jiayuasu commented on issue #1047:
URL: https://github.com/apache/sedona/issues/1047#issuecomment-1751127432
@JimShady I wonder what exactly you mean for `geotiff` to `h3`?
With the new H3 functions added in Sedona, the following are now possible:
1. GeoTiff geo-envelope -> H3 cells
```
df1 = df.selectExpr("raster", "ST_H3CellIDs(RS_Envelope(raster) as h3)")
df2 = df1.select(col("raster"), explode(col("h3")).as("h3"))
```
2. Individual pixel location + corresponding observed band value -> H3 cells
+ values
```
df1 = df.selectExpr("ST_Point(RS_RasterToWorldCoordX(raster, colX, rowY),
RS_RasterToWorldCoordY(raster, raster, colX, rowY)) as pixelWorldCoord",
"RS_Value(raster, pixelWorldCoord) as observed_value")
```
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