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Map of all unsealed roads in New Zealand

Thanks to @jonibarteam for kicking off this project and @ray_taylor, @frotz, @simon_Kerr and @Isaac_Bain for jumping in and adding their expertise.

Huge thanks to @eric_yu for picking this up and getting it working on a new service after Google discontinued the Fusion Tables service the original map was hosted on.

The map below shows all ‘metal’ roads in NZ over 5km long.

By default the map only shows metal roads longer than 5km. To see all metal roads in New Zealand click “Map & Tool” then the “Layers and Legend” option in the upper-right corner and enable the “nz_metal_roads_all” layer.

If the map is too slow loading on this page, you can access the map directly here.

This map is based off data provided by Land Information New Zealand (LINZ), changes to a roads status since the LINZ data was last updated e.g roads being sealed or temporarily or permanently closed will not be reflected in the map below.

Home Forums TRACKS & GPS Map of every unsealed road in New Zealand

Viewing 15 posts - 16 through 30 (of 92 total)
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  • #9981
    Ray Taylor
    Participant
    Rank: 50cc Rider

    Here is an email I got from LINZ a few months ago when I was asking for a map of all the paper roads in the north island. I think this will provide most of the information that is needed – private driveways should not appear on the linz data as they are unrelated to property parcels.

    Hi Ray
    The data that we make available is on the LINZ Data Service https://data.linz.govt.nz. It is free , although you will need to signup and register to download data.
    One of the download formats is KML

    I suggest that you visit this page http://www.linz.govt.nz/data/linz-data-service/getting-started ensure that you know how to find data, download etc.
    Note that in the “Crop selection” there is the ability to use some predefined boundaries such as Territorial authorities.

    There are two datasets that might be of interest to you.
    1. Topographic roads from the Topo50maps – NZ Road Centrelines (Topo, 1:50k)
    2. Electoral roads from Landonline – NZ Road Centre Line (Electoral)
    It is really important that you read the metadata on what these layers contain. Generally the Topo roads are as mapped at at 1:50,000 scale. The Electoral roads are more of a label holder for roadnames, but they have a stronger relationship to the cadastre.

    Also note that the Road Parcels layer holds the cadastral parcels that were intended to become road (there would be a very small number that didn’t) these can be used in combination with the various road centrelines to identify “paper roads” (there is no specific identifier in the data that flags paper roads).

    Lastly, given that you’ve asked about “paper road” I suggest that you check out the walking Access commission http://www.wams.org.nz/. They have undertaken significant work to identify and maps this type of info

    Regards
    Andrew

    #9982
    frotz
    Participant
    Rank: 80cc Rider

    Thanks Ray. It looks like the WAMS data can be downloaded here:

    http://wams.org.nz/ArcGIS/rest/services/WEBSERVICE/WEBSERVICE_Public_Access_Areas/MapServer

    Also, here is a “data request” from September 2012 that says “if you would like a supply of the Public Access Areas data, please contact [email protected] and a timestamped copy can be supplied to you.”

    https://data.govt.nz/datasetrequest/show/114

    #9983
    Joao
    Keymaster
    • Bike: R1200GS
    Rank: 650cc Rider

    Hi Ray, unfortunately LINZ has no such information as a layer, for example if you look for Deacon RD in Riverhead forest it comes listed, without any info about public right of access…

    Cheers

    #9984
    Ray Taylor
    Participant
    Rank: 50cc Rider

    Boy thats a weird one.
    So first there is a Deacon Road which appears to be an urban road.

    Then there is Deacon Road which runs through what appears to be a forest which is privately owned by Rayonier.
    This does not appear on the WAMS.
    LINZ call it Long Bush Road
    It does appear as Deacon Road on google earth. Perhaps a road name change took place at some point in time when the council sold off the forrest or something like that.

    But anyhow, it doesnt appear on the WAMS maps or so its private.
    And another key indicator is if you look at the LINZ data type “Primary Road Parcels” it will show all public access.

    If you can get data in bulk from WAMS then that will be the most accurate though its based on LINZ data, overlaid on a topographic map.

    #9985
    Joao
    Keymaster
    • Bike: R1200GS
    Rank: 650cc Rider

    Hi Ray,

    Deacon Rd is just an example as I know it is within Riverhead forest and indeed private, however your tip about the Primary Road Parcels is a very good tip.


    @frotz
    I think we can work with this info.

    Cheers

    #9986
    frotz
    Participant
    Rank: 80cc Rider

    Is it possible to download a subset of the “Primary Road Parcels”? The KML is 84MB, and there’s a download limit of 40MB:

    https://data.linz.govt.nz/layer/796-nz-primary-road-parcels/

    I’ve made some progress on a Python script that can estimate road length from a LINZ KML file, so we can focus on “interesting” roads.

    #9987
    Ray Taylor
    Participant
    Rank: 50cc Rider

    In the top right of the scrren is a little crop icon next to the download button.
    You can crop an area and only download the content within that area.

    It might also be wise to look at a way to present this as a “Live” kml or kmz.
    Google earth can look at a kml file on your desktop, or it can look at an http address and a file hosted on a server.
    The maximum file size that google earth can look at is something like XXmb but the server can host a huge file and google earth only requests the data on screen at the time.
    I am not entirely sure how that works through.

    You can see how that concept works by looking at the geodetic placemarks.
    1) Right click my places in google earth > Add > Network Link
    2) Set the link to http://apps.linz.govt.nz/gdb/gdbkml.aspx?
    2) Refresh Tab > View Based Refresh > When: On Request

    Or you can use this link url to see all the DOC huts in NZ
    http://geoportal.doc.govt.nz/arcgis/services/GeoportalServices/DOC_Huts/MapServer/KmlServer?

    #9988
    Joao
    Keymaster
    • Bike: R1200GS
    Rank: 650cc Rider

    Interesting… that limit is new.

    I have the following files.

    NZ Road Centre lines 1:50 – 140MB
    NZ Track Centre lines 1:50 -99MB

    We will have to download 40MB sections for now, and generate 1 single file, I can do that.

    Here is the link for the South Island Metalled and Unmettaled roads NZ South Island Gravel Roads

    #9989
    Joao
    Keymaster
    • Bike: R1200GS
    Rank: 650cc Rider

    Ray, agree, once this is finished I think this should be hosted and downloaded by google earth instead of having massive kml files.
    We will have to find out how to have it running.

    #9990
    Ray Taylor
    Participant
    Rank: 50cc Rider

    I am happy to help there if I can once we find out what the requirements are.

    #9991
    Joao
    Keymaster
    • Bike: R1200GS
    Rank: 650cc Rider

    Cool thanks.
    Should not be much.

    #9992
    frotz
    Participant
    Rank: 80cc Rider

    Thanks Ray, cropping works around the download limit.

    However, the “Primary Road Parcels” KML doesn’t seem to have a “surface” data field for each road, so it doesn’t seem easy to filter out paved roads.

    #9993
    frotz
    Participant
    Rank: 80cc Rider

    The link I previously posted for the WAMS data doesn’t seem to lead to any usable data. This seems to be the official portal:

    https://walkingaccess.govt.nz/walkways-and-access/walking-access-mapping/gis-data/

    But it doesn’t seem to provide a bulk data download. It says:

    “The layer can be used as an ESRI map service:
    REST END POINT: http://wams.org.nz/ArcGIS/rest/services/WEBSERVICE”

    I think I’ll email them for a data dump. In the meantime it looks like I’ll have to update my ancient Mac to use newer Python libraries. Sigh. (Need lxml? Need MacPorts. Need Xcode. Need a newer OSX. Need to free up some disk space. Sigh.)

    #10009
    frotz
    Participant
    Rank: 80cc Rider

    Gale force winds in Wellington today, so it’s a good day for coding! I’ve written a Python script that can filter out roads in LINZ KML files (Here, if you’re interested). Currently it drops short roads, but it’s easy to extend it to do other things. Let me know if you have any ideas.

    Here are longest 10% of the unsealed roads in JoniBarTeam’s KML files:

    #10010
    Keith Fenwick
    Participant
    Rank: 400cc Rider

    Looks like an excellent little bit of information….looks like unsealed roads are fast disappearing

Viewing 15 posts - 16 through 30 (of 92 total)
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