Raster Layer Styling

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Raster Layer Styling

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How to Style Raster Layers

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Access Styling Panel

1. Right-click on a raster layer in the layers panel
2. Select “Layer Styles” from the context menu
3. Styling panel opens with all raster customization options

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Available Styling Sections

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General Section

• Type: Choose visualization method (Single channel, RGB channels, Hillshade)
• Band Selection: Select which bands to display
• Range: Set data range for each band

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Raster Section

• Color: Choose color map or palette
• Opacity: Adjust layer transparency (0-100%)
• Position: Control layer stacking order
• Resample: Select resampling method for zoom levels

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Legend Section

• Contents: Set value range displayed in legend
• Caption: Add descriptive text for the layer

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Popups Section

• Show: Configure when popup information appears

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Info Section

• File type: Shows raster format (e.g., Cloud Optimized GeoTIFF)
• File name: Display file name
• CRS: Show coordinate reference system

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Visualization Types

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Single Channel

• Display one band at a time
• Choose band: Select b1, b2, b3, etc.
• Set range: Adjust min/max values for the selected band
• Apply color map: Use different color schemes

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RGB Channels

• Display three bands as red, green, and blue
• Band Red: Select which band appears as red
• Band Green: Select which band appears as green
• Band Blue: Select which band appears as blue
• Individual ranges: Set min/max for each color channel

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Composite Band (NDVI, etc.)

• Mathematical combinations of bands
• NDVI: Normalized Difference Vegetation Index
• Other indices: EVI, NDBI, and more
• Custom formulas: Create your own band combinations

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Band Range Adjustment

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Adjust Min/Max Values

1. Select a band in the General section
2. View histogram showing data distribution
3. Drag sliders to set new min/max values
4. See real-time updates on the map

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Range Options

• Window: Adjust range based on current map view
• Entire Layer: Use full data range across the entire dataset
• Manual: Set custom min/max values

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Histogram Display

• Data distribution: See how values are spread
• Peak identification: Find concentration of values
• Outlier detection: Identify extreme values

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Color Map Selection

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Available Color Maps

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Basic

• None: Grayscale gradient (black to white)
• Simple: Basic color schemes

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Perceptually Uniform

• Blues: Blue gradient for water, elevation
• Greens: Green gradient for vegetation
• Oranges: Orange gradient for temperature
• Purples: Purple gradient for specialized data
• Reds: Red gradient for intensity, heat

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Specialized

• Rainbow: Full spectrum for complex data
• Viridis: Colorblind-friendly gradient
• Plasma: High-contrast gradient
• Inferno: Dark-to-light gradient

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Color Map Application

• Single channel mode: Apply to individual bands
• Real-time preview: See changes immediately
• Data-appropriate: Choose based on data type and purpose

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Auto-Save Feature

• Settings persist when you close and reopen the map
• No manual saving required
• Consistent appearance across sessions
• Team collaboration benefits from saved settings

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Best Practices

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Choose Appropriate Visualization

• Single channel: For individual band analysis
• RGB: For natural color or false color composites
• Composite: For derived indices and calculations

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Set Optimal Ranges

• Use histogram to understand data distribution
• Avoid extreme values that hide important patterns
• Consider data type when setting ranges

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Select Suitable Color Maps

• Grayscale: For general data visualization
• Sequential colors: For continuous data (elevation, temperature)
• Diverging colors: For data with meaningful center point
• Colorblind-friendly: For accessibility

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Next Steps

• Add More Raster Layers: Combine multiple raster datasets
• Create Composites: Build custom band combinations
• Publish Your Map: Share your styled raster layers