Understanding Great Circles and Rhumb Lines When navigating the Earth’s surface, understanding the two primary types of routes—Great Circles and Rhumb Lines—is crucial. This guide will explore these concepts in detail, helping you grasp their significance in navigation. Concept of Distance Distance is defined as the spatial separation between two points, measured in various…

Slope Analysis in QGIS: A Step-by-Step Guide Step 1: Download and Prepare Your Digital Elevation Model (DEM) To begin with, you will need a Digital Elevation Model (DEM) for your area of interest. You can download this from the Earth Explorer website. SRTM data would be a good choice for slope analysis. Step 2: Load…

Understanding Triangular Irregular Networks (TIN) Triangular Irregular Networks (TINs) are a powerful method for representing continuous spatial data using a vector format. They are particularly useful in visualizing topographic surfaces and handling irregularly spaced datasets. What is a TIN? A TIN is constructed from a series of nodes defined by their x, y, and z…

Automating Processes in QGIS with the Graphical Modeler Step 1: Opening the Graphical Modeler To begin, navigate to the Processing tab in QGIS and select Graphical Modeler. This will open the modeller interface where you can create and manage your models. Step 2: Setting Up Your Model In the modeller, you’ll need to define a…

Calculating Shortest and Fastest Paths using QGIS Step 1: Install the ORS Tools Plugin To get started, you need to install the ORS Tools plugin in QGIS. Follow these steps: Go to Plugins in the menu. Select Manage and Install Plugins. Search for ORS Tools in the repository. Click Install to add the plugin. Step…

How to Download Free Global Bathymetry Data Step 1: Accessing the GEBCO Website To start, open your web browser and type “GEBCO” into the search bar. Press enter, and you should see the General Bathymetric Chart of the Oceans as the first result. Click on the link to access the GEBCO homepage. Or use this…

How to Clip a Raster by Mask in QGIS Step 1: Prepare Your Polygon and Raster To start clipping a raster layer by a mask layer, you need both a polygon and a raster. The polygon can represent a specific area of interest, such as a watershed boundary. Ensure you have created your polygon and have…

Google Street View in QGIS Step 1: Install the Go2StreetView Plugin Open QGIS and navigate to the Plugins menu. Select Manage and Install Plugins. In the search bar, type go to street view and press Enter. You should see the Go2StreetView plugin listed below. Click the Install button. If you already have it installed, it will…