# Description The tiles returned by raster api for a STAC item returns a mosaic if the item overlaps with other items. However, the preview returns the correct image. # Reproduction / Examples **Stack**: GHG prod stack **Collection**: `emit-ch4plume-v1` **Item**: `EMIT_L2B_CH4PLM_001_20240228T030250_002798` - [tile](https://earth.gov/ghgcenter/api/raster/collections/emit-ch4plume-v1/tiles/WebMercatorQuad/13/6250/3462@1x?item=EMIT_L2B_CH4PLM_001_20240228T030250_002798&assets=ch4-plume-emissions&bidx=1&colormap_name=plasma&rescale=1%2C1500&nodata=-9999) url: `https://earth.gov/ghgcenter/api/raster/collections/emit-ch4plume-v1/tiles/WebMercatorQuad/13/6250/3462@1x?item=EMIT_L2B_CH4PLM_001_20240228T030250_002798&assets=ch4-plume-emissions&bidx=1&colormap_name=plasma&rescale=1%2C1500&nodata=-9999` image:  - [preview]( https://earth.gov/ghgcenter/api/raster/collections/emit-ch4plume-v1/items/EMIT_L2B_CH4PLM_001_20240228T030250_002798/preview.png?bidx=1&assets=ch4-plume-emissions&rescale=1%2C1500&resampling=bilinear&colormap_name=plasma) url: `https://earth.gov/ghgcenter/api/raster/collections/emit-ch4plume-v1/items/EMIT_L2B_CH4PLM_001_20240228T030250_002798/preview.png?bidx=1&assets=ch4-plume-emissions&rescale=1%2C1500&resampling=bilinear&colormap_name=plasma` image:  # Expected behavior - [ ] Tiles should return only the image for the relevant item id, not the mosaic with overlapping items [Related issue in GHG](https://github.com/US-GHG-Center/custom-interfaces/issues/221)