Cartonama Conference

Making the most of geospatial data, community mapping, and location-based services.

The ‘Where’ question is central to our everyday lives. Geospatial data shapes our ability to answer that question and build intelligent applications, whether on the web or on your mobile device.

Supported by contributions from crowd-sourced data projects and open source software, geo data and its technology spectrum has grown impressively in recent years. In the face of this massive and diverse range of spatial data and technologies, the ability to choose effective methods for storage, retrieval and visualisation becomes critical .

The Cartonama conference is about geographic data, the technology behind it, the applications built around it and the overarching aspect of community and mobility.

We will organize workshops along with the conference. The goal would be to provide hands-on training to collect, store and visualize geographic data, and finally, to build location-based services with these tools. Workshop theme falls into:

  • Nature of Geospatial Data: Structure, Formats and Operations
  • Collection, Storage & Delivery of Geospatial Data: Crowd-sourced Models, Standards and Databases
  • Location-based Services: Front-end and Back-end tools to build and manage your applications
  • Leveraging Open Geographic Data Repositories: Using OpenStreetMap to visualize and tell stories through maps

You can submit your workshop proposals via the submissions through the funnel below.

##Speaking submissions
You can submit a proposal to speak at Cartonama via the submission funnel below. Please describe your proposal in as much detail as possible. Detail is important if you’d like to be voted up into the schedule.

Your submission will be up for public voting for up to 2 weeks before the event. For the final tally, we will only consider votes from ticket holders, as a way to ensure participants get exactly what they pay for.

Making a funnel submission does not guarantee final selection. Selected speakers will get a free ticket to the event (limited to one speaker per proposal). Proposers whose talks are not on the final schedule will be able to purchase tickets at the prevailing rate for the day on which they made their proposal.

You can buy a ticket to the event here.

Hosted by

Cartonama is HasGeek’s conference on mapping and location-based services. more

Yuvi Panda


Reading and Writing GeoData on the web

Submitted Sep 12, 2012

This workshop is aimed at getting people to fully understand the basics of building an end-to-end geo data pipeline - getting data in, storing/representing it, and displaying it in various ways.


The workshop will cover using the Leaflet mapping library to display a GeoJSON feed on a map. We will cover styling and filtering layers, handling events like mouse-over / click, and finally, editing layers and saving back to the server.

Aim of the workshop would be for people attending to go out with a clear idea of how to do read/write with mapping data on the web. We start with read (GeoJSON from server -> plain rendering + customization) and then move to write (adding markers/shapes, then serializing them as GeoJSON to get sent to the server for persistance)

On the back-end, we will cover the basics of setting up a GeoDjango project, defining one’s models, and using the GeoDjango ORM to query spatial data, and then output data as GeoJSON. We will cover different geographic field types and basic geo concepts like projection, etc. but not go into too many back-end details. Also, while we will use GeoDjango as the back-end frame-work, attempts will be made to make the concepts as generalized as possible. Familiarity with basic MVC concepts and some experience of working with an ORM would be desirable, but not required.

We will spend the majority of time on building in-browser tools to display, style and edit GeoJSON data sent from the server. We will cover setting up Leaflet, various in-built controls, the general architecture / conventions used in the library, setting up various map layers, and working with the Leaflet draw plugin to draw and edit features on the map. We will cover adding interactivity to features, like click and mouse-over events, as well as having other controls on the web-page to change the style of objects. We will go through the basic work-flow of editing and drawing features, and serializing them to GeoJSON to send back to the server to save.


Familiarity with Web Development (Javascript/jQuery, MVC) is necessary. Experience with Python/Django is useful, but not necessary

Speaker bio

Sanjay Bhangar is co-founder of CAMP ( ), an artist / hacker-space in Mumbai and works part-time with Topomancy LLC on map-based projects. He has worked on and a wide range of web-based initiatives.

Yuvi Panda is a 21 year old open source geek who chases shiny new things way too often. He wrote major parts of the Wikipedia Android/iOS app and POSM, a nice mobile editor for OSM. Amongst his hobbies is taunting people who still use OpenLayers. He’s currently a student at KCG College of Technology.


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Hosted by

Cartonama is HasGeek’s conference on mapping and location-based services. more