LANDSAT 7 Scanline Error Correction | How to Fix Scan Line Error using QGIS скачать в хорошем качестве

LANDSAT 7 Scanline Error Correction | How to Fix Scan Line Error using QGIS

How to Fill Scan Line Error using QGIS A "scanline error" typically refers to a specific type of data quality issue that can occur in Landsat 7 ETM+ satellite imagery. It's caused by a failure of the Scan Line Corrector (SLC) onboard the satellite, resulting in missing or distorted data in specific scanlines (horizontal lines of pixels). This results in a noticeable pattern of missing or duplicated data across the image. Using the "Fill NoData" Tool (Easiest) 1. Open QGIS and load your Landsat image (e.g., LT04_L2SP_188057_19910107_20200915_02_T1_B4.TIF). 2. Go to Processing Toolbox → Search for Fill NoData. 3. Double-click Fill NoData (GDAL) to open the tool. 4. Select your raster band in the Input Layer. 5. Set Maximum Distance (e.g., 10-20 pixels) – This controls how far QGIS interpolates. 6. Choose an Interpolation Algorithm: • Nearest Neighbor (fastest) • Bilinear or Cubic (smoother) 7. Click Run. This will generate a new raster with filled gaps.