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Survey of Sri Lanka and a central database

General discussion

The format described here under, has evolved from the Digital Vector Data (DVD-3) format, which was earlier designed as the National Standard Exchange Format for Survey of Sri Lanka digital Cartographic vector data. This format catered for point, line and polygon topology describing relationships among spatial features. The currently proposed format has the provision to include digital images acquired by satellites and Digital Elevation Model (DEM) and coded raster data. Furthermore, the NSDE format also accommodates various types of thematic data sets along with the associated attribute data in tabular form.

The data in NSDE Format will be supplied to users as a set of files. When supplying the data on media all the files would be copied unlabeled in the same sequence with the End-Of-File (EOF) mark after each file and one extra EOF mark at the end of all files to indicate the end. In case the dataset cannot be accommodated in one media, the files will be copied sequentially into additional media which will be serially numbered and indicated in first file.

admin 15 Sep, 2019

When supplying the data on media all the files would be copied unlabeled in the same sequence with the End-Of-File (EOF) mark after each file and one extra EOF mark at the end of all files to indicate the end. In case the dataset cannot be accommodated in one media, the files will be copied sequentially into additional media which will be serially numbered and indicated in first file.