期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：High-resolution satellites such has IRS-1C/1D/Resourcesat-1 and Cartosat-1 have been launched to cater the needs of various application users. These satellites carry panchromatic sensors of 5m or 2.5m resolution respectively. To upsurge the utilization of this data and to improve the image interpretation capability, various digital image processing techniques have been implemented as software utilities. These are being used operationally at value added products generation centers of NRSA. PAN and Multi spectral data merging is used to achieve high-resolution multi spectral data. This type of data increased the demand for toposheet based merged products for national missions (projects), which are of bulk quantity ranging from 500 to 4000 products at various scales. All map based merged products generated so far have been archived and created a database for future reference. These products are used for applications requiring temporal studies. To organize the database for easy access and retrieval, a software package "Digital Mapbase" is developed using java as front-end and MS-Access as backend. The thumbnail images (using customized compression technique) of this database are linked to GUI of the package for faster access. This package provides facility to view the browse images of the database with various input queries like toposheet Id., place name or geographic coordinate etc. The metadata corresponding to each product of the database can also be accessed. This paper enumerates the database information in detail and the techniques adopted at various levels of database retrieval and graphical presentation
