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braindump [2018/10/09 02:42] – [Privatisation of LPI] allchin09braindump [2021/03/07 22:02] – [Topographic maps] allchin09
Line 64: Line 64:
 ===== Topographic maps ===== ===== Topographic maps =====
  
-  * 1:63360 (inch:mile)+  * 1:63360 (inch:mile)
     * 1st edition     * 1st edition
     * 2nd edition (not all were revised     * 2nd edition (not all were revised
     * Note that the maps don't cover the whole of the state, they are mostly focused towards the coast. Also, there are a few 'holes' (eg Burragorang) where maps towards the coast were not published. This information is based on an index map held in the SLNSW which indicates which maps are in their collection, and it is assumed that they hold all maps which were published.     * Note that the maps don't cover the whole of the state, they are mostly focused towards the coast. Also, there are a few 'holes' (eg Burragorang) where maps towards the coast were not published. This information is based on an index map held in the SLNSW which indicates which maps are in their collection, and it is assumed that they hold all maps which were published.
-  * 1:31680 (inch:mile)+  * 1:31680 (inch:mile)
   * 1:50000 Army/RASC   * 1:50000 Army/RASC
     * 1st edition (ANG)     * 1st edition (ANG)
Line 100: Line 100:
     * Elevation Data     * Elevation Data
       * [[http://www.ga.gov.au/elvis/|ELVIS - Elevation Information System]]       * [[http://www.ga.gov.au/elvis/|ELVIS - Elevation Information System]]
 +
 +====== Terminology ======
 +Well defined and consistant terminology goes a long way to assist in clear and well understood communication.
 +
 +Refer to the [[terminology]] page for further information.
  
 ====== Datums ====== ====== Datums ======
Line 147: Line 152:
 [[http://www.binaryearth.net/AusDatumTool/AustralianNationalGrid.html]] [[http://www.binaryearth.net/AusDatumTool/AustralianNationalGrid.html]]
  
-The ANG makes use of the Clarke 1858 spheroid.+The ANG makes use of the Clarke 1858 spheroid, where the parameters are expressed in British feet for mainland Australia (and Clarkes feet for Tasmania).
 ===== Datum Conversions ===== ===== Datum Conversions =====
  
braindump.txt · Last modified: 2021/03/07 22:06 by allchin09

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