3 gl@sdZddlZddlmZmZddlmZddlm Z ddl m Z m Z m Z mZmZmZddlmZmZmZmZmZmZmZddlmZmZdd lmZmZmZm Z dd l!m"Z"Gd d d e#Z$Gd dde$Z%Gddde$Z&Gddde$Z'Gddde$Z(GdddZ)dS)a The LayerMapping class provides a way to map the contents of OGR vector files (e.g. SHP files) to Geographic-enabled Django models. 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