braindump
Differences
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braindump [2017/02/08 17:02] – [Prominence] allchin09 | braindump [2018/10/08 23:26] – [Web Mercator (EPSG:3857/EPSG:900913)] allchin09 | ||
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* Work is going to be done (timeframe not specified) on " | * Work is going to be done (timeframe not specified) on " | ||
* Many errors in the listed coordinates are due to the location being recorded in lat/long to the nearest minute but in the top left corner of the grid square, as opposed to the bottom left as convention dictates. | * Many errors in the listed coordinates are due to the location being recorded in lat/long to the nearest minute but in the top left corner of the grid square, as opposed to the bottom left as convention dictates. | ||
+ | |||
+ | * AA spoke with staff member from GNB on the matter (Apr 2018): | ||
+ | * Acknowledged the issue and the plans for a project to address it | ||
+ | * No funding available in the current political climate | ||
====== Licensing ====== | ====== Licensing ====== | ||
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==== AGD66 ==== | ==== AGD66 ==== | ||
- | The datum used on topographic maps before GDA94. 2nd Edition topographic maps use the AMG66 projection which is derived from AGD66. | + | The datum used on topographic maps before GDA94. |
==== Australian National Grid (ANG) ==== | ==== Australian National Grid (ANG) ==== | ||
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===== Web Mercator (EPSG: | ===== Web Mercator (EPSG: | ||
- | Used in many popular web mapping applications (Google/ | + | Used in many popular web mapping applications (Google/ |
+ | |||
+ | For details on the issues using Web Mercator for geospatial applications, | ||
+ | Web Mercator Map Projection]] | ||
===== Universal Transverse Mecator (UTM) ===== | ===== Universal Transverse Mecator (UTM) ===== | ||
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^Parameter | ^Parameter | ||
- | ^Major Semi Axis | 6378293.645 | + | ^Major Semi Axis (m) |
^Inverse Flattening | ^Inverse Flattening | ||
^Used in | ANG | AGD, AMG | GDA, MGA | GPS | | ^Used in | ANG | AGD, AMG | GDA, MGA | GPS | |
braindump.txt · Last modified: 2021/03/07 22:06 by allchin09