OpenAQ Workshop Notes

I recently attended the OpenAQ workshop in Delhi . The workshop’s goal was to bring tech, science and media folks working on air quality together and brainstorm how to use open data to tackle air pollution challenges. Below are my notes and links to materials presented during the workshop.

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Line Transact Surveys using OpenDataKit(ODK)

This weekend, I got an opportunity to volunteer with a non-profit called Junglescapes. We took a day trip to the Bandipur forest in Karnataka where they have done extensive work in forest restoration. One of their success stories is working with the locals to remove invasive species such as Lantana ...

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Creating Geospatial PDFs with GDAL Tools

GeoPDF is a unique data format that brings the portability of PDF to geospatial data. A GeoPDF document can present raster and vector data and preserve the georeference information. This can be a useful format for non-GIS folks to consume GIS data without needing GIS-software. While GeoPDF is a proprietary ...

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Geo Data Processing with Mapshaper

Mapshaper is a free and open-source tool that is best known for fast and easy simplification. Other tools for simplification - like QGIS or ogr2ogr - do not preserve topology while simplifying. This means you may get sliver polygons or missing intersections. Mapshaper performs topologically-aware simplification and gives you much more control ...

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Le Paper Globe

A long pending weekend project is done. Printed, cut and folded a sturdy globe using the template from Le Paper Globe.

Completed globe.

This is not only fun, but a good prop to learn more about Geography. I envision it would make a fun do-it-yourself project with kids of all ages.


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Calculate distance between a pair of lat/lon coordinates

I recently had a need to calculate distance between a large number of latitude/longitude coordinate pairs. There are many options available if you want to import these in a GIS and run analysis. But there is a simpler and much more accesible way if you aren't doing very ...

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Notes from FOSS4G India - 2012

India’s first FOSS4G - India conference was organized on 25-26 October, 2012 at Hyderabad. This was a surprisingly low-profile event and there was very little buzz about it on the internet. I learnt about it just in time to register and make it to the event. Here I am sharing ...

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Notes from Carotonama - 2012

I was at #cartonama conference in Bangalore on 23rd September. It was wonderful to be among geogeeks and see the energy and enthusiasm. Got to see some great demos and LBS apps from startups in India. Here's a run down from my notes and bookmarks.

  • Traffic cams in Bangalore ...
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GIS Project Ideas for Thesis/ Dissertation/ Internship

Many students have asked me for ideas on what topic they should choose for their Thesis. I have debated this myself when I was a student. The ideal topic would be the one that allows you to dive into a topic deeply as well as give you some practical skills ...

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