Convert between UTM and Degree coordinates using Google Spreadsheets

Converting between different coordinate reference systems or projection is a fairly standard feature in a GIS. There are a number of command line tools also available for performing bulk-conversions. cs2cs program, part of the PROJ.4 library is my favorite. Recently, someone presented me with an interesting challenge. They were collecting field data in UTM coordinates and needed … Continue reading Convert between UTM and Degree coordinates using Google Spreadsheets

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 on the process. Other … Continue reading Geo Data Processing with Mapshaper

Implementing a Field Data collection app for APD

The Association for People with Disability (APD) is a non-profit organization based out of Bangalore, India. Their mission is to reach out and rehabilitate people with disability from the under privileged segment. Over the past year, I along with my colleagues have been volunteering with them to develop a system that can help improve their field data … Continue reading Implementing a Field Data collection app for APD

Le Paper Globe

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