High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

image will be sufficient enough to generate thematic maps with limited
topographic information.
4. The pilot studies established the standards and procedures for generation of
thematic layers and also overlaying of cadastral information, linking of Record
of Rights and other respective stakeholder’s attribute data to generate
thematic geospatial information at the resolution of 1:10,000 required for
various developmental programmes including grass root kevel support &
planning, infrastructure, disaster management programmes and
environmental studies.
5. It is recommended that dual frequency GPS base station and rovers should be
used for collection of horizontal and vertical Ground Control Points (GCP) in
the field. GTS bench marks with 4 th decimal meter can be provided by SOI for
calculation of ortho heights above Mean Sea Level (MSL). All control points to
be fitted in WG584 system and are to be post pointed on satellite imagery.
6. Where maps on scale 1:25, 000 are not available, DEM’s can easily generated
from the stereo images on digital photogrammetric work stations provided the
height control points (BMs) are established, post-pointed and georeferenced.
It is suggested 5 m contour will be interpolated for plain areas from 10m DEM
and also suggested that 10m contour interval will be for hilly / forest areas to
be depicted on map (10m contour and 5m interpolated with different
symbology)
7. It is recommended that all the thematic layers be generated upto level III of
NRDMS data models provided in Annexure V and NRSC created topographic
Data models provided in annexure VI.
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