Immediately after the filing of such petition, the clerk of the district court, with whom such petition is filed, or to whom it has been assigned, shall cause notice by publication, to be made of the pendency of the petition and of the time and place of the hearing thereon, and said notice as provided herein shall be given in each county affected by the district, and the time of hearing shall be not less than sixty (60) days from the date of the first publication. Said notice shall also include a map of the proposed district. Provided, that for any district created prior to the passage of this act in which notice of hearing petition was published in only one newspaper in a county affected by the district, such notice shall be deemed sufficient. The district court in which the petition was filed, or to whom it was assigned, shall thereafter, for all purposes of this act, except as hereinafter otherwise provided, maintain and have original and exclusive jurisdiction coextensive with the boundaries and limits of said district, and of lands and other property to be included in said district, or affected by said district, without regard to the usual or other limits of its jurisdiction and shall convene at the convenient county seat.