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Filtering aFeatureCollectionis analogous to filtering anImageCollection. (See theFiltering an
ImageCollection section). There are thefeatureCollection.filterDate(),
andfeatureCollection.filterBounds()convenience methods and thefeatureCollection.filter()method for use with any applicableee.Filter. For example:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-06-03 UTC."],[[["\u003cp\u003eFiltering \u003ccode\u003eFeatureCollection\u003c/code\u003e objects is similar to filtering \u003ccode\u003eImageCollection\u003c/code\u003e objects and can be done using methods like \u003ccode\u003efilterDate()\u003c/code\u003e, \u003ccode\u003efilterBounds()\u003c/code\u003e, and \u003ccode\u003efilter()\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003efilter()\u003c/code\u003e method accepts an \u003ccode\u003eee.Filter\u003c/code\u003e object, allowing for flexible filtering based on various criteria.\u003c/p\u003e\n"],["\u003cp\u003eThe provided examples demonstrate how to filter a dataset of watersheds based on location and size using the \u003ccode\u003efilterBounds()\u003c/code\u003e and \u003ccode\u003efilter()\u003c/code\u003e methods respectively.\u003c/p\u003e\n"],["\u003cp\u003eCode snippets in JavaScript and Python (using \u003ccode\u003egeemap\u003c/code\u003e and Colab) illustrate the implementation of the filtering process.\u003c/p\u003e\n"]]],[],null,["# Filtering a FeatureCollection\n\nFiltering a `FeatureCollection` is analogous to filtering an\n`ImageCollection`. (See the [Filtering an\nImageCollection section](/earth-engine/guides/ic_filtering)). There are the `featureCollection.filterDate()`,\nand `featureCollection.filterBounds()` convenience methods and the\n`featureCollection.filter()` method for use with any applicable\n`ee.Filter`. For example:\n\n### Code Editor (JavaScript)\n\n```javascript\n// Load watersheds from a data table.\nvar sheds = ee.FeatureCollection('USGS/WBD/2017/HUC06')\n // Convert 'areasqkm' property from string to number.\n .map(function(feature){\n var num = ee.Number.parse(feature.get('areasqkm'));\n return feature.set('areasqkm', num);\n });\n\n// Define a region roughly covering the continental US.\nvar continentalUS = ee.Geometry.Rectangle(-127.18, 19.39, -62.75, 51.29);\n\n// Filter the table geographically: only watersheds in the continental US.\nvar filtered = sheds.filterBounds(continentalUS);\n\n// Check the number of watersheds after filtering for location.\nprint('Count after filter:', filtered.size());\n\n// Filter to get only larger continental US watersheds.\nvar largeSheds = filtered.filter(ee.Filter.gt('areasqkm', 25000));\n\n// Check the number of watersheds after filtering for size and location.\nprint('Count after filtering by size:', largeSheds.size());\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# Load watersheds from a data table.\nsheds = (\n ee.FeatureCollection('USGS/WBD/2017/HUC06')\n # Convert 'areasqkm' property from string to number.\n .map(\n lambda feature: feature.set(\n 'areasqkm', ee.Number.parse(feature.get('areasqkm'))\n )\n )\n)\n\n# Define a region roughly covering the continental US.\ncontinental_us = ee.Geometry.Rectangle(-127.18, 19.39, -62.75, 51.29)\n\n# Filter the table geographically: only watersheds in the continental US.\nfiltered = sheds.filterBounds(continental_us)\n\n# Check the number of watersheds after filtering for location.\ndisplay('Count after filter:', filtered.size())\n\n# Filter to get only larger continental US watersheds.\nlarge_sheds = filtered.filter(ee.Filter.gt('areasqkm', 25000))\n\n# Check the number of watersheds after filtering for size and location.\ndisplay('Count after filtering by size:', large_sheds.size())\n```"]]
