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”

Pan-sharpening images using ArcGIS

Pan-sharpening images using ArcGIS. Pansharpening is the process which makes use of panchromatic image and some bands of multispectral image to result in a high resolution image. Pansharpening stands for panchromatic sharpening. Here sharpening basic refers to increase the spatial resolution of multisprectral image or color image. This technique of increasing resolution has been used … Continue reading “Pan-sharpening images using ArcGIS”

c++ program to read shapefile header

c++ program to read shapefile header. Shapefile can be read if you know the format of Shapefile files i.e of .shp, .shx, and .dbf file. ESRI provided technical description of the Shapefile files which describes very clearly about the format of storage of data in all three formats i.e .shp, .shx and .dbf. You can … Continue reading “c++ program to read shapefile header”

Get minimum Bounding box of shapefile c++ program

Get minimum Bounding box of shapefile c++ program. This program not only reads shapefile, but makes you aware to read other files, i.e files which have .dbf, .exe, .png etc format without having software. Before that you should know about bits, byte order, and conversion of bytes to other data types and most importantly the format of … Continue reading “Get minimum Bounding box of shapefile c++ program”

What is GIS | Geographic Information System

What is GIS | Geographic Information System? GIS is an Abbreviation of Geographical Information System or Geo-spatial Information Systems or Geologic Information Systems (also Geo-spatial database management). As the name suggest ‘GIS’ is related to geographical information. But before explaining what is GIS?, we should know about what Geographic information means? Geographic information is knowledge of where something is. It defines the spatial reference of … Continue reading “What is GIS | Geographic Information System”

How to remove gaps from a polygon layer file in ArcGIS?

How to remove gaps from a polygon layer file in ArcGIS? While preparing polygon layer file following various stages of layer preparation like Digitization, Spatial adjustment, Merging and Cleaning. This is what making it suitable to be used by a web application as an input. While layer file should be accurate with minimum error before … Continue reading “How to remove gaps from a polygon layer file in ArcGIS?”