e. zoomed out), the geometry won't be simplified, which may harm performance.
| Usage | Returns | MultiPoint.simplify(maxError, proj) | Geometry |
| Argument | Type | Details | this: geometry | Geometry | The geometry to simplify. |
maxError | ErrorMargin | The maximum amount of error by which the result may differ from the input. |
proj | Projection, default: null | If specified, the result will be in this projection. Otherwise it will be in the same projection as the input. If the error margin is in projected units, the margin will be interpreted as units of this projection. |
Examples
Code Editor (JavaScript)
// Define a MultiPoint object.
var multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);
// Apply the simplify method to the MultiPoint object.
var multiPointSimplify = multiPoint.simplify({'maxError': 1});
// Print the result to the console.
print('multiPoint.simplify(...) =', multiPointSimplify);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPoint,
{'color': 'black'},
'Geometry [black]: multiPoint');
Map.addLayer(multiPointSimplify,
{'color': 'red'},
'Result [red]: multiPoint.simplify');
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 MultiPoint object.
multipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])
# Apply the simplify method to the MultiPoint object.
multipoint_simplify = multipoint.simplify(maxError=1)
# Print the result.
display('multipoint.simplify(...) =', multipoint_simplify)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint')
m.add_layer(
multipoint_simplify, {'color': 'red'}, 'Result [red]: multipoint.simplify'
)
m
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Last updated 2024-07-13 UTC.
[null,null,["Last updated 2024-07-13 UTC."],[[["\u003cp\u003eSimplifies the geometry to within a given error margin, potentially overriding the user's requested accuracy.\u003c/p\u003e\n"],["\u003cp\u003eInput geometries are requested with the specified error margin, ensuring consistent rendering across zoom levels.\u003c/p\u003e\n"],["\u003cp\u003eAt lower zoom levels, geometries may not be simplified, potentially impacting performance.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003esimplify\u003c/code\u003e method takes an optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e argument to control simplification and projection.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.MultiPoint.simplify\n\nSimplifies the geometry to within a given error margin. Note that this does not respect the error margin requested by the consumer of this algorithm, unless maxError is explicitly specified to be null.\n\n\u003cbr /\u003e\n\nThis overrides the default Earth Engine policy for propagating error margins, so regardless of the geometry accuracy requested from the output, the inputs will be requested with the error margin specified in the arguments to this algorithm. This results in consistent rendering at all zoom levels of a rendered vector map, but at lower zoom levels (i.e. zoomed out), the geometry won't be simplified, which may harm performance.\n\n| Usage | Returns |\n|-------------------------------------------|----------|\n| MultiPoint.simplify`(maxError, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|---------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry to simplify. |\n| `maxError` | ErrorMargin | The maximum amount of error by which the result may differ from the input. |\n| `proj` | Projection, default: null | If specified, the result will be in this projection. Otherwise it will be in the same projection as the input. If the error margin is in projected units, the margin will be interpreted as units of this projection. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a MultiPoint object.\nvar multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);\n\n// Apply the simplify method to the MultiPoint object.\nvar multiPointSimplify = multiPoint.simplify({'maxError': 1});\n\n// Print the result to the console.\nprint('multiPoint.simplify(...) =', multiPointSimplify);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiPoint,\n {'color': 'black'},\n 'Geometry [black]: multiPoint');\nMap.addLayer(multiPointSimplify,\n {'color': 'red'},\n 'Result [red]: multiPoint.simplify');\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 MultiPoint object.\nmultipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])\n\n# Apply the simplify method to the MultiPoint object.\nmultipoint_simplify = multipoint.simplify(maxError=1)\n\n# Print the result.\ndisplay('multipoint.simplify(...) =', multipoint_simplify)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint')\nm.add_layer(\n multipoint_simplify, {'color': 'red'}, 'Result [red]: multipoint.simplify'\n)\nm\n```"]]