Haversine Formula – Calculate geographic distance on earth

Haversine Formula – Calculate geographic distance on earth. If you have two different latitude – longitude values of two different point on earth, then with the help of Haversine Formula, you can easily compute the great-circle distance (The shortest distance between two points on the surface of a Sphere). The term Haversine was coined by Prof. … Continue reading “Haversine Formula – Calculate geographic distance on earth”

Measure Straight line distance in Google Map

Measure Straight line distance in Google Map between two points. Straight line distance can be calculated with Haversine distance formula or Great circle distance formula. Google Map, a web mapping service application and technology, which provides and enrich a common user experience for free, like, Route planner for traveling by foot, car or public transportation with … Continue reading “Measure Straight line distance in Google Map”

Create save digitize and download kml or kmz from Google Earth. Google earth can be named a virtual globe or map of earth, which provide high resolution view of any area in recent years or any period of time from last decades. Always its not possible to go for field survey and prepare the layers … Continue reading “Create save digitize and download kml or kmz from Google Earth”

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”

Geo-Referencing raster image in QGIS w.r.t. vector file

Geo-Referencing raster image in QGIS with respect to vector file. Geo referencing is the process used to provide geographical information to the raster images like cadastral maps, physical maps and satellite imagery with the help of projection or coordinate system. As an ordinary raster image formed by the number of pixel which has no particular size, … Continue reading “Geo-Referencing raster image in QGIS w.r.t. vector file”

Connect QGIS to oracle spatial – Quantum GIS

How to connect QGIS to oracle spatial. QGIS can now connects to oracle to view spatial data and process it, great news for an open source software believers. As a newbie to QGIS user, i can just give a way, that i connected to it. How to connect QGIS to oracle spatial : 1.) Firstly … Continue reading “Connect QGIS to oracle spatial – Quantum GIS”