Spatial clustering with PostGIS PostGIS is an extension for the PostgreSQL database that adds support for spatial data types, indexing, and functions for spatial queries. Here are a few examples of how you can use PostGIS to perform spatial clustering: DBSCAN clustering DBSCAN (Density-Based Spatial Clustering of Applications with Noise) is an algorithm that clusters…

JavaScript and GIS In this article we will discuss the use of JavaScript in GIS for building GIS APIs, web maps, and backend and frontend GIS web applications. Additionally, we will briefly look at JavaScript, and the features that make the language suitable for various use cases. JavaScript According to the official documentation, JavaScript is…

Getting Started with PgRouting Some of the most common questions to answer when opening a map are probably “Where are we?”, “How do we get from point A to point B?”, “Should we take I-84 or I-95?”, “Which trail will give us the best views on the hike up?”. These questions can be answered by…

What is a point of interest? Point of interest (POI) data is a type of geographic data that describes specific locations that are of interest to a particular audience or user group. POI data can include a wide range of location-based information, such as the names and addresses of businesses, landmarks, natural features, and other…

85 applications and use cases for satellite imagery

What Is Reality Capture? Reality capture is a term used to describe the process of digitally capturing, analyzing, and representing the physical world. This can be done using a variety of technologies and techniques, such as laser scanning, photogrammetry, and structured light scanning. Reality capture typically involves the use of specialized equipment and software to…

The Difference between projection and datum In the context of geography and mapping, the terms “projection” and “datum” refer to different aspects of the coordinate system used to represent the earth’s surface. A projection is a mathematical method for representing the curved surface of the earth on a flat map. There are many different map…

What is pixel Depth? Pixel depth, also known as bit depth, refers to the amount of information stored in each pixel of a digital image. It is typically measured in bits per pixel (bpp), with common values being 1 bpp (black and white), 8 bpp (grayscale), 24 bpp (true color), and 32 bpp (true color…

What is geographic topology? Geographic topology is a branch of geography that studies the spatial relationships between objects or features on the earth’s surface. It is concerned with understanding how these objects or features are connected and how they relate to one another in space. Geographic topology is often used to analyze spatial data, such…

Every Thing You Need To Know About Geocoding Geocoding is the process of converting addresses or other geographic data, such as place names or latitude and longitude coordinates, into a standardized format that can be easily understood by computers. This is often done in order to enable spatial analysis or to display geographic data on…