[talk-au] DCS/LPI NSW base map note of interest

[Little Maps]

Hi Bob, property boundaries are offset on NSW gov datasets (including the NSW base map) across central and western NSW. They’re usually accurate in towns but get worse the more remote you go, from my experience. This problem affects public land boundaries (national parks, state forests etc) in OSM that were imported or traced from the base map or other gov datasets. For example, reserve boundaries often cross over main roads, even when there’s an obvious road easement on imagery. I refined lots of state forest boundaries in central and western NSW in OSM a year or so ago, so they now align with roads and imagery a lot better on OSM than on the original gov datasets. My favorite problem was a state forest boundary that on sixmaps went through someone’s back yard and bisected their swimming pool :)  Most National parks and other reserves haven’t been re-aligned on OSM as far as I know. Cheers Ian

> On 6 Oct 2024, at 7:49 AM, Bob Cameron <bob3bob3 at skymesh.com.au> wrote:
> 
> 
> Had me confused for a while, which is nothing new!
>  
> Recently working with ID in Mallanganee and Deepwater NSW. The property boundary data there is more than just shifted, it's out of sync with the road line overlay. Same basic problem with sixmaps, so a core data problem.
> 
> Cheers
> 
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