In this post, we will merge two polygons in OpenLayers(polygons that intersect each other) into one polygon as shown in the above GIF image. The merging of two polygons is also known as the union of two polygons. In the last tutorial, we demonstrated how we can split a polygon by a line into two […]
Merge Two Polygons in OpenLayers Read More »
In this tutorial, we are going to create a dynamic measurement tool in OpenLayers version 6.5. We will create a Line and Area measurement tool to show measurements on labels that follow changing geometry like area, length or cursor position as shown in the above GIF image Download the complete code of Dynamic Measurement from
OpenLayers is a great open source GIS library which is used to develop a rich featured GIS web applications. But sometime you need to implement advanced spatial/geometrical operations. For example, union of two geometry, creating buffers, creating hole in polygon, dividing a polygon in two parts by a line as shown in following images. But,
Perform complex spatial operations in OpenLayers using JSTS Read More »
For Part-1, Click here ol.View, ol.layer and ol.source are one of the foundations of OpenLayers application. You can not move ahead without understanding them. Let’s understand them with the help of following code. ol.View: It is used to set the view of map. At line number 25 in above code snippet, our map object(defined at
View, Layer and Source in OpenLayers-Part 2 Read More »
OpenLayers is an open source mapping JavaScript library which allows developers to develop highly interactive GIS web application. It can displays map tiles(or image) and vector data. In this post, we will create a simple GIS web app which will display OpenStreetMap on it. OpenStreet map is similar to Google Map. We will use a
Build your First GIS Web App using OpenLayers-Part 1 Read More »
Projections or Map Projections are attempts to portray the 3D surface of the earth or a portion of the earth on flat surface like flat surface or XY plane or Cartesian Plane. The method by which 3D earth surface or curved surface is laid flat to a flat surface or XY plane is known as
Projections in GIS Read More »
