When using OpenLayers for map drawing or modification, it’s important to know about the snap interaction. This will allow your features (such as roads) line up with other nearby objects when you’re done editing them so that they look nice and tidy instead of jumbled together carelessly like in confuse fashion! Click here to get […]
Implement Advance Snapping in OpenLayers Read More »
OpenLayers is an powerful map api to develop map based applications. But to perform complex spatial operations like splitting a polygon, merging two polygons etc., we need to find another way to accomplish these operations. OpenLayers can’t do these operations on its own. This tutorial is the extension to following tutorial. If you have not
Split a Polygon with holes by Line in OpenLayers Read More »
ogr2ogr by GDAL project is a command line tool for GIS data processing to “Convert simple features data between different file formats”. It can performs various operations like Converting data between different formats like shapefiles to GeoJSON, GeoJSON to shapefiles etc. Transforming data from one projection to another projection Doing spatial selection on data Exporting
ogr2ogr – A simple command line tool to transform your GIS data. Read More »
The usage of Python in GeoSpatial field has exponentially grown. Almost every GIS desktop software provide python integration. QGIS, famous open source GIS software, has python interface. Python has many open source GIS libraries for example GDAL, Fiona, GeoPandas, RasterIO, Shapely, Xarray Spatial etc. These libraries can process both raster as well as vector data.
Import Shapefile to PostgreSQL/PostGIS database using GeoPandas/Python Read More »
zIndex helps in managing the stack order of layers. When you add multiple layers in OpenLayers web application, all layers are stored as stack data structure. The layer which is added first, will be at the bottom of stack and layer which is added recently or last, will be on top of stack as shown
Layer’s ZIndex in OpenLayers Read More »
An event is some thing a browser does or a user does. An event can be a mouse click on button or a right click, double click etc. Map Events in OpenLayers are specific to map. These events can help the developers to achieve a particular task. For example, opening a feature information popup of
Map Events in OpenLayers Read More »
Hello Everyone, Welcome to next tutorial of open layers in which we will learn to create feature information tool on map click in OpenLayers. So what is Feature Information in GIS ? Feature information is Non-GIS information associated with GIS data. For complete source code of this tutorial, click here Check the Live Feature Information
Create Feature Information Popup tool in OpenLayers on map click Read More »
What is GIS ? GIS stands for Geographical Information System(GIS). It is a system for gathering, storing and analysing GIS data. A GIS data is a data which has some location information associated with it. A very simple and popular example is GPS on your smart phone. Through GPS and Satellite, we gather our live location
Prerequisite: You need to have beginner level knowledge of QGIS and PostGIS to understand this post. QGIS and PostGIS are one of the most famous open source GIS tools in GIS community. QGIS is used for the visualisation and processing of GIS data where as PostGIS is an extension to PostgreSQL database to store GIS
GIS Data Analysis Using QGIS and PostGIS-Part 1 Read More »
OpenLayers is an powerful map api to develop map based applications. But to perform complex spatial operations like splitting a polygon, merging two polygons etc., we need to find another way to accomplish these operations. OpenLayers can’t do these operations on its own. Get the full code at the GitHub repo. Check the live demo
Split a Polygon by Line in OpenLayers Read More »
