# Microtasks for Waterway Mapping
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>🎶🎧🌊 I love to trace waterways, with headphones on. It brings me into a state of mind-less, relaxing trance, akin to Zen meditation. -- GOwin
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#### Transparency x OSM
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## #ChasingWaterways
Extend, enhance waterway networks
mpr.lt/browse/projects/61314
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#### Process Overview
* Get the data
* GIS: extract vertices, buffer and Bbox (as individual tasks)
* Host in your favorite micro-tasking manager
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### Get the data
Use Overpass or download from Geofabrik
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### Process data in GIS
Simplify lines, extract vertices, create BBoxes
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## Mapping tips
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## Using Topographic maps
e.g. OpenTopoMap or CyclOSM layers
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Contour lines "point" upstream when they cross a river of stream.
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A river (blue) and associated contour lines.
Image: [Physical Geology Lab](https://viva.pressbooks.pub/physicalgeologylab/chapter/topographic-features/).
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JOSM's Elevation plugin, as supplemental layer
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### #ChasingWaterways! :ocean:
mpr.lt/browse/projects/61314
:musical_score: hashtag inspired by TLC's song, Waterfalls
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## Q&A | Discussions
* Any feedback ?
* Have you done anything similar? Got tips to share, or how you'd prioritize tasks?
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:clapper:
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