0 ▁The ▁U . S . ▁government ▁has ▁released ▁the ▁data ▁into ▁public ▁domain , ▁with ▁the ▁following ▁conditions ▁im posed ▁( quot ation ▁from ▁V MAP 0 ▁Copy right ▁Stat ement ): ▁ ▁The ▁V MAP 0 ▁download ▁page ▁states : ▁ ▁However , ▁all ▁is ▁not ▁quite ▁what ▁it ▁seems . ▁There ▁is ▁a ▁' read me 1 . txt ' ▁file ▁located ▁in ▁the ▁v 0 eur , ▁v 0 s as , ▁and ▁v 0 so a ▁directories . ▁This ▁file ▁contains ▁information ▁saying ▁that ▁layers : ▁B ound aries ▁Cover age ▁and ▁the ▁Reference ▁Library , ▁are ▁copy right ed ▁to ▁the ▁Environment al ▁Systems ▁Research ▁Institute . ▁ ▁If ▁these ▁copy right ed ▁layers ▁are ▁not ▁used ▁there ▁is ▁no ▁viol ation ▁of ▁any ▁copy right s . ▁ ▁Tools ▁to ▁read ▁and ▁convert ▁V MAP ▁data ▁V PF View ▁( V 2 . 1 ) ▁- ▁developed ▁by ▁N IMA , ▁is ▁available ▁from ▁N GA ▁or ▁US GS ▁( as ▁part ▁of ▁the ▁N IMA M USE ▁package ); ▁this ▁tool ▁can ▁render ▁simple ▁plots ▁and ▁export ▁G IS ▁data ▁to ▁other ▁G IS ▁file ▁formats ▁ ▁" O GR ▁with ▁O G DI ▁driver ": ▁this ▁free ▁software ▁tool ▁can ▁convert ▁V MAP ▁format ▁to ▁standard ▁G IS ▁file ▁formats ▁such ▁as ▁SH AP E , ▁Post G IS ▁etc . ▁ ▁History ▁▁ 1 9 9 1 - 1 9 9 3 : ▁The ▁National ▁Im ag ery ▁and ▁M apping ▁Agency ▁(