Web development has come a long way from static visualizations to complex single page apps (SPA), to the even more recent Progressive Web Apps (PWAs). SPAs allowed complex business logic in a web app and PWAs took it a step further by working without an active internet connection like native…

In this article I share the steps followed to successfully move WhatsApp data from an Android device to an iPhone. This process worked fine as of Feb 9, 2019 and costed $25 USD. It takes about an hour and heavily depends on the amount of data. And we do not…

ML algorithms work only with numerical values. So there is a need to model a problem and its data completely in numbers. For example, to run a clustering algorithm on a road network, representing the network / graph as an adjacency matrix is one way to model it. Once transformed…

Install Homebrew brew install postgres initdb /usr/local/var/postgres To start server at startup mkdir -p ~/Library/LaunchAgents ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist /usr/local/Cellar/postgresql/<version>/bin/createuser -s postgres Now, it is set up, login using psql -U postgres -h localhost or use PgAdmin for GUI.

Install Homebrew brew install postgis If it fails due to permission issue: sudo chown -R “$USER”:admin /usr/local to affect every sub directory of local or you can only mention the directory pointed by Homebrew 4. Login: psql -U postgres -h localhost -d gis Here gis is the database to which I want to add Postgis capabilities 5. `CREATE EXTENSION postgis;` 6. Login to pgAdmin GUI software to check the functions and views added to this DB! These are all geospatial functions.

This document is drafted from my experience after strenuous tinkering with multiple tutorials to create a tile server and a client that uses this tile server, basically after this you will have your own Maps, like Google does. …