Use GetEnvelope() in Calculate Zonal Statistics

[Ariki]

Although the code in zonal_stats() is a good example of reading geometries, I believe using GetEnvelope() is a simpler way to get feature extent.

[ustroetz]

You are right. Though the recipe is kind of outdated anyway. Meanwhile Rasterstats showed up and is way better in calculating Zonal Statistics.

[Ariki]

Thank you for this suggestion, it seems to be a really powerful solution.