3. Methodology and Software Used:
In recent times the Remote Sensing and GIS tools are utilized as an important tool for applying demographic and related statistics for the analysis and planning of socio – economic development. The use of GIS in creating a tabular database and linking it with a geographic, database and converting the data into spatial form, which maps can be generated, proves the advantage and usefulness of GIS in these kinds of studies.
The steps that have been incorporated are:
- Georeferencing the Toposheet in UTM Grid system, datum WGS 84.
- Visual interpretation of Quick Bird image and on-screen digitization using Erdas Imagine and Arc GIS software’s.
- Creation of a polygon theme consisting of the house structures of Chharora village and creating a house attribute table.
- Preparation of socio-economic database.
- Joining of house attribute table and the data base file.
- Creation of thematic maps based on demographic and socio-economic parameters.
DETAILS OF DATA
DATA USED |
ACQUISITION/SURVEY DATE |
SCALE |
Satellite Data
Quick Bird Natural Colour, 61 cm |
21-07-2005 |
1:2000 |
Toposheet: Survey of India Toposheet No. 53 D/16 |
|
1:50,OOO |
Toposheet: Survey of India Toposheet No. 53 D/16/NE |
|
1:25,OOO |
Other Data Used:
Primary Survey had collected non-attribute data on Socio-Economic parameters and social and physical infrastructure from village
4.Why High Resolution Satellite Data Needed?
For village developmental planning, the combination of multispectral data for classification and high-resolution panchromatic data enables automated feature extraction of all type of constructions/ house structures, roads, pathways, streets, village amenities and facilities, sprawl and change detection, monitoring growth, and illegal construction detection other land use features. Imagery in 8-bit formats has limited use in village situations like of Chharora village due to various reasons. On other hand, the high-resolution satellites like QuickBird and IKONOS have 11-bit formats for full dynamic range. In these satellites, the Dynamic Range Adjust (DRA) options, which help, modifies grayscale values to enhance visual interpretability, thus by selecting DRA off facilitate absolute radiometric accuracy.
5.Which was the First High Resolution Satellite?
In 1999, when the satellite IKONOS, means ‘image’ in Greek, successfully launched, it became first commercial satellite in the world to collect 1-meter panchromatic (black-and-white) images and 4-meter resolution multispectral imagery. Its standard products include 1-meter black-and-white, 4-meter multispectral (all bands), 1-meter color (true color, false color, or 4-band), and a 1-meter and 4-meter data bundled. IKONOS image data is available for any location on the earth’s surface in easy to use 8-bit or full dynamic range 11-bit format Space Imaging company (presently known as GeoEye, after merging of ORBIMAGE and Space Imaging) provided its products, which has set the standards for quickly delivering of tonally balanced data, as well as mosaiced images for various applications.