Martin Raifer tyrasd

Final GSoC 2022 project report

Geo-referenced image viewer

GSoC Project Idea

GSoC Project Proposal

GSoC Project Code

Linux

How to enable function keys

echo 0 | sudo tee /sys/module/hid_apple/parameters/fnmode

Interesting Links

https://blog.colinwaddell.com/keychron-function-keys-configuration/

Here is the best setup (I think so :D) for K-series Keychron keyboards on Linux.

Note: many newer Keychron keyboards use QMK as firmware and most tips here do not apply to them. Maybe the ones related to Bluetooth can be useful, but everything related to Apple's keyboard module (hid_apple) on Linux, won't work. As far as I know, all QMK-based boards use the hid_generic module instead. Examples of QMK-based boards are: Q, Q-Pro, V, K-Pro, etc.

Most of these commands have been tested on Ubuntu 20.04 and should also work on most Debian-based distributions. If a command happens not to work for you, take a look in the comment section.

Make Fn + F-keys work (NOT FOR QMK-BASED BOARDS)

Older Keychron keyboards (those not based on QMK) use the hid_apple driver on Linux, even in the Windows/Android mode, both in Bluetooth and Wired modes.

	a	auch, ein
	a bissl	ein bisschen
	a leig auf	haartracht betreffend
	a nettlä	ettliche, viele
	a posto	in Ordnung
	a Readl (Vinschg.)	eine kurze Zeit (Weile)
	a Schliafr	ein Anlehnungsbedürftiger
	a Soch ritzn	etwas erledigen
	aagnen	nadeln von fichten tannen usw.
	Aanaxa	kleiner Traktor mit einer Achse

Geojson.net

Geojson.net will be a replacement for geojson.io, the simple editor for map data. In most ways, it has the same intent, goals, limitations, and ideas of geojson.io - they're both projects of mine.

I created geojson.io as a side project in 2013, and it thrived for a few years, as it simply solved the problem of previewing, modifying, and creating map data. I think it benefited from simplicity and unity of thought: it wasn't a product, it didn't have overarching design goals or any sort of leadership. There was the core functionality, and a bunch of functionality that pretty neatly layered on top of that without making the whole thing too intimidating. I'm pretty happy with how it went.

Over the last two or so years, though, geojson.io hasn't changed much, and the web has. Which means that, in a few ways, it's just straight-up broken: GitHub integration is broken, it was never updated to accommodate for the deprecation of anonymous gists, and

Smooth transitioning US tour in the same vein as this example. Steps:

Compares both shapes and adds evenly-spaced points to whichever polygon has fewer so that both have the same number of points
Picks the winding of the first polygon that minimizes the sum of the squared distances between point pairs

Some possible improvements:

Adding additional points to both shapes first such that every segment longer than a certain distance is bisected
Tweaking the placement of added points with simulated annealing
Using a cost function that factors in self-intersections at the halfway mark in addition to distance traveled

Cruncher

install node/npm, curl
compile and install tippecanoe (version 1.8.1 works, not sure about newer releases)
download run.sh from cruncher repo and chmod +x it
replace osmqatiles-planet url with the extract you want
adjust paths in run.sh (and mkdir the respective working directories)
comment out hotprojects.sh (would fail because it requires valid AWS credentials to upload stuff into a hardcoded bucket).
comment out the forever restart … lines (requires a tile-serving script to be already running)
execute run.sh -> … -> two .mbtiles files in results directory

	#!/bin/bash
	URL=https://download.geofabrik.de/europe/germany/baden-wuerttemberg/karlsruhe-regbez-latest.osm.pbf
	RELATION_ID=62691
	RELATION_NAME=mannheim
	###

	echo "Downloading $URL"
	SOURCE=$(basename "$URL")
	curl $URL -o $SOURCE

	#!/usr/bin/env python3
	#
	# OSM node history to SQLite

	import osmium
	import sqlite3
	import sys


	SCHEMA_OBJECT = """

	/*
	EXAMPLE MESSAGE

	/poll "question?" "option 1" "option 2"
	*/

	/** Global Helpers
	*
	* console - A normal console instance
	* _ - An underscore instance