Update of topographic maps of Iraq, scale of 1: 50 000 using satellite image – ikonos
Journal Title: Геодезія, картографія і аерофотознімання - Year 2016, Vol 83, Issue 83
Abstract
The aim is to find accurate, fast and economical way to update maps with information obtained by remote sensing data. There were all the necessary research to update the maps of the study area city of Kerbala (Iraq) scale 1: 50,000, which was last upgraded in 1984. Method. Updating map was carried out in three stages. The first stage – the digital processing of satellite images and maps using GIS professional ArcGIS9. After combining the coordinate system of satellite images and maps was performed controlled classification. Updating map was carried out by comparing each layer derived from satellite images, with its analogue map, study increase the city Kerbala and fixing changes that have occurred in the network of roads and canals. The second phase – field research. This phase includes identification of all parts of the study area, the choice of clear points on the satellite image as a reference (GCP). These reference points used for geometric correction of the image. The obligatory part of this stage is to convert the data obtained from satellite images, since the satellite images used World Geodetic Datum (WGS84), and the reference points have the coordinates in the old system of Iraq (Clark). We used 30 points located throughout the region under study, each of which is the intersection of two or more lines or transport interchange. The third stage of the research was to manufacture cards. This stage involves the production of digital maps that are compatible with GIS and further assess their accuracy. Results. As a result of the research determined how to update old topographic maps with detailed recommendations for their vectorization, updated map created using DGPS, remote sensing and GIS technology for high-precision digital multifunction cards studied region. Scientific novelty. The method of controlled classification of satellite images to quickly update the old maps accurately applying new facilities. The practical significance. The technique of updating map scale of 1: 50,000, which is based on semi-automatic classification of satellite images allows a sufficiently short time to change objects. For Iraq at present, this problem is very important, since the last update maps of smaller scale and still enforced in 1984.
Authors and Affiliations
R. A. Abdallah, B. V. Chetverikov
Keywords
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