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

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”

Create save Export and download KML file from Google map

Create save Export and download KML file from Google map.  Google map or Google Earth makes use of KML or keyhole markup language, to display features, which actually stores geographic features in Vector format. You can create KML file from Google map for mapping and displaying the same by again uploading the same KML file on Google map or created KML file converted from … Continue reading “Create save Export and download KML file from Google map”

Upload or Import KML file on Google map

Upload or import KML file on Google map. KML or Keyhole Markup Language is file which models and stores geographic features for display in Google Earth or Google maps. You can upload and view the KML file you already created on Google Map, to verify Whether the overlapped feature of KML uploaded has proper valid geometry or not in respect to the Google Map … Continue reading “Upload or Import KML file on Google map”

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”

Download and Install quantum GIS – QGIS with oracle connectivity

Download and Install quantum GIS – QGIS with oracle connectivity. Quantum GIS is an open source cross platform software for developing GIS (Geographic information System) solutions. QGIS connects to large set of spatial database and supports many data file formats, which enable us to visualize data, analyze data, edit data and generate a final map. … Continue reading “Download and Install quantum GIS – QGIS with oracle connectivity”

Merge more than two Shapefile in QGIS

Merge more than two Shapefile in QGIS. Do you want to merge two or more than two Shapefile? Do all the Shapefile are of same shape type i.e the Shapefile which can be merged with each other should have an identical shape, i.e either  “Point”, “Line” or “Polygon”? Do Shapefile all 3 files i.e .shx, .shp and … Continue reading “Merge more than two Shapefile in QGIS”