[postgis-users] Extending Linestrings

[Leticia]

Hi community,

 

I need to "extend" a linestring in another one. The new linestring must be
obtained such as their new extremes are the intersection of it with a
polygon that contains it. The original linestring is composed of only a
linear segment.

 

Is there a simple method to do this?

 

 

-------------

|           |

      |     |    |

      |     |    |

      |           |

-------------

 

 

I need the other one:

 

 

-------|-----

|     |    |

      |     |    |

      |     |    |

      |     |    |

-------|-----

 

The original linestring is not always vertical u horizontal.

 

 

Thanks in advance,

Leticia

 

 

 

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