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latitude of north and south boundaries of polygons

Question asked by helenak on May 10, 2012
Latest reply on May 15, 2012 by helenak
Hello,

I have some polygon shapefiels.
Each of them are composed of more than one polygon.

I would like to ask how to get
1. the latitude of the north boundary of the northmost polygon in each shapefiles. 
2. the latitude of the south boundary of the southmost polygon in each shapefiles.

Please kindly advise python code or function to acquire the information.

Thanks.

Elaine

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