Borehole data collection (current version)
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Product description:Introduction Available non-confidential borehole data are provided in |- delimited ACSII files by Geological Survey of Victoria (GSV). GSV is not the principal custodian for all data: Water and Catchments Group within Department of Energy, Environment and Climate Action (DEECA) is the custodian for groundwater borehole data (Water Act, 1989), but there remains significant data duplication between the GSV and groundwater borehole databases due to the duplication of the data in 1988 when the groundwater unit was moved from the GSV to the Rural Water Corporation (RWC) and subsequent changes by both agencies have not been synchronized. The data includes water borehole data, coal borehole data, heavy mineral sand exploration data, and exploration boreholes drilled by GSV. A program to progressively capture private mineral exploration borehole data has covered some parts of the state and is still in progress. Background Prior to 1980 borehole data was recorded by GSV on 1 inch:1 mile plans and hard-copy borehole records. This included data for water boreholes drilled by public and private sector, petroleum wells and some private-sector mineral exploration boreholes. In areas where drilling was of particularly high density, locations were recorded on these plans as a single point or as occurring within an outlined area. The parish was traditionally used as the primary classifier for numbering boreholes. Some minor anomalies exist where a borehole and parish boundary may be on one side of a road or the other, or where parish boundaries have been moved. In 1980 the location data was moved to 1:100,000 AMG plans. In the mid-1980s a program of electronic capture commenced. Borehole locations were digitised from the 1:100,000 plans with an accuracy of ±300m. For the areas of high borehole density where boreholes were plotted on a single point, often only the first ten and last ten were recorded in the database. Boreholes whose parish was known but exact location was unknown were also recorded, but do not have a location. Tenement data for the small number of private-sector mineral exploration boreholes captured prior to 2001 was lost in the migration from the original VAX database to the current Ingres corporate database. Location and lithological data have been provided by Geo-Eng and the old State Electricity Commission of Victoria. The capture of mineral exploration borehole data from open-file exploration reports commenced in 2001 and will progressively cover the state over a number of years. The data are being captured at an whatever accuracy the source allows, typically between 20 and 250 m. Assay data has been consistently captured. Other downhole data has not been consistently captured. In 2009/2010 the GSV borehole database underwent major renovation and updating, resulting in the attached database and files which are structured differently to the database releases from previous years. Licence CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Related products:
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