reegnz

Implementing a jq REPL with fzf

Update: I created jq-zsh-plugin that does this.

One of my favourite tools of my trade is jq. It essentially enables you to process json streams with the same power that sed, awk and grep provide you with for editing line-based formats (csv, tsv, etc.).

Another one of my favourite tools is fzf.

raveenb

Connecting to an Android device over SSH

Initial Setup

Install Android App Termux from APKPure or AppStore. If the app exists, just delete and re-install it to get the latest version, The APK can be downloaded from https://apkpure.com/termux/com.termux/ Install the APK using by running

adb install ~/Downloads/Termux_v0.73_apkpure.com.apk

JamesChevalier

An area ID in Overpass is the OSM relation ID + 3600000000

This information is kind of buried in the Overpass API wiki page documenting the available filters: https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL#By_area_.28area.29

The OSM relation ID can be seen in two places:

• Visit https://www.openstreetmap.org and search for the city
• Click on its entry and you will be taken to a https://www.openstreetmap.org/relation/SOME_NUMBER_HERE page
• The relation ID is in the URL as "SOME_NUMBER_HERE" in the bullet point above
• The relation ID will also be in parentheses next to the city name in the left column

mdouchin

#Requires -RunAsAdministrator

<#
.Synopsis
   Download the OSGeo4W installer then download and install QGIS LTR (through the 'full' meta-package).
.DESCRIPTION
   This script will:
      1. change the current directory to the user downloads folder
      2. download the OSGeo4W installer
      3. launch it passing command-line parameters to DOWNLOAD packages required to QGIS LTR FULL

Guts

#Requires -RunAsAdministrator

<#
.Synopsis
   Download the OSGeo4W installer then download and install QGIS LTR (through the 'full' meta-package).
.DESCRIPTION
   This script will:
      1. change the current directory to the user downloads folder
      2. download the OSGeo4W installer
      3. launch it passing command-line parameters to DOWNLOAD packages required to QGIS LTR FULL

bzerangue

NDJSON is a convenient format for storing or streaming structured data that may be processed one record at a time.

• Each line is a valid JSON value
• Line separator is ‘\n’

1. Convert JSON to NDJSON?

cat test.json | jq -c '.[]' > testNDJSON.json

veltman

Making a big image zoomable

When you have a giant image and you want to make it easy to pan and zoom without downloading the whole 50MB image into someone's browser, a nice workaround is to cut that image into tiles at different zoom levels and view it as it were a map. An example where I've used this technique is The "Snowpiercer" Scenario.

One way to cut your big image into the requisite tiles is with gdal2tiles.py.

Alternatively, this Node script will do the cutting after you install node-canvas and mkdirp:

const fs = require("fs"),

chrisjsimpson

#!/env/python
# coding=utf8

"""
Converting Degrees, Minutes, Seconds formatted coordinate strings to decimal. 

Formula:
DEC = (DEG + (MIN * 1/60) + (SEC * 1/60 * 1/60))

Assumes S/W are negative. 

aborruso

#!/bin/bash

##
## Tested on: Ubuntu 18.04 & ECW 5.4 & GDAL 2.3.1
##

## Download the ERDAS ECW JP2 SDK v5.4 Linux
## https://download.hexagongeospatial.com/downloads/ecw/erdas-ecw-jp2-sdk-v5-4-linux

## Download GDAL v2.3 Source (ex. 2.3.1)

mrharel

const callerMap = {};

function getCaller(error) {
    if (error && error.stack) {
        const lines = error.stack.split('\n');
        if (lines.length > 2) {
            let match = lines[2].match(/at ([a-zA-Z\-_$.]+) (.*)/);
            if (match) {
                return {
                    name: match[1].replace(/^Proxy\./, ''),