When you work with downloaded Planet data in GIS platforms such as ArcGIS Pro and QGIS, different stretching methods applied to each layer can produce inconsistent visual representation across datasets. This can lead to:

• Visible seamlines between adjacent rasters.
• Differences in brightness, contrast, or color when layers are overlaid.

These issues are common when you download or process multiple raster datasets, such as mosaic quads or scenes, and display them together. They do not occur with visual assets.

Solution 1: merge the raster layers into a single raster

One way to remove seamlines and ensure consistent visual representation across layers is to merge all rasters into a single, unified raster dataset.

Composite tool

Use the Composite tool when you order the data through the Planet Orders API.

ArcGIS Pro

• Use the Mosaic To New Raster tool to combine the raster layers into one.
• This tool blends the individual raster layers into a seamless mosaic. You can adjust the mosaic operator, such as blend or mean, to control how overlapping areas are handled.
• Set the no data value appropriately to avoid blank spots.

QGIS

• Use the Merge tool, found in the Raster menu, to combine all raster layers into one.
• The merged raster has a consistent appearance and can be processed further for color and contrast adjustments.
• If you have overlapping tiles, adjust the nodata value during the merge process.

Merging the layers creates a single, continuous raster layer that is easier to process and analyze as a whole.

Solution 2: unify the symbology across layers

If you do not want to merge your raster datasets but want them to appear consistent when displayed together, unify the symbology, or stretching, for each layer. The goal is to apply the same color ramp, brightness, contrast, and stretch methods to each raster.

ArcGIS Pro

• Right-click Apply Symbology From Layer in the Geoprocessing pane and select Batch.
• Set the input layer as the batch parameter and select it.
• Set the layer you want to copy the symbology from as the Symbology Layer.
• Set the other layers you want to apply the symbology to as the Input Layer and run the tool.

QGIS

• Right-click the layer you want to copy the symbology from.
• Select Styles, then Copy Style.
• Right-click the other layers and select Paste Style.

Unifying the symbology lets layers remain separate rather than merged, keeps visual consistency across layers without modifying the underlying data, and makes layers easier to compare while keeping their structure.

Replacement for: How to Fix Inconsistent Layer Appearance in GIS Platforms