Hi @daveluo_gfdrr, Hi @emily, Hi all,
I am wondering how to transform the lat/long coordinates of a specific building polygon into pixel coordinates relative to the top left corner of a tiled window.
Ali
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Hi,
This gets into how affine transformation matrices are used to convert between points in a Coordinate Reference System to a display of pixels and vice versa. Here’s some background reading that should help:
https://rasterio.readthedocs.io/en/latest/quickstart.html#dataset-georeferencing
https://shapely.readthedocs.io/en/latest/manual.html#affine-transformations
I’ve also updated the STAC data intro tutorial with a bonus section demo’ing how this works with the example chip: https://nbviewer.jupyter.org/gist/daveluo/57ada6ba61ff7c947aad8d6aaeeeb9e4#Bonus-material-on-saving-chipped-images-and-labels-as-geotiffs
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