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Johnnie Hård johnniehard

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@johnniehard
johnniehard / orientation.md
Last active July 28, 2018 20:48
Getting the orientation of the longest straight line distance across a polygon.

Some quick and dirty PostGIS:

Get the longest line for your polygons

create table test.tatortlongestline as
select st_longestline(t.geom, t.geom) as geom, t.tatort
from indata.tatort as t
where lanskod = '01';
@johnniehard
johnniehard / datastructure.json
Last active July 13, 2018 11:16
{
"location": { "lat": 0, "lng": 0 },
"data": [
{ "date": "2018-08-31", "cloudy_pct": 23, "B1": 3645, "B2 (etc...)": 4324, "NDVI": 0.4 },
{ "date": "2018-08-25", "cloudy_pct": 21, "B1": 3445, "B2 (etc...)": 4384, "NDVI": 0.3 },
"etc..."
]
}
@johnniehard
johnniehard / keybase.md
Created January 8, 2018 08:04

Keybase proof

I hereby claim:

  • I am iamlukesky on github.
  • I am iamlukesky (https://keybase.io/iamlukesky) on keybase.
  • I have a public key ASDzxKz0aNaCqsYzm34G3T7cShlOI8nRaDGTvaLyK_3p9Qo

To claim this, I am signing this object:

@johnniehard
johnniehard / Depth DEM
Last active November 27, 2017 14:19
Caclulating depth DEM in QGIS raster calculator.
(( "DEM" - zerolevel) * -1 ) * ((( "DEM" - zerolevel) * -1) > 0)
@johnniehard
johnniehard / shpfolder2geojson.sh
Created September 1, 2017 05:14
Converts all shapefiles in input directory to EPSG:4326 GeoJSON files inside of target directory
#!/bin/bash
# Johnnie Hård
# https://synvinkel.org
geojson=".geojson"
# These are set by calling the script with arguments e.g:
# ./shpfolder2geojson.sh MyShapefileDirectory MyGeojsonDirectory
inputdirectory=$1
@johnniehard
johnniehard / index.html
Created August 25, 2017 20:15
MvqyZR
<h1>Hello World!</h1>
lkjdfkjfd
@johnniehard
johnniehard / README.md
Last active August 13, 2017 20:14
Skapa, hosta och ta in mbtiles

Stegen jag tog, hade inget vidare syfta än att få upp ett fungerande exempel.

  1. Ladda ner vägkartan stockholm från lantmäteriets öppna data ftp (vem fan har en ftp 2017?)

  2. Konvertera samtliga *.shp till *.geojson. Använd convertall.sh. Kom ihåg att lägga till -s_srs EPSG:3006 -t_srs EPSG:4326 för att reprojicera till wgs84 i samma veva.

  3. Slå ihop alla *.geojson som ska vara med som lager i *.mbtiles filen med cat *.geojson > vagk_01_wgs84.geojson

  4. Använd Tippecanoe för att konvertera vagk_01_wgs84.geojson till mbtiles.

@johnniehard
johnniehard / sketch.js
Created May 25, 2017 08:21
Converts a p5js graphics object to an Image object. This way you can use an off screen buffer to create image masks.
function graphicsToImage(graphics){
var img = createImage(graphics.width, graphics.height);
img.loadPixels();
graphics.loadPixels();
for(var x = 0; x < img.width; x++){
for(var y = 0; y < img.height; y++){
idx = 4 * (y * img.width + x);
img.pixels[idx] = graphics.pixels[idx];
img.pixels[idx+1] = graphics.pixels[idx+1];
@johnniehard
johnniehard / gist:7e253518bfff4962b1868e254a050239
Created May 16, 2017 09:34
leflet minimal
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>tourMap</title>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.3/dist/leaflet.css" />
<script src="https://unpkg.com/leaflet@1.0.3/dist/leaflet.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet-providers/1.1.15/leaflet-providers.min.js"></script>
@johnniehard
johnniehard / gospatial_batchprocess.py
Last active June 8, 2017 15:14
Batch process an input directory with GoSpatial
'''
Author: Johnnie Hård, johnnie.hard@gmail.com
Purpose: Batch process all files in a directory with gospatial
'''
import os, subprocess
# Set input/output directories
# cwd = the directory where the script gets called.
cwd = os.getcwd()