Adam Han's Blog

A greenfield subdivision is built on land that has not been developed before, such as former farmland or open land at the city’s edge. Its lots, and often its streets, are new, so there are no existin

“Is this point to the left or to the right of my path?” Or a more intuitive situation: Is the address point to the left or right of the street? This post explores how to solve this using the 3D cross

IntroductionAssume that all coordinates are expressed in a suitable projected Cartesian coordinate system, so Euclidean lengths and planar areas are meaningful. Land subdivision sometimes involves mov

Question: Offset one edge of a quadrilateral (giving a new edge ) to form a new (usually smaller) quadrilateral (parcel) whose area equals a predefined value . Find the offset distance . Short answ

The Openwrt VM running in my fanless pc is the main router of home network. Recently I got a new router which has 6 NICs and a more powerful CPU. So I need to migrate the Openwrt VM to the new machine

1. IntroductionIn offshore petroleum exploration practice, the coordinates of blocks designed by geologists for a particular purpose must be provided in Degree-Minute-Second format: the degree uses 2

I tried to use Linux back in 2004, and started to use it as a daily operating system in 2016. Maybe because I wasn’t (though I tried to be one) an IT worker, I never met a person using Linux in person

OpenWrt is an open source linux system tailored for routers. Using an offical OpenWrt VM system as router has obvious benefits: enjoy the most flexibility of OpenWrt and get rid of the outdated vendor

I have used my network scanner through Windows for a long time. It works well except I need to get a Windows laptop. Although the default storage path of the scanner resides in a samba server, it is s