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Get pixel data

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Tim Schaub
2022-02-06 16:46:01 -07:00
parent cd45663996
commit eb4d5e0784
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changelog/upgrade-notes.md
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## Upgrade notes
### Next
#### New `layer.getData()` method
Raster layers (static images, image tiles, data tiles) have a new `layer.getData(pixel)` method that returns the pixel data at the provided location. The return value depends on the underlying source data type. For example, a GeoTIFF may return a `Float32Array` with one value per band, while a PNG rendered from a tile layer will return a `Uint8ClampedArray` of RGBA values.
If you were previously using the `map.forEachLayerAtPixel()` method, you should use the new `layer.getData()` method instead. The old method returns composite pixel values from multiple layers and is limited to RGBA values. The new method doesn't suffer from these shortcomings and is more performant.
### v6.12.0
No special changes are required when upgrading to the 6.12.0 release.