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Hi, Thanks for providing this information. I guess it may because that the [lat, lon] array has the same size of 1KM data, when input [north, south, east, west] parameters, they were transferred to pixel locations which is related to the 1KM-image array. Then, if using this pixel locations to subset...

When processing MODIS using l2gen, the subset process works well on coordinates (north, south, east, west) with resolution=1000. However, when setting resolution=500 or 250, the subset results shifted and scaled. I supposed the algorithm transferred the (north, south, east, west) to pixel coordinate...