[talk-au] Australia maritime boundaries - import plan

Lee Mason lee.mason at outlook.com.au
Mon Sep 3 13:21:36 UTC 2018


Hello all,

Here is my import plan in regards to the earlier discussion about maritime boundaries. Please feel free to ask any questions or make suggestions.

Click here to download the OSM data file with the pre-prepared data for import.<https://1drv.ms/u/s!AhNsZYj9KZ5gp8gbgMMDbw780UWFww>

Cheers
Lee

---IMPORT DATA---------

DATA SOURCE: DATA TO IMPORT

  1.  Seas and Submerged Lands Act 1973 - Australian Maritime Boundaries 2014a - Geodatabase<https://data.gov.au/dataset/seas-and-submerged-lands-act-1973-australian-maritime-boundaries-2014a-geodatabase>:

(1a) Australia exclusive economic zone
(1b) Australia contiguous zone
(1c) Australia territorial waters [already in OSM]


  1.  Coastal Waters (State/Territory Powers) Act 1980 - Australian Maritime Boundaries 2014a - Geodatabase<https://data.gov.au/dataset/coastal-waters-state-territory-powers-act-1980-australian-maritime-boundaries-2014a-geodatabase>:

(2a) Australia coastal waters limit

Any maritime boundaries for Australia’s Antarctic territory claim will not be imported.

There are two EEZs provided by Geoscience Australia:
“NOTE: Two versions of the Exclusive Economic Zone (EEZ) are supplied to account for the discrepancy between Seas and Submerged Lands Act 1973. The Proclamation under section 10B (26/07/1994), and unratified Treaty between the Government of Australia and the Government of the Republic of Indonesia, establishing an Exclusive Economic Zone Boundary and Certain Seabed Boundaries (Perth, 14 march 1997) [1997] ATNIF 9 - (not yet in force). Although the proclamation remains in force, for many matters the limit modified by the action of the treaty is the limit that should be applied. This is the default depiction of Australia's EEZ.”
http://services.ga.gov.au/gis/rest/services/SSLA_1973_AMB2014a/MapServer

The 1997 treaty amended EEZ limit has been selected for import because, as mentioned above, it is the default depiction of Australia’s EEZ.

LICENSE
Both sources are licensed under Creative Commons Attribution 4.0 International<http://creativecommons.org/licenses/by/4.0> from Geoscience Australia

WAIVER/ATTRIBUTION
Geoscience waiver<https://wiki.openstreetmap.org/wiki/File:GeoscienceAustralia_CCBY_Waiver_EmailAcceptance.pdf> and attribution<https://wiki.openstreetmap.org/wiki/Contributors#Geoscience_Australia>  (ODbL compliant).

OSM DATA FILE:
https://1drv.ms/u/s!AhNsZYj9KZ5gp8gbgMMDbw780UWFww (will keep link active for about a month or so)

IMPORT TYPE
One-time import, manual integration using JOSM.

---DATA PREPARATION---------

REDUCTION AND SIMPLIFICATION
Only the maritime boundaries mentioned above will be imported from the data sources.

Shapefiles have been simplified in QGIS (0.0001 simplification tolerance) to reduce the number of points, while maintaining good detail. Minimal or no distinguishable change in detail is observed at OSM zoom level 14<https://wiki.openstreetmap.org/wiki/Zoom_levels> and lower.

TAGGING AND RELATIONS
(1a)
-New relation in OSM:
alt_name=Australia (EEZ)
border_type=eez
boundary=maritime
maritime=yes
name=Australia (exclusive economic zone)
source:date=2017-06-24
source= Seas and Submerged Lands Act 1973 - Australian Maritime Boundaries 2014a, Perth Treaty 1997 amendment, Geoscience Australia.
type=boundary

(1b)
-New relation in OSM:
border_type=contiguous
boundary=maritime
maritime=yes
name=Australia (contiguous zone)
source:date=2017-06-24
source=Seas and Submerged Lands Act 1973 - Australian Maritime Boundaries 2014a, Geoscience Australia.
type=boundary

(1c)
-Will be integrated with the existing Australia relation<https://www.openstreetmap.org/relation/80500> in OSM. Only required for fixes to correct detail (such as around Lord Howe/Elizabeth reef). The following tags will be added on the maritime ways:
maritime=yes
description=Territorial sea boundary

The redundant tag (“note= generated from coastline+baseline segments”) will be removed from the ways when checked against this Geoscience data.

(2a)
-Will be integrated with existing state/territory<https://www.openstreetmap.org/relation/2316594#map=5/-21.885/138.568> relations. The most significant change will be that state/territory boundaries will be changed to match the coastal water limits instead of Australia’s territorial waters limit.
The following tags will be added on the maritime ways:
maritime=yes
description=Coastal waters boundary

CHANGESET TAG
When uploading, the following sources will be stated:
(1a,b,c) Seas and Submerged Lands Act 1973 - Australian Maritime Boundaries 2014a, Geoscience Australia. 2017-06-24.
(2a) Coastal Waters (State/Territory Powers) Act 1980 - Australian Maritime Boundaries 2014a, Geoscience Australia. 2017-06-24.


---DATA MERGE WORKFLOW---------
Working solo, will take several days or less due to lack of existing data and minimal conflation when importing.

WORKFLOW
*Download existing OSM boundaries with overpass API in JOSM for relevant areas.
*Merge data with existing boundaries in OSM/check for overlapping ways or relations that share the same boundary

CONFLATION
*No existing relations in OSM will be deleted
*Overlapping ways will be merged that share the same border (such as marine park boundaries)
*Australia’s territorial waters boundary (admin_level=2) where it differs from the import data, the import data will be used as precedence. (Notable modifications: Lord Howe/Mermaid Reef, Abroholos, Heard Island and McDonald Islands regions).

QA
1a,b,c and 2a will each be imported in separate changesets using my import account, RoundCircle<https://www.openstreetmap.org/user/RoundCircle>. After each import, all modified or altered boundaries will be downloaded and checked. If anything goes wrong I will use the JOSM reverter plugin, or alternatively I will post here (hopefully not necessary!).

The order of import will be:
1c (Australia territorial waters/country boundary)
2a (Coastal waters/state boundary)
1a (eez)
1b (contiguous)

Note: the eez and contiguous boundary use the country boundary as the inner.

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