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#30DayMapChallenge

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#30DayMapChallenge 2024 Day 30: The Final Map
I've spent a lot of time playing with Relative Elevation Models (REM's) recently.
In floodplains, lidar digital elevation models (DEMs) can be converted to relative elevation models (REMs) to better visualize river features that are difficult to discern using an aerial photo or lower-resolution DEM.
This is my favorite - The Wilamette River between Corvallis and Salem Oregon. I used the IDW method detailed by Dan Coe Carto.

#30DayMapChallenge Day 27 - Micromapping

We were asked, "could you make a map of the main government campus?"

And we asked ourselves, as always, "can we do this with #OpenStreetMap data?"

We *could*, but we decided it would look better if we micromapped it first.

This isn't even all the data we added, but here's a lot of it. Highways as areas, parking spaces, solar panels, etc.

Those aren't trunks part of the tree symbol, those are individual shrubbery areas. 😎

Edit: labeled solar farm.

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Okay this is not a map, but has a medium-sized PostGIS query underneath.

Every Door operates on a one-step principle: you map and forget. But for notes, it is two steps: record, and map at home. Still, I forget nevertheless.

So I made a special web page for GeoScribbles, which lists, who mapped, where, and when. Meaning, I see all my notes grouped, and can mark whether I have processed them.

And indeed, I've already forgot about a walk I had a week ago. Time for JOSM!

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Given that Every Door does not upload changes automatically, they can lay in its database for weeks. But don't worry of conflicts: just before uploading, it downloads fresh versions of all modified objects, and does a three-way merge for those that have changed. So no tag changes will be lost, and no special panels for conflict resolution needed.

If some changes do fail to upload and get stuck, delete them from the settings → pending uploads panel.

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OSM is not a single thing, as its data model implies, but a mess of hundreds of layers. Some visible, some aren't. Some attract corporate interest, some cause community fights now and then. Some neglected.

With Every Door, I am targeting POI in OSM: previously so hard to maintain, mappers just tended to ignore them, or focus on a narrow subset.

Now I can finally trust search results in my city more than Google's or any of the open alternatives. And we're just starting!

#30DayMapChallenge

Day 24 - Circles

Decided to incorporate the 'circle' theme into my map too, so here are the locations of Scotland's stone circles.

The small circles around the coastline were the easiest thing to create thanks to #inkscape's Distribute along Path feature.