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How was Nepal datum 1981 established ?

ByKeshav Raj Bhusal June 27, 2023June 27, 2023Write a Comment

Nepal Datum was established with the collaboration of United Kingdom’s Directorate of Military Survey, Ministry of Defense (MODUK) by Survey Department of Nepal. It is a precise and comprehensive geodetic network of Nepal.

Despite having sufficient controls established by Survey of India(SOI) and other various institutions over that time it was not sufficient to meet the modern mapping and engineering demand. Due to this extensive geodetic network was needed and establishment of this network was undertaken by British Military Surveyors.

surveying

How to calculate independent coordinates of traverse station with the help of distance and bearing ? | Comprehensive guide

ByKeshav Raj Bhusal June 16, 2023January 4, 2024Write a Comment

Calculating independent coordinates of traverse station is a hectic process involving many steps. In this article, I’ll be explaining each steps in detail.

career stories

Being DRR fellow

ByPrabin Pokhrel April 27, 2023April 28, 2023Write a Comment

As a freshly graduated geomatics engineer, we must have always been fascinated by the possibilities of using technology to make a difference in people’s lives. And my role in the Disaster Risk Reduction – Young Leaders Fellowship program had given me an opportunity to fulfill this passion.

geomatics career

What after geomatics engineering?

ByKeshav Raj Bhusal April 10, 2023April 12, 20235 Comments

I’m a geomatics engineer. When I passed out from my college, I didn’t know clearly what to do? What is the next step after being passed out? I was pretty confused and worried about my career. I used to text my seniors, call and visit them personally for suggestions. This article will help all the freshers to choose their career wisely.

surveying

Tips to make a survey successful

ByKeshav Raj Bhusal April 1, 2023April 2, 2023Write a Comment

Survey is the first step before any construction. It requires time and effort to collect a desired data and its difficult to undo the survey. So, here are my of […]

gistutorial

How to do projection of a vector data in QGIS ?

ByKeshav Raj Bhusal March 20, 2023March 20, 2023Write a Comment

Projection is the process of transformation of higher dimensional space (3D) into a lower dimensional space (2D). If we talk about measurement, Projected coordinate system is more accurate than Geographic coordinate system. It is one of the frequently done task in GIS.

gistutorial

How to generate contour from DEM in QGIS?

ByKeshav Raj Bhusal March 19, 2023March 19, 20231 Comment

There are many methods or sources for obtaining contour like cartographic source (digitalization of old topo map), stereo-pairs, lidar data, photogrammetric methods, GIS softwares etc.

One of the data source for contour is Digital Elevation Model (DEM). In this tutorial we will learn how we can get contour through DEM in QGIS. Follow the following steps:

gistutorial

How to prepare slope map from DEM in QGIS ?

ByKeshav Raj Bhusal March 18, 2023March 18, 2023Write a Comment

The main objective of this tutorial is to learn technique of generating slope from DEM. After getting slope we will also reclassify slope. We are going to do this in QGIS.

cartography

Elements of Map

ByKeshav Raj Bhusal March 14, 2023March 19, 2023Write a Comment

Have you ever seen a map? What do you see? You see color, shape, some text, symbols or icons, geographic reference layers and some other thing that tries to give some message. Map presents some information from the data.
Can you read a map? Professionally I’m a Cartographer and frequently show my maps to my friends. Somehow they manage to get the information from the map but they don’t understand all the things given in the map.

gistutorial

How to add a new class field name in LULC ?

ByKeshav Raj Bhusal March 11, 2023March 13, 2023Write a Comment

Our LULC raster has DN values in its pixels and we have labeled it by symbology under different classes like ‘WaterBodies’, ‘Forest’, ‘Urban’ etc. But unlike vectors we can’t directly store values in raster creating a new field in open attribute table explaining DN ‘1’ means ‘WaterBodies’ or something like that. Also raster with DN value meanings(like forest, urban etc.) can be used later to give rank to different classes in Multicriteria Decision Analysis.