[OSM-dev] A few coastline related questions

[Preet]

On Mon, May 7, 2012 at 5:27 AM, Frederik Ramm <frederik at remote.org> wrote:
> On 05/07/2012 09:06 AM, Preet wrote:
>>
>> Hiya,
>>
>> I'm trying to extract coastline data from OSM... specifically, I want
>> shapefiles exactly like the ones that are available (processed_p and
>> shoreline_300), but
>> * in wgs84 (no projection to mercator)
>> * without splitting up of polys into tiles
>
>
> I've made this (very large) shapefile which has these properties with
> Jochen's osmcoastline tool:
>
> http://www.remote.org/frederik/tmp/nontiledland.zip
>
> (Temporary link; if you read this email in an archive later you are unlikely
> to find the file and you will have to build your own using Jochen's tool and
> a current planet extract.)

Awesome -- thank you!

> Bye
> Frederik
>
> --
> Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"
>
>
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I'd also like to briefly mention how I repaired the polygons I used
from NaturalEarthData. I know Jochen's tool and coastcheck do some
repairing as well, and they may be better suited (I'm not entirely
sure what they do under the hood), but there's this tool that I found
pretty handy available here: https://github.com/tudelft-gist/prepair.

It uses constrained triangulation to fix polygons so that they conform
to the common simple feature standard -- the paper can be found here:
http://www.gdmc.nl/ledoux/pdfs/_12agile.pdf. It may be of some use in
automating polygon repair for osm coastlines.

Regards,

Preet