The visualization parameters. For Images and ImageCollection, see ee.data.getMapId for valid parameters. For Features and FeatureCollections, the only supported key is "color", as a CSS 3.0 color string or a hex string in "RRGGBB" format. Ignored when eeObject is a map ID.
name
String, optional
The name of the layer. Defaults to "Layer N".
shown
Boolean, optional
A flag indicating whether the layer should be on by default.
opacity
Number, optional
The layer's opacity represented as a number between 0 and 1. Defaults to 1.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-10-06 UTC."],[[["\u003cp\u003e\u003ccode\u003eMap.addLayer()\u003c/code\u003e overlays Earth Engine objects like images and features onto the map as a new layer.\u003c/p\u003e\n"],["\u003cp\u003eVisualization parameters can be customized using the \u003ccode\u003evisParams\u003c/code\u003e argument to control how the layer is displayed.\u003c/p\u003e\n"],["\u003cp\u003eThis function accepts Earth Engine objects (like Image, FeatureCollection, Geometry), visualization parameters, layer name, visibility, and opacity as arguments.\u003c/p\u003e\n"],["\u003cp\u003eThe function returns the added map layer as a \u003ccode\u003eui.Map.Layer\u003c/code\u003e object, which can be further manipulated.\u003c/p\u003e\n"],["\u003cp\u003ePre-styled images or those with inherent visualization can be added by setting \u003ccode\u003evisParams\u003c/code\u003e to null.\u003c/p\u003e\n"]]],["The `Map.addLayer` function adds an Earth Engine object to a map as a layer, returning the new `ui.Map.Layer`. It accepts an `eeObject` (Collection, Feature, Image, or RawMapId), optional `visParams` for visualization, `name` for the layer's label, `shown` (boolean) to set default visibility, and `opacity` (0-1). Visualization parameters vary by object type; `color` is the only supported parameter for Features, while Images support `bands`, `min`, `max`, and `palette`. ImageCollections are mosaicked, and the last images take precedence.\n"],null,["# Map.addLayer\n\n\u003cbr /\u003e\n\nAdds a given EE object to the map as a layer.\n\n\u003cbr /\u003e\n\nReturns the new map layer.\n\n| Usage | Returns |\n|------------------------------------------------------------------------------|--------------|\n| `Map.addLayer(eeObject, `*visParams* `, `*name* `, `*shown* `, `*opacity*`)` | ui.Map.Layer |\n\n| Argument | Type | Details |\n|-------------|------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `eeObject` | Collection\\|Feature\\|Image\\|RawMapId | The object to add to the map. |\n| `visParams` | FeatureVisualizationParameters\\|ImageVisualizationParameters, optional | The visualization parameters. For Images and ImageCollection, see ee.data.getMapId for valid parameters. For Features and FeatureCollections, the only supported key is \"color\", as a CSS 3.0 color string or a hex string in \"RRGGBB\" format. Ignored when eeObject is a map ID. |\n| `name` | String, optional | The name of the layer. Defaults to \"Layer N\". |\n| `shown` | Boolean, optional | A flag indicating whether the layer should be on by default. |\n| `opacity` | Number, optional | The layer's opacity represented as a number between 0 and 1. Defaults to 1. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// A Sentinel-2 surface reflectance image.\nvar image = ee.Image('COPERNICUS/S2_SR/20210109T185751_20210109T185931_T10SEG');\nMap.setCenter(-121.87, 37.44, 9);\n\n// Set multi-band RGB image visualization parameters. If the \"bands\" parameter\n// is not defined, the first three bands are used.\nvar rgbVis = {\n bands: ['B11', 'B8', 'B3'],\n min: 0,\n max: 3000\n};\nMap.addLayer(image, rgbVis, 'Multi-band RGB image');\n\n// Set band-specific \"min\" and \"max\" properties.\nvar rgbVisBandSpec = {\n bands: ['B11', 'B8', 'B3'],\n min: [0, 75, 150],\n max: [3500, 3000, 2500]\n};\nMap.addLayer(image, rgbVisBandSpec, 'Band-specific min/max');\n\n// If you don't specify \"min\" and \"max\" properties, they will be determined\n// from the data type range, often resulting in an ineffective color stretch.\nMap.addLayer(image.select('B8'), null, 'Default visParams');\n\n// If an image layer has already been styled, set \"visParams\" as null.\nvar imageRgb = image.visualize(rgbVis);\nMap.addLayer(imageRgb, null, 'Pre-styled image');\n\n// Use the \"palette\" parameter with single-band image inputs to define the\n// linear color gradient to stretch between the \"min\" and \"max\" values.\nvar singleBandVis = {\n min: 0,\n max: 3000,\n palette: ['blue', 'yellow', 'green']\n};\nMap.addLayer(image.select('B8'), singleBandVis, 'Single-band palette');\n\n// Images within ImageCollections are automatically mosaicked according to mask\n// status and image order. The last image in the collection takes priority,\n// invalid pixels are filled by valid pixels in preceding images.\nvar imageCol = ee.ImageCollection('COPERNICUS/S2_SR')\n .filterDate('2021-03-01', '2021-04-01');\nMap.addLayer(imageCol, rgbVis, 'ImageCollection mosaic');\n\n// FeatureCollection, Feature, and Geometry objects can be styled using the\n// \"color\" parameter.\nvar featureCol = ee.FeatureCollection('WCMC/WDPA/current/polygons');\nMap.addLayer(featureCol, {color: 'purple'}, 'FeatureCollection');\n```"]]
