ExtJS

Most Popular Libraries for Front-end Web GIS Development

Most Popular Libraries for Front-end Web GIS Development

The onset of the World Wide Web has revolutionized everything around us and GIS is not an exception.  The Web GIS is an advanced type of Geographic Information Systems made available on web platforms. It operates on the Client-server architecture. A GIS server is identified by a uniform resource locator (url). It responds and gives…

GeoExt, ExtJS, OpenLayers and GeoJSON

GeoExt, ExtJS, OpenLayers and GeoJSON

Hello guys, some time ago I did a sample application on GeoExt, ExtJS, OpenLayers and GeoJSON to manage data from a number of weather stations in the country. This is a front-end application with data being in GeoJSON format. A video about the application uploaded on YouTube : The application can be accessed at Weather…

GIS

Adding data into ExtJS grid from PostgreSQL with PHP-The JSON format

Data loading from a database into an application is useful more so if there will be frequent changes on the data stored in the databases. The data is loaded from the database when the application is loading. Any changes on the data are reflected into the grid carrying our data in the application. I will…

Open-Source Web Maps

Open-Source Web Maps

During my second year of college, I came across this technology where maps could be rendered online (web mapping) and users could interact with the maps for visualization and analysis. I found this technology interesting and decided to give it a shot. I encountered the “usual” barriers experienced by any beginner in coding. Then, I…