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Understanding multi-dimensional arrays | Use Google Refine to Export JSON "That's great," you say. "But how can I edit the data to use the really cool Protovis examples?" The answer lies in multi-dimensional arrays. In this example, race is the parent and the children are Asian, American Indian, etc. Let's take it a step further and look at race in three different counties in Florida. Now here's where it gets a bit tricky. This example is easy to understand but it's only the beginning. Filed under: Data Visualization

Landsat Landsat is low resolution satellite imagery, produced by NASA. The imagery is worldwide and released to the public domain, so can be used as a source for OpenStreetMap. Compared to other imagery (eg Bing), Landsat is lower resolution, but it can still be useful for tracing large features, eg forests, lakes or coastlines. Landsat images can be viewed in JOSM using the WMS/TMS imagery feature (this is now part of JOSM core, WMSPlugin is not needed). As default, this comes configured with this URL for Landsat: A Landsat mirror is available from, this is listed in the JOSM WMS/TMS preferences as "Landsat (mirror)". If this displays red 'exception occurred' images, it normally means the WMS server is down or rate limited at the current time. Landsat via Bing and Yahoo! In fact Landsat imagery (or a colour-tweaked version of it) is often used as base-level detail by imagery providers in regions where no better imagery is available. Global Mosaic

Mapnik Available languages — Mapnik is an open source toolkit for rendering maps. Among other things, it is used to render the five main Slippy Map layers on the OpenStreetMap website. Mapnik is written in C++ and can be scripted using binding languages such as JavaScript (Node.js), Python, Ruby, and Java. the Mapnik Installation Wiki. You can learn more about using Mapnik at The Mapnik Wiki and by joining the #mapnik channel on freenode Note that Mapnik is a software project and should not be confused with any of the common map stylesheets that might be named after Mapnik. Overview Mapnik can output map images to a variety of graphics formats - PNG, JPEG, SVG, and PDF. Mapnik Styles Mapnik allows for customization of all the cartographic aspect of a map - data features, icons, fonts, colors, patterns, and even certain effects such as pseudo-3d buildings and drop shadows. There are a number of external tools that can assist in the creation of Mapnik styles. Data Sources PostGIS Shapefile GeoTIFF

Amenity Editor for OpenStreetMap mbostock/d3 #Rhok #Bog: Hackeando para la Humanidad Los desarrolladores de software de todo el mundo están invitados el próximo 2, 3 y 4 de diciembre a participar en Random Hacks of Kindness (RHoK), un evento mundial en el que expertos en tecnología donarán algunas horas de trabajo durante esos días. Los participantes apoyarán a diferentes organizaciones humanitarias de todo el mundo, a resolver los problemas que han planteado, incluyendo algunas relacionadas con la temporada invernal en colombia. En Bogotá la cita inicial es el viernes (8:30 a.m) en el aula múltiple del segundo piso del Ministerio TIC (primer piso, Edificio Murillo Toro Cra. 8a entre calles 12 y 13) , allí se dará apertura a la actividad y se indicará donde continuará la jornada, el sábado y domingo. Se requiere inscripción previa. Ésta es la quinta versión de RHoK, en la que Bogotá estará participando por tercera vez.

GPSylon - an Open Source Java GPS Map Application/Framework. The dinopolis gpstool package is an open source (LGPL) Java GPS application. It consists of different modules that may be used as a programmer's framework or as an application. The main application is GPSylon. News 2006/10/23: New Release 0.5.2: Serial communication with gps devices fixed - no installation of java serial libraries needed. 2006/02/10: Minor bug fix on loading gpx tracks. 2006/02/01: Giving Google Ads a try. 2006/02/01: Finally, separated the gpsinput library from the rest, redesign of homepage (css'ed it). 2003/05/12: As the name GPSMap is already used by several other projects/products, the main application is renamed to GPSylon. Short Description of GPSylon GPSylon is able to show maps downloaded from the expedia map servers. The main feature is the display of various maps. It allows the download of a single map or for a given location or for multiple maps in a given rectangular area from mapblast or expedia map servers. Features The following features are implemented.

Start Was ist flosm? Auf flosm finden sich Landkarten, die auf Daten des OpenStreetmap Projektes basieren. OpenStreetMap ist eine Community, die sich zum Ziel gesetzt hat, eine freie Weltkarte zu schaffen. Jeder kann mithelfen, diese Karte zu entwickeln. Informationen visualisieren Die Kartendaten enthalten mittlerweile sehr viele Informationen. Dafür entwickeln wir nach und nach verschiedene thematische Karten,die zeigen sollen, was für ein Potential in diesem Projekt steckt. Neu ist unsere Karte mit den Verwaltungsgrenzen. Die Informationen der POI-Karte werden laufend erweitert und inzwischen sind über 250 verschiedene Kategorien darstellbar. Die erstaunliche Vielfalt der vorhandenen Daten zeigt sich unter anderem bei der Stromnetzkarte, die neben den Kraftwerken und Umspannwerken auch die weltweiten Hochspannungsnetze visualisiert. Download von Rasterkarten Fast alle Karten lassen sich über den Download-Button in hoher Auflösung für die Verwendung im Druck exportieren. Servertechnologie

untitled The Moving Parts Tabletop initialization The simplest Tabletop initialization works like this With a function living somewhere else called `showInfo` . You pass in either ‘url’ as the full published-spreadsheet URL, or just ‘key’ if you're clever enough to cut apart the URL. It calls showInfo when done, passing an array of models. ‘key’ is the key of the published spreadsheet. ‘url’ is the URL of the published spreadsheet. ‘callback’ is the callback for when the data has been successfully pulled. ‘simpleSheet’ can be true or false (default false). ‘parseNumbers’ can be true or false (default false). Tabletop itself Once you've initialized Tabletop you can access its good parts. ‘models’ are the ‘Tabletop.Model’s that were populated, one per worksheet. ‘data()’ returns the rows of the first model if you're in simpleSheet mode. Tabletop.Model Tabletop.Model is pretty boring, let's be honest. ‘.name’ : The name of the worksheet it came from (the tab at the bottom of the Spreadsheet) Notes Credits