resampling artifacts

[jdries]

There's a remaining issue with resampling using specific methods such as average or mode.
It will occur when loading from geotiff, or from already loaded geotiff, so via the Geotrellis based resampling code.

It is however not consistent for every spatial extent: in most cases there's no clear problem. I included a process graph and screenshot showing where it does occur.

The issue only became visible after fixing the actual overall resampling problem:
#303

{
  "process_graph": {
    "loadco1": {
      "arguments": {
        "bands": [
          "B02"
        ],
        "id": "TERRASCOPE_S2_TOC_V2",
        "spatial_extent": {
          "east": 4.204268039667885,
          "north": 51.50071325632862,
          "south": 51.39186405142706,
          "west": 3.8652134883323654
        },
        "temporal_extent": [
          "2024-09-21",
          "2024-09-22"
        ]
      },
      "process_id": "load_collection"
    },
    "resample1": {
      "arguments": {
        "data": {
          "from_node": "loadco1"
        },
        "method": "average",
        "resolution": 100
      },
      "process_id": "resample_spatial"
    },
    "savere1": {
      "arguments": {
        "data": {
          "from_node": "resample1"
        },
        "format": "GTIFF"
      },
      "process_id": "save_result",
      "result": true
    }
  }
}