Google Earth Engine Export Format

The Google Earth Engine exporter creates JavaScript code snippets for use in the GEE Code Editor.

Format Details

Property	Value
Identifier	gee
Extension	.js
Use case	Google Earth Engine Code Editor

Output Formats

Default Mode

The default output is a JavaScript object with palette and visualization parameters:

var palettize_viz = {
  min: 0,
  max: 255,
  palette: ['440154', '482878', '3e4989', '31688e', '26828e', '1f9e89', '35b779', '6ece58', 'b5de2b', 'fde725']
};

SLD Mode

The SLD mode generates an SLD-style color map string:

var palettize_sld =
  '<RasterSymbolizer>' +
  '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#440154" quantity="0"/>' +
  '<ColorMapEntry color="#21918c" quantity="127.5"/>' +
  '<ColorMapEntry color="#fde725" quantity="255"/>' +
  '</ColorMap>' +
  '</RasterSymbolizer>';

CLI Usage

# Default mode (palette array)
palettize create viridis --format gee --output viz.js --domain 0,255

# SLD mode
palettize create viridis -f gee -o viz.js --domain 0,255 -O type=sld

# Custom number of colors
palettize create viridis -f gee -o viz.js --domain 0,255 --steps 10

Python Usage

from palettize import create_colormap, get_scaler_by_name, get_exporter

cmap = create_colormap(preset="viridis")
scaler = get_scaler_by_name("linear", domain_min=0, domain_max=255)
exporter = get_exporter("gee")

# Default mode
output = exporter.export(
    colormap=cmap,
    scaler=scaler,
    domain_min=0,
    domain_max=255,
    options={"num_colors": 10}
)

# SLD mode
sld_output = exporter.export(
    colormap=cmap,
    scaler=scaler,
    domain_min=0,
    domain_max=255,
    options={"type": "sld", "num_colors": 256}
)

Options

Option	Type	Default	Description
num_colors	int	256	Number of colors in palette
type	str	"default"	Output type: "default" or "sld"

Using in GEE Code Editor

Visualizing an Image

// Paste the exported visualization parameters
var palettize_viz = {
  min: 0,
  max: 255,
  palette: ['440154', '482878', '3e4989', '31688e', '26828e', '1f9e89', '35b779', '6ece58', 'b5de2b', 'fde725']
};

// Load your image
var image = ee.Image('USGS/SRTMGL1_003');

// Display with the colormap
Map.addLayer(image, palettize_viz, 'Elevation');

Using SLD Style

// Paste the exported SLD string
var palettize_sld =
  '<RasterSymbolizer>' +
  '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#440154" quantity="0"/>' +
  '<ColorMapEntry color="#21918c" quantity="127.5"/>' +
  '<ColorMapEntry color="#fde725" quantity="255"/>' +
  '</ColorMap>' +
  '</RasterSymbolizer>';

// Apply to image
var styled = image.sldStyle(palettize_sld);
Map.addLayer(styled, {}, 'Styled Elevation');

Classified Data

For categorical data, use exact color stops:

var landcover_viz = {
  min: 1,
  max: 5,
  palette: ['ff0000', '00ff00', '0000ff', 'ffff00', 'ff00ff']
};

var landcover = ee.Image('MODIS/006/MCD12Q1/2019_01_01')
  .select('LC_Type1');
Map.addLayer(landcover, landcover_viz, 'Land Cover');

Color Format

GEE expects hex colors without the # prefix:

• Standard hex: #440154
• GEE format: 440154

The exporter automatically strips the # prefix.

Tips

Choosing Number of Colors

• For continuous data: Use 256 colors for smooth gradients
• For display: 10-20 colors is often sufficient
• For SLD mode: More colors = larger string, slower rendering

Combining with Band Math

var ndvi = image.normalizedDifference(['B8', 'B4']);

var ndvi_viz = {
  min: -1,
  max: 1,
  palette: ['d73027', 'f46d43', 'fdae61', 'fee08b', 'd9ef8b', 'a6d96a', '66bd63', '1a9850']
};

Map.addLayer(ndvi, ndvi_viz, 'NDVI');

Export for Multiple Datasets

// Temperature colormap
var temp_viz = {min: -20, max: 40, palette: ['053061', '4393c3', 'f7f7f7', 'd6604d', '67001f']};

// Precipitation colormap
var precip_viz = {min: 0, max: 500, palette: ['f7fcb9', 'addd8e', '41ab5d', '006837']};