Download Digital Terrain DEM (Digital Elevation Model) and create contours Maps

Digital Elevation Model is a 3D representation of a terrain. It is generated by collecting elevation points of terrain. We don’t have to do hectic work like this as webgis provides us with ready-made digital elevation data. WebGIS is where you can find all the leading information and resources for Geographical Information Systems. Here you will find … Continue reading “Download Digital Terrain DEM (Digital Elevation Model) and create contours Maps”

Add table attributes with joining two files in QGIS

Want to add more attributes in your Shapefile to respective feature? QGIS an open source tool, which I recommend to every Geographer for use, can give you direct solution. Sometimes we need to join more attribute to a GIS vector files which ultimately provide more power to you for analysis with more attributes. For joining … Continue reading “Add table attributes with joining two files in QGIS”

How to Georeference Map Image with Geo Coordinate Control points

How to Geo-reference Map Image with Geo Coordinate points in QGIS (Quantum GIS). Georeference is a process to associate geographic location coordinates to any kind of physical object which is physically present over a Raster image map or to a physical map, with help of other georeferenced data or with know location coordinates of some points of … Continue reading “How to Georeference Map Image with Geo Coordinate Control points”

Select and calculate area, length and perimeters of features in QGIS

Select and calculate features according to area, length and perimeters in QGIS. Let us explore some selection technique and also how to use calculation in QGIS. To calculate these parameters we have to change the unit of the calculation to meters. If the layers are in WGS84 CRS we will get measurement in degrees, so first … Continue reading “Select and calculate area, length and perimeters of features in QGIS”

Edit – Export – download data from OpenStreetMap in QGIS

Edit – Export – download data from OpenStreetMap (OSM). Open Street Map is a free editable map of the world, and is very easy to handle. Here in this post we will see how to edit and create geometries on open street map. Also how to export, download and convert the .osm file to any … Continue reading “Edit – Export – download data from OpenStreetMap in QGIS”

Geo-processing Vector Analysis – Distance, Near by, Buffer, Intersection in QGIS

Geo-processing Vector Analysis – Distance, Near by, Buffer, Intersection in QGIS. Vector analysis is one of the important part of GIS. There are many vector analysis operation which we can discuss on another article theoretically. Here you will learn how to perform vector analyssis with QGIS too. Suppose,  you want to select and find some places which … Continue reading “Geo-processing Vector Analysis – Distance, Near by, Buffer, Intersection in QGIS”

Digitization in QGIS – Exploring tools for Digitizing

Digitization in QGIS – Exploring tools for Digitizing. Digitization is one of the important tasks for a GIS specialist. Digitization is a process of converting raster data to vector data. For this task QGIS provides many tools for efficient digitization. Digitization (or vectorization) should be clean and a copy of the raster data so that … Continue reading “Digitization in QGIS – Exploring tools for Digitizing”

Change projection of a georeference file in other projection – Reprojection in QGIS

Reprojection in QGIS – Change projection of a georeference file in other projection. Earth is not a complete sphere; it is referred to as spheroid. Generally QGIS use by default Latitude and longitude (WGS 84) coordinate reference system which gives measurement in degrees. Projection is a very vast topic but we will discuss some basic concept … Continue reading “Change projection of a georeference file in other projection – Reprojection in QGIS”

Upload Excel latitude longitude in QGIS as Spatial Layer

Upload Excel latitude longitude in QGIS as Spatial Layer and save as Shapefile.  When you have collection of point data i.e latitude and longitude, stored in Excel file in different column, then you can easily view and Save it as Vector layer file in QGIS(Quantum GIS). Well after uploading Excel latitude longitude values as spatial layer, … Continue reading “Upload Excel latitude longitude in QGIS as Spatial Layer”