Sam Matthews mapsam

Mapnik and the Mapnik-related tools have a series of useful debugging tools built into their repositories. Since these live across repos, it can be difficult to remember where they exist or even if know if they exist. This lists out all of the useful bin commands that have been built for debugging purposes when working on Mapnik.

`node-mapnik`

located at: https://github.com/mapnik/node-mapnik/tree/master/bin

mapnik-index.js
mapnik-inspect.js
mapnik-render.js
mapnik-shapeindex.js

Painted

Blake described a painted tile like this:

Think about if I was rendering a 0/0/0 tile from postgis and there was only a small park in my data. It would probably collapse to nothing at 0/0/0 resolution so the entire tile would be empty. So the tile would be considered empty, but there was originally data below it so for pyramid rendering we want to know that you can’t just copy this tile from now on. Therefore painted says “hey! there was some data!"(edited)

Ballard Labs

Website: http://www.ballardlabs.com/
Location: http://osm.org/go/WIX6yTfEt?node=4051961489

Pricing

Type	cost / month	description
Open workspace	$299	daytime access, open workspace

version	dependency	dep version	description

We are going to jump into Git, the version control system behind GitHub. Many projects, geospatial or otherwise, rely on git to track changes made to source code and documentation so people can work collaboratively without accidental code deletions.

Lesson breakdown

Git vocabulary quest
GitHub and social coding
Introduction to the command line
Standard Git workflow
Maps & GitHub
Websites with GitHub pages (if time permits)

The website is jekyll-based (which you know plenty about!). The resume page at mapsam.com/resume uses these key files:

_layouts/resume.html: this is template for the resume page. You'll notice a few different for loops on this page that look for jobs, cv items, and extras formally declared as "things" because I couldn't come up with a better word 😄
resume/index.md: this is the meat of the potato, where all of the "data" for the resume exist. Notice in the YAML (the syntax for the top part of the file between the --- triple dashes) there are sections for jobs

	var fs = require('fs');

	var map = new mapnik.Map(256, 256),
	img = new mapnik.Image(256, 256),
	data = fs.readFileSync('/path/to/data.shp'),
	vectortile = new mapnik.VectorTile(0,0,0);

	// add shapefile to vector tile
	vectortile.addData(data, function(err) {
	if (err) throw err;

	var mapnik = require('mapnik');
	var fs = require('fs');

	var iterations = 20000,
	i = total = 0,
	max = -Infinity,
	min = Infinity,
	tile = './785.vector.pbf';

	decode();

	#!/usr/bin/env node

	"use strict";

	var exists = require('fs').existsSync \|\| require('path').existsSync;
	var fs = require('fs');
	var usage = 'usage:';
	usage += '\n mapnik-info.js <tile.mvt> z x y';

	var tile = process.argv[2];