On 08/06/2025 13:00, [email protected] wrote:
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Today's Topics:

    1. OT: Waterways in OpenStreetMap plotted by width. (Ralph Corderoy)


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Message: 1
Date: Sat, 07 Jun 2025 16:48:31 +0100
From: Ralph Corderoy<[email protected]>
To: Dorset Linux User Group<[email protected]>
Subject: [Dorset] OT: Waterways in OpenStreetMap plotted by width.
Message-ID:<[email protected]>
Content-Type: text/plain; charset=utf-8

Hi,

I thought this rendering of OSM map data might be of interest to some on
the list.  From its author:

     WaterwayMap.org is a map of waterways (rivers etc) from OpenStreetMap.
     Uniquely, it groups connected rivers together, colouring them
     the same, showing river networks.  It also calculates downstream
     flow, and can draw rivers with more flow wider, producing maps like
     traditional maps of rivers.  This allows the production of good maps,
     and the finding of errors in the data.  All of this is calculated
     automatically from 100% pure OSM data.  It also calculates some
     QA?maps, such as loops in rivers in OSM.

     https://waterwaymap.org/#map=10.03/50.8105/-1.7603

Fascinating. Who realised that the Humber had such a wide catchment area?

Graeme
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